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Analog Circuit Design Volume Three
 
 

Analog Circuit Design Volume Three, 1st Edition

Design Note Collection

 
Analog Circuit Design Volume Three, 1st Edition,Bob Dobkin,John Hamburger,ISBN9780128000014
 
 
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A rich collection of applied circuit design solutions for analog circuit design

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Key Features

  • A rich collection of applied analog circuit design solutions for use in your own designs.
  • Each Design Note is presented in a concise, two-page format, making it easy to read and assimilate.
  • Contributions from the leading lights in analog design, including Bob Dobkin, Jim Williams, George Erdi and Carl Nelson, among others.
  • Extensive sections covering power management, data conversion, signal conditioning, and wireless/RF.

Description

Design Note Collection, the third book in the Analog Circuit Design series, is a comprehensive volume of applied circuit design solutions, providing elegant and practical design techniques. Design Notes in this volume are focused circuit explanations, easily applied in your own designs. This book includes an extensive power management section, covering switching regulator design, linear regulator design, microprocessor power design, battery management, powering LED lighting, automotive and industrial power design. Other sections span a range of analog design topics, including data conversion, data acquisition, communications interface design, operational amplifier design techniques, filter design, and wireless, RF, communications and network design.
Whatever your application -industrial, medical, security, embedded systems, instrumentation, automotive, communications infrastructure, satellite and radar, computers or networking; this book will provide practical design techniques, developed by experts for tackling the challenges of power management, data conversion, signal conditioning and wireless/RF analog circuit design.

Readership

Electronic design engineers; analog designers; engineering students; electronics hobbyists (advanced).

Bob Dobkin

Bob Dobkin is a founder and Chief Technical Officer of Linear Technology Corporation. Prior to 1999, he was responsible for all new product development at Linear. Before founding Linear Technology in 1981, Dobkin was Director of Advanced Circuit Development at National Semiconductor for eleven years. He has been intimately involved in the development of high performance linear integrated circuits for over 30 years and has generated many industry standard circuits. Dobkin holds over 100 patents pertaining to linear ICs and has authored over 50 articles and papers. He attended the Massachusetts Institute of Technology.

Affiliations and Expertise

Linear Technology Corporation, Milpitas, CA, USA

View additional works by Bob Dobkin

John Hamburger

John Hamburger directs global marketing communications programs at Linear Technology, where he was instrumental in developing the Analog Circuit Design book series. Previously with Luminous Networks and Terayon Communication Systems, he helped define marketing strategy from startup to public company, and held positions with Cypress Semiconductor and AMD. Prior to his career in high tech, he was an editor for Addison-Wesley, Harper & Row, WH Freeman, Harcourt Brace, Stanford University Press, and Runner’s World. He holds a degree from the University of Chicago.

Affiliations and Expertise

Linear Technology Corporation, Milpitas, CA, USA

Analog Circuit Design Volume Three, 1st Edition

  • Dedication 1
  • Dedication 2
  • Publishers note
  • Acknowledgements
  • Introduction
  • Foreword
  • Part 1: Power Management
    • Section 1: Power Management Design
    • Chapter 1: High Performance Single Phase DC/DC Controller with Power System Management
      • Abstract
      • Introduction
      • 1.8V/30A single phase digital power supply with IIN sense
      • Input current sensing
      • Inductor DCR autocalibration
      • LTpowerPlay GUI
      • Conclusion
    • Chapter 2: One Device Replaces Battery Charger, Pushbutton Controller, LED Driver and Voltage Regulator ICs in Portable Electronics
      • Abstract
      • Introduction
      • Pushbutton control
      • Battery, USB, wall and high voltage input sources
      • Battery charger
      • Three bucks, two LDOs and a boost/LED driver
      • Conclusion
    • Chapter 3: Simple Circuit Replaces and Improves on Power Modules at Less Than Half the Pricea
      • Abstract
      • Introduction
      • 100W isolated synchronous forward converter in an eighth brick footprint
      • This circuit is flexible
      • Conclusion
    • Chapter 4: Wide Input Range, High Efficiency DDR Termination Power Supply Achieves Fast Transient Response
      • Abstract
      • Introduction
      • Overview of the LTC3717
      • Design example
      • Conclusion
    • Chapter 5: LTC1628-SYNC Minimizes Input Capacitors in Multioutput, High Current Power Supplies
      • Abstract
      • Introduction
      • Design details
      • Conclusion
    • Chapter 6: Dual-Phase High Efficiency Mobile CPU Power Supply Minimizes Size and Thermal Stress
      • Abstract
      • Introduction
      • Design example
      • Conclusion
    • Chapter 7: SOT-23 SMBus Fan Speed Controller Extends Battery Life and Reduces Noise
      • Abstract
      • Introduction
      • Boost-start timer, thermal shutdown and overcurrent clamp features
      • Conclusion
    • Chapter 8: Active Voltage Positioning Reduces Output Capacitors
      • Abstract
      • Introduction
      • Basic principle
      • Basic implementation
      • Current mode control example—LTC1736
    • Chapter 9: 5V to 3.3V Circuit Collection
      • Abstract
      • High efficiency 3.3V regulator
      • 3.3V battery-powered supply with shutdown
      • 3.3V supply with shutdown
      • LT1585 linear regulator optimized for desktop Pentium processor applications
      • LTC1148 5V to 3.38V Pentium power solution 3.5A output current
      • LTC1266 switching regulator converts 5V to 3.38V at 7A for Pentium and other high speed μPs
    • Chapter 10: Hex Level Shift Shrinks Board Space
      • Abstract
  • Section 2: Microprocessor Power Design
    • Chapter 11: Cost Effective, Low Profi le, High Efficiency 42A Supply Powers AMD Hammer Processors
      • Abstract
      • Introduction
      • Design example
      • Conclusion
    • Chapter 12: Efficient, Compact 2-Phase Power Supply Delivers 40A to Intel Mobile CPUs
      • Abstract
      • Introduction
      • Smaller inductors, simplified thermal management
      • 40A Intel IMVP-III voltage regulator
      • Conclusion
    • Chapter 13: Microprocessor Core Supply Voltage Set by I2C Bus without VID Lines
      • Abstract
      • Introduction
      • How it works
      • Why use an SMBus?
      • Desktop/portable VID DC/DC converter
    • Chapter 14: High Efficiency I/O Power Generation for Mobile Pentimum III Microprocessors
      • Abstract
    • Chapter 15: PolyPhase Surface Mount Power Supply Meets AMD Athlon Processor Requirements with No Heat Sink
      • Abstract
      • Introduction
      • PolyPhase architecture
    • Chapter 16: 2-Step Voltage Regulation Improves Performance and Decreases CPU Temperature in Portable Computers
      • Abstract
      • 1-step vs 2-step power conversion
      • Circuit description
      • Regulator efficiency considerations
    • Chapter 17: Dual Regulators Power Pentium Processor or Upgrade CPU
      • Abstract
      • A simple solution
      • Conclusion
      • Design equations
    • Chapter 18: Big Power for Big Processors: A Synchronous Regulator
      • Abstract
      • LTC1430 performance features
      • A typical 5V to 3.3V application
    • Chapter 19: High Efficiency Power Sources for Pentium Processors
      • Abstract
      • Selection of input source
      • Transient response considerations
      • Circuit operation
    • Chapter 20: Fast Regulator Paces High Performance Processors
      • Abstract
    • Chapter 21: Techniques for Deriving 3.3V from 5V Supplies
      • Abstract
    • Chapter 22: Regulator Circuit Generates Both 3.3V and 5V Outputs from 3.3V or 5V to Run Computers and RS232
      • Abstract
      • Mixed 3.3V and 5V RS232 operation
  • Section 3: Switching Regulator Basics
    • Chapter 23: Tiny, Highly Flexable, Dual Boost/Inverter Tracks Supplies
      • Abstract
      • Introduction
      • LT3471 features
      • Easy-to-implement ±15V dual tracking supplies
      • Conclusion
    • Chapter 24: Ultralow Noise Switching Power Supplies Simplify EMI Compliance
      • Abstract
      • Introduction
      • Circuit description
      • Conclusion
    • Chapter 25: Monolithic DC/DC Converters Break 1MHz to Shrink Board Space
      • Abstract
    • Chapter 26: Capacitor and EMI Considerations for New High Frequency Switching Regulators
      • Abstract
      • Capacitor technology considerations
      • Controlling EMI: conducted and radiated
    • Chapter 27: Switching Regulator Generates Both Positive and Negative Supply with a Single Inductor
      • Abstract
    • Chapter 28: Floating Input Extends Regulator Capabilities
      • Abstract
    • Chapter 29: Programming Pulse Generators for Flash Memories
      • Abstract
    • Chapter 30: Achieving Microamp Quiescent Current in Switching Regulators
      • Abstract
    • Chapter 31: Inductor Selection for Switching Regulators
      • Abstract
  • Section 4: Switching Regulator Design: Buck (Step-Down)
    • Chapter 32: Inverting DC/DC Controller Converts a Positive Input to a Negative Output with a Single Inductor
      • Abstract
      • Advanced controller capabilities
      • −5.2V, 1.7A converter operates from a 4.5V to 16V source
      • High efficiency
      • Conclusion
    • Chapter 33: 20V, 2.5A Monolithic Synchronous Buck SWITCHER+ with Input Current, Output Current and Temperature Sensing/Limiting Capabilities
      • Abstract
      • Introduction
      • Output/input current sensing
      • Temperature sensing
      • Conclusion
    • Chapter 34: 1.5A Rail-to-Rail Output Synchronous Step-Down Regulator Adjusts with a Single Resistor
      • Abstract
      • Introduction
      • Operation
      • Applications
      • Conclusion
    • Chapter 35: 42V, 2.5A synchronous step-down regulator with 2.5μA quiescent current
      • Abstract
      • Introduction
      • High efficiency synchronous operation
      • Short-circuit robustness using small inductors
      • Current sense and monitoring with the LT8611
      • Wide input range operation at 2MHz
      • Low dropout operation
      • Conclusion
    • Chapter 36: Bootstrap Biasing of High Input Voltage Step-Down Controller Increases Converter Efficiency
      • Abstract
      • Introduction
      • Employing EXTVCC to improve efficiency
      • Voltage doubler for output voltages below 4.7V
      • Conclusion
    • Chapter 37: 36V, 3.5A Dual Monolithic Buck with Integrated Die Temperature Monitor and Standalone Comparator Block
      • Abstract
      • Introduction
      • High input voltage with high transient capability
      • On-die temperature monitoring
      • Standalone comparator block
      • Other features
      • Conclusion
    • Chapter 38: High Efficiency, High Density 3-Phase Supply Delivers 60A with Power Saving Stage Shedding, Active Voltage Positioning and Nonlinear Control for Superior Load Step Response
      • Abstract
      • Introduction
      • 1.5V/60A, 3-phase power supply
      • Conclusion
    • Chapter 39: 2-Phase Synchronous Buck Controller Features Light Load Stage Shedding Mode, Active Voltage Positioning, Low RSENSE and Remote VOUT Sensing
      • Abstract
      • Introduction
      • High efficiency, 2-phase, 4.5V to 14V input, 1.5V/50A output converter
      • Stage Shedding mode
      • Active voltage positioning
      • Inductor DCR sensing temperature compensation
      • Output voltage remote sensing
      • Conclusion
    • Chapter 40: Dual Output High Efficiency Converter Produces 3.3V and 8.5V Outputs from a 9V to 60V Rail
      • Abstract
      • Introduction
      • Feature rich
      • Dual output application
      • Single output application
      • Conclusion
    • Chapter 41: Dual Output Step-Down Controller Produces 10% Accurate, Efficient and Reliable High Current Rails
      • Abstract
      • Introduction
      • 1.5V/20A and 1.2V/20A buck converter with remote sensing and NTC compensated DCR sensing
      • PolyPhase operation
      • Other important features
      • Conclusion
    • Chapter 42: 15VIN, 4MHz Monolithic Synchronous Buck Regulator Delivers 5A in 4mm ՠ4mm QFN
      • Abstract
      • Introduction
      • 1.8VOUT, 2.25MHz buck regulator
      • 1.2VOUT, 10A, dual phase supply
      • Conclusion
    • Chapter 43: Dual Output Buck Regulator with Current Partitioning Optimizes Efficiency in Space-Sensitive Applications
      • Abstract
      • Introduction
      • Flexible current partitioning
      • Operation modes and efficiency
      • Application examples
      • Conclusion
    • Chapter 44: Triple Buck Regulator Features 1-Wire Dynamically Programmable Output Voltages
      • Abstract
      • Introduction
      • Three individually programmable bucks
      • Configure parallel power stages for different loads
      • Power good indicator
      • Power saving operating modes
      • Programmable clock frequency
      • 2-output, individually programmable 1.2A regulators
      • Conclusion
    • Chapter 45: Buck Converter Eases the Task of Designing Auxiliary Low Voltage Negative Rails
      • Abstract
      • Introduction
      • Leave the transformer alone: −3.3VOUT from −12VIN
      • Conclusion
    • Chapter 46: Monolithic Synchronous Step-Down Regulator Delivers up to 12A from a Wide Input Voltage Range
      • Abstract
      • Introduction
      • Typical application example
      • Paralleling regulators for >12A
      • Conclusion
    • Chapter 47: Step-Down Synchronous Controller Operates from Inputs Down to 2.2V
      • Abstract
      • Introduction
      • “Dying gasp” applications
      • Generate a negative voltage from a low positive VIN
      • Wide input voltage range
      • Conclusion
    • Chapter 48: Compact I2C-Controllable Quad Synchronous Step-Down DC/DC Regulator for Power-Conscious Portable Processors
      • Abstract
      • Introduction
      • Four I2C-controllable regulators
      • Power saving operating modes
      • I2C programming of output voltages allows easy sequencing, tracking and margining
      • Conclusion
    • Chapter 49: Compact Triple Step-Down Regulator Offers LDO Driver and Output Tracking and Sequencing
      • Abstract
      • Introduction
      • 6V to 36V input to four outputs—1.8V, 3.3V, 5V and 2.5V—one IC
      • Low ripple high frequency operation even at high VIN/VOUT ratios
      • Input voltage lockout and sequencing
      • Conclusion
    • Chapter 50: A Positive-to-Negative Voltage Converter Can Be Used for Stable Outputs Even with a Widely Varying Input
      • Abstract
      • Basic operation
      • Component stress in a positive-to-negative topology
      • Circuit description
      • Conclusion
    • Chapter 51: One IC Generates Three Sub-2V Power Rails from a Li-Ion Cell
      • Abstract
      • Introduction
      • Triple supply in a tiny package
      • High efficiency and low noise
      • Selectable Burst Mode operation or pulse-skipping at light load
      • Very low dropout (VLDO) linear regulators
      • Power good detection
      • Conclusion
    • Chapter 52: 36V 2A Buck Regulator Integrates Power Schottky
      • Abstract
      • Introduction
      • A small, simple solution
      • Low ripple and high efficiency solution over a wide load range
      • Frequency foldback saves chips
      • Conclusion
    • Chapter 53: Triple Output 3-Phase Controller Saves Space and Improves Performance in High Density Power Converters
      • Abstract
      • Conclusion
    • Chapter 54: Dual Monolithic Step-Down Switching Regulator Provides 1.6A Outputs with Reduced EMI and VOUT as Low as 0.8V
      • Abstract
      • Introduction
      • Typical LT3506A and LT3506 applications
      • Power sequencing without adding components
      • 2-phase switching eases EMI concerns
      • Conclusion
    • Chapter 55: A Compact Dual Step-Down Converter with VOUT Tracking and Sequencing
      • Abstract
      • Introduction
      • LT3501 dual converter features
      • Output supply tracking and sequencing
      • High current single VOUT, low ripple 6A output
    • Chapter 56: Tiny Monolithic Step-Down Regulators Operate with Wide Input Range
      • Abstract
      • Introduction
      • Low ripple and high efficiency solution over wide load range
      • Small solution size
      • Additional features of LT3481 and LT3493
      • Conclusion
    • Chapter 57: Cascadable 7A Point-of-Load Monolithic Buck Converter
      • Abstract
      • Introduction
      • Features
      • Operation
      • Greater than 7A outputs
      • Conclusion
    • Chapter 58: High Voltage Current Mode Step-Down Converter with Low Power Standby Capability
      • Abstract
      • Introduction
      • High efficiency at standby
      • 12V/75W synchronous buck DC/DC converter
    • Chapter 59: Low EMI Synchronous DC/DC Step-Down Controllers Offer Programmable Output Tracking
      • Abstract
      • Introduction
      • Three choices for start-up control
      • Low EMI DC/DC conversion
      • Conclusion
    • Chapter 60: ThinSOT Micropower Buck Regulator Has Low Output Ripple
      • Abstract
      • Introduction
      • Current mode control
      • Design flexibility with integrated boost diode
      • Conclusion
    • Chapter 61: Tiny Versatile Buck Regulators Operate from 3.6V to 36V Input
      • Abstract
      • Introduction
      • Small size and versatility
      • LT1936 produces 3.3V at 1.2A from 4.5V to 36V
      • Producing a lower output voltage from the LT1936
      • Negative output from a buck regulator
      • Tiny circuit generates 3.3V and 5V from a minimum 4.5V supply
      • Conclusion
    • Chapter 62: High Accuracy Synchronous Step-Down Controller Provides Output Tracking and Programmable Margining
      • Abstract
      • Introduction
      • Start-up and shutdown output tracking
      • Programmable voltage margining
      • Additional features
      • Conclusion
    • Chapter 63: 60V, 3A Step-Down DC/DC Converter Has Low Dropout and 100µA Quiescent Current
      • Abstract
      • Introduction
      • Burst Mode operation
      • Low dropout
      • Soft-start
      • Power good
      • Conclusion
    • Chapter 64: Monolithic Synchronous Regulator Drives 4A Loads with Few External Components
      • Abstract
      • Introduction
      • High efficiency 2.5V/4A step-down regulator
      • High efficiency 3.3V/4A step-down regulator with all ceramic capacitors
      • Conclusion
    • Chapter 65: High Performance Power Solutions for AMD Opteron and Athlon 64 Processors
      • Abstract
      • Introduction
      • 3-phase, 65A AMD VRM design
      • Conclusion
    • Chapter 66: High Current Step-Down Controller Regulates to 0.6V Output from 3V Input
      • Abstract
      • Introduction
      • Design examples
      • Conclusion
    • Chapter 67: Effi cient Dual Polarity Output Converter Fits into Tight Spaces
      • Abstract
      • Introduction
      • 12V input, ±5V output, only 3mm high
      • Typical bucks with second, negative outputs
      • Conclusion
    • Chapter 68: Dual Output Supply Powers FPGAs from 3.3V and 5V Inputs
      • Abstract
      • Introduction
      • Circuit description
      • Conclusion
    • Chapter 69: 3A, 2MHz Monolithic Synchronous Step-Down Regulator Provides a Compact Solution for DDR Memory Termination
      • Abstract
      • Introduction
      • 3A, 2.5V to 1.25V step-down DC/DC converter
      • Conclusion
    • Chapter 70: 60V/3A Step-Down DC/DC Converter Maintains High Efficiency Over a Wide Input Range
      • Abstract
      • Introduction
      • Efficiency
      • Small size, low output ripple voltage (high switching frequency, all ceramic solution)
      • Peak switch current (not your average current mode converter)
      • Conclusion
    • Chapter 71: Monolithic Synchronous Step-Down Regulators Pack 600mA Current Rating in a ThinSOT Package
      • Abstract
      • Introduction
      • Space saving
      • Versatile
      • Fault protection
      • Efficient Burst Mode operation (LTC3406 series)
      • Pulse-skipping mode (LTC3406B series) for low noise
      • 1.8V/600mA step-down regulator using all ceramic capacitors
      • Efficiency considerations
    • Chapter 72: High Efficiency Adaptable Power Supply for XENPAK 10Gb/s Ethernet Transceivers
      • Abstract
      • Introduction
      • Adaptable power supply
      • Conclusion
    • Chapter 73: High Voltage Buck Regulators Provide High Current, Low Profi le Power Solutions for FireWire Peripherals
      • Abstract
      • Introduction
      • Circuit descriptions
      • Conclusion
    • Chapter 74: Efficient DC/DC Converter Provides Two 15A Outputs from a 3.3V Backplane
      • Abstract
      • Introduction
      • Design example
      • Conclusion
    • Chapter 75: 60V Step-Down DC/DC Converter Maintains High Efficiency
      • Abstract
      • Introduction
      • Efficiency
      • Output ripple voltage
      • Peak switch current
      • LT1766 features
    • Chapter 76: Tiny Buck Regulator Accepts Inputs from 3.6V to 25V and Eliminates Heat Sink
      • Abstract
      • Introduction
      • Complete switcher in ThinSOT results in compact solution
      • The LT1616 produces 3.3V at 400mA
      • Ceramic capacitors are best
      • Smaller than a TO-220
      • 2.5V output
    • Chapter 77: 1.4MHz Switching Regulator Draws Only 10µA Supply Current
      • Abstract
      • Introduction
      • LTC3404 features
      • 3.1V/600mA step-down regulator
      • Externally synchronized 3.1V/600mA step-down regulator
      • Conclusion
    • Chapter 78: 10µA Quiescent Current Step-Down Regulators Extend Standby Time in Handheld Products
      • Abstract
      • Importance of low quiescent current
      • LTC1878 single Li-Ion to 2.5V regulator
      • LTC1771 3.3V/2A regulator
      • Low operating current without compromising transient response
    • Chapter 79: Low Cost PolyPhase® DC/DC Converter Delivers High Current
      • Abstract
      • Introduction
      • Design example
      • Overcurrent limit
      • Multiphase applications
      • Conclusion
    • Chapter 80: Unique High Efficiency 12V Converter Operates with Inputs from 6V to 28V
      • Abstract
      • 12V output, single inductor, buck/boost converter
      • Synchronous circuit for higher power, higher VIN
    • Chapter 81: Low Cost, High Efficiency 42A DC/DC Converter
      • Abstract
      • Introduction
      • Design example
      • Conclusion
    • Chapter 82: High Efficiency PolyPhase Converter Uses Two Inputs for a Single Output
      • Abstract
      • Introduction
      • Design details
      • A typical application
      • Test results
      • Conclusion
    • Chapter 83: High Current Dual DC/DC Converter Operates from 3.3V Input
      • Abstract
    • Chapter 84: Low Cost Surface Mount DC/DC Converter Delivers 100A
      • Abstract
      • Introduction
      • Design details
      • Conclusion
    • Chapter 85: LT1777 High Voltage, Low Noise Buck Switching Regulator
      • Abstract
      • Generating low noise, dual-voltage supplies
    • Chapter 86: Low Cost, High Efficiency 30A Low Profi le PolyPhase Converter
      • Abstract
      • Overview of the LTC1629
      • Design example: 30A 2-phase power supply
      • Conclusion
    • Chapter 87: 2-Phase Switching Regulator Fits in Tight Places
      • Abstract
    • Chapter 88: Low Dropout 550kHz DC/DC Controller Operates from Inputs as Low as 2V
      • Abstract
      • 2.5V, 4A buck DC/DC converter
      • “Zeta” step-up/step-down converter
    • Chapter 89: LTC1702/LTC1703 Switching Regulator Controllers Set a New Standard for Transient Response
      • Abstract
    • Chapter 90: 60V, High Efficiency Buck Switching Regulators in SO-8
      • Abstract
      • Generating low cost, dual-voltage supplies
      • Conclusion
    • Chapter 91: High Efficiency, Monolithic Synchronous Step-Down Regulator Works with Single or Dual Li-Ion Batteries
      • Abstract
      • Single Li-Ion applications
      • Auxiliary winding control using SYNC/FCB pin
    • Chapter 92: A Low Cost, Effi cient Mobile CPU Power
      • Abstract
    • Chapter 93: Optimizing a DC/DC converter’s output capacitors
      • Abstract
    • Chapter 94: LTC1626: Step-Down Converter Operates from Single Li-Ion Cell
      • Abstract
      • Introduction
      • Single-cell Li-Ion operation
      • 100% duty cycle in dropout mode
      • High efficiency 5V to 3.3V conversion
      • Current mode architecture
      • Low voltage low RDS(ON) switch
      • Conclusion
    • Chapter 95: Optimized DC/DC Converter Loop Compensation Minimizes Number of Large Output Capacitors
      • Abstract
      • External loop compensation can save money
      • Loop compensation using a dynamic load
    • Chapter 96: A High Efficiency 500kHz, 4.5A Step-Down Converter in an SO-8 Package
      • Abstract
      • High efficiency, 25V, 0.07Ω switch
      • 4.5A in an SO-8
      • Dual output SEPIC converter
    • Chapter 97: LTC1474/LTC1475 High Efficiency Switching Regulators Draw Only 10µA Supply Current
      • Abstract
      • Inductor current control
      • 3.3V/250mA step-down regulator
      • 3.3V/10mA regulator from a 4mA to 20mA loop
      • Pushbutton ON/OFF operation
    • Chapter 98: High Power Synchronous Buck Converter Delivers Up to 50A
      • Abstract
      • Introduction
      • Distributed power
      • Higher input voltages
      • Blame it on the physicists
    • Chapter 99: Single IC, Five Output Switching Power Supply System for Portable Electronics
      • Abstract
    • Chapter 100: Low Noise Switching Regulator Helps Control EMI
      • Abstract
      • New IC solves old problems
      • New feature provides new EMI control
      • Additional features
    • Chapter 101: Effi cient Processor Power System Needs No Heat Sink
      • Abstract
      • New IC powers portable Pentium processor and much more
      • High performance Pentium processor power
      • Portable Pentium processor power
    • Chapter 102: A New, High Efficiency Monolithic Buck Converter
      • Abstract
      • Efficiency
      • High frequency operation
      • Constant off-time architecture
      • 100% duty cycle in dropout mode
      • Good start-up and transient behavior
      • 2.5mm typical height 5V-to-3.3V regulator
      • Conclusion
    • Chapter 103: Switching Regulator Provides High Efficiency at 10A Loads
      • Abstract
      • N-channel vs P-channel
      • Driving N-channel MOSFETs
      • Basic circuit configurations
      • Conclusion
    • Chapter 104: Dual Output Regulator Uses Only One Inductor
      • Abstract
      • Regulation performance and efficiency
      • Output ripple voltage
    • Chapter 105: Highly Integrated High Efficiency DC/DC Conversion
      • Abstract
      • LTC1574
      • Low noise regulator
      • LTC1265
      • Battery charger application
      • LTC1574 or LTC1265?
    • Chapter 106: Ultra-Low Power, High Efficiency DC/DC Converter Operates Outside the Audio Band
      • Abstract
    • Chapter 107: Triple Output 3.3V, 5V, and 12V High Efficiency Notebook Power Supply
      • Abstract
    • Chapter 108: Single LTC1149 Provides 3.3V and 5V in Surface Mount
      • Abstract
      • Customizing the circuit
      • Construction notes
      • Other
    • Chapter 109: A Simple High Efficiency, Step-Down Switching Regulator
      • Abstract
      • 100% duty cycle in dropout
      • Positive-to-negative converter
    • Chapter 110: Delivering 3.3V and 5V at 17W
      • Abstract
      • Performance
      • Theory of operation
      • Circuit particulars
    • Chapter 111: Low Parts Count DC/DC Converter Circuit with 3.3V and 5V Outputs
      • Abstract
      • Performance
      • Inductor
      • Capacitors
      • Layout
      • Heat sinking
    • Chapter 112: New Synchronous Step-Down Switching Regulators Achieve 95% Efficiency
      • Abstract
    • Chapter 113: High Performance Frequency Compensation Gives DC-to-DC Converter 75µs Response with High Stability
      • Abstract
      • Inductors
      • Capacitors
      • Layout
      • Output adjustment
      • Heat sinking
  • Section 5: Switching Regulator Design: Boost Converters
    • Chapter 114: 1µA IQ Synchronous Boost Converter Extends Battery Life in Portable Devices
      • Abstract
      • Introduction
      • 1.8V to 5.5V input to 12V output boost regulator
      • Output disconnect
      • Start-up inrush current limiting
      • Conclusion
    • Chapter 115: Ultralow Power Boost Converters Require Only 8.5µA of Standby Quiescent Current
      • Abstract
      • Introduction
      • Application example
      • Ultralow quiescent current boost converter with output disconnect
      • Compatible with high impedance batteries
      • Conclusion
    • Chapter 116: Tiny Dual Full-Bridge Piezo Motor Driver Operates from Low Input Voltage
      • Abstract
      • Introduction
      • Single driver application
      • Using external power supply
      • Operating Piezo motor with long wires
      • Conclusion
    • Chapter 117: Tiny Synchronous Step-Up Converter Starts Up at 700mV
      • Abstract
      • Introduction
      • Conclusion
    • Chapter 118: High Efficiency 2-Phase Boost Converter Minimizes Input and Output Current Ripple
      • Abstract
      • Introduction
      • Conclusion
    • Chapter 119: ThinSOT Switching Regulator Controls Inrush Current
      • Abstract
      • Introduction
      • A simple solution
      • Conclusion
    • Chapter 120: Dual DC/DC Converter with Integrated Schottkys Generates ±40V Outputs and Consumes Only 40µA Quiescent Current
      • Abstract
      • Introduction
      • Dual output ±20V converter
      • Dual output (±40V) converter
      • CCD sensor bias supply
      • Conclusion
    • Chapter 121: Compact Step-Up Converter Conserves Battery Power
      • Abstract
      • Introduction
      • 16V bias supply
      • 20V bias supply with variable output voltage
      • ±20V bias supply
      • 34V bias supply
      • Conclusion
    • Chapter 122: 2-Phase Boost Converter Delivers 10W from a 3mm ՠ3mm DFN Package
      • Abstract
      • Introduction
      • Dual phase converter reduces output ripple
      • Smaller layout is possible by reducing the number of external components
      • Antiringing feature in discontinuous operation
      • Conclusion
    • Chapter 123: 4-Phase Monolithic Synchronous Boost Converter Delivers 2.5A with Output Disconnect in a 5mm ՠ5mm QFN Package
      • Abstract
      • Introduction
      • Multiple operating modes optimize performance in different applications
      • Fault protection
      • High power and high efficiency in a small package
      • Conclusion
    • Chapter 124: Boost Regulator Makes Low Profi le SEPIC with Both Step-Up and Step-Down Capability
      • Abstract
      • Introduction
      • 3V to 20V input, 5V output, 3mm maximum height SEPIC
      • 4V to 18V input, 12V output, 3mm maximum height SEPIC
      • Conclusion
    • Chapter 125: Dual Monolithic Buck Regulator Provides Two 1.4A Outputs with 2-Phase Switching to Reduce EMI
      • Abstract
      • Introduction
      • Circuit description
      • High frequency, current mode switching minimizes component size
      • 2-phase switching eases EMI concerns
      • Soft-start and power good pins simplify supply sequencing
      • Conclusion
    • Chapter 126: 4MHz Monolithic Synchronous Step-Down Regulators Bring High Efficiency to Space-Sensitive Applications
      • Abstract
      • Introduction
      • Multiple operating modes allow optimization of efficiency and noise suppression
      • Two 2.5V step-down converters
      • Conclusion
    • Chapter 127: Tiny and Efficient Boost Converter Generates 5V at 3A from 3.3V Bus
      • Abstract
      • Introduction
      • 3.3V input, 5V/3A output boost regulator
      • 2-cell input, 3.3V/1A output regulator
      • Conclusion
    • Chapter 128: Tiny Boost Controller Provides Efficient Solutions for Low Voltage Inputs
      • Abstract
      • Introduction
      • 3.3V to 5V converters
      • Choosing the MOSFET
      • Automotive supply
      • Conclusion
    • Chapter 129: Current-Limited DC/DC Converter Simplifies USB Power Supplies
      • Abstract
      • USB to 12V boost converter
      • USB to 5V SEPIC DC/DC converter with short-circuit protection
      • Li-Ion white LED driver
    • Chapter 130: 3MHz Micropower Synchronous Boost Converters Deliver 3W from Two Cells in a Tiny MSOP Package
      • Abstract
      • All-ceramic-capacitor, 2-cell to 3.3V, 1A converter
      • High efficiency Li-Ion CCFL backlight application
    • Chapter 131: SOT-23 Switching Regulator with Integrated 1A Switch Delivers High Current Outputs in a Small Footprint
      • Abstract
      • 5V local supply
      • 12V local supply
      • ±15V dual output converter with output disconnect
    • Chapter 132: A 500kHz, 6A Monolithic Boost Converter
      • Abstract
      • Circuit description
      • 5V to 12V boost converter
      • Positive to negative converter
      • 5V SEPIC converter
      • Conclusion
    • Chapter 133: Micropower 600kHz Step-Up DC/DC Converter Delivers 5V at 1A from a Li-Ion Cell
      • Abstract
      • Single Li-ion cell to 5V/1A DC/DC converter for GSM
      • 2-cell digital camera supply produces 3.3V, 5V, 18V and −10V
    • Chapter 134: LT1534 Ultralow Noise Switching Regulator Controls EMI
      • Abstract
      • Low noise boost regulator
      • Low noise bipolar supply
      • Additional LT1534 features
    • Chapter 135: Off-Line Low Noise Power Supply Does Not Require Filtering to Meet FCC Emission Requirements
      • Abstract
      • Introduction
      • Circuitry details
      • Performance characteristics
    • Chapter 136: “LCD bias” and “backup supply” applications for a micropower DC/DC converter
      • Abstract
      • 2-cell, low profile LCD bias generator fits in small places
      • Supercapacitor-powered backup supply
    • Chapter 137: Short-Circuit Protection for Boost Regulators
      • Abstract
      • Short-circuit protection and load disconnect with the LTC1477
      • Current-limited boost regulator
      • Short-circuit protection at higher power
    • Chapter 138: LT1307 Single-Cell Micropower Fixed-Frequency DC/DC Converter Needs No Electrolytic Capacitors
      • Abstract
      • Single-cell boost converter
      • 455kHz noise considerations
    • Chapter 139: 2 AA Cells Replace 9V Battery, Extend Operating Life
      • Abstract
    • Chapter 140: A Simple, Surface Mount Flash Memory Vpp Generator
      • Abstract
    • Chapter 141: No Design Switching Regulator 5V, 5A Buck (Step-Down) Regulator
      • Abstract
      • Introduction
      • Circuit description
      • Conclusion
  • Section 6: Switching Regulator Design: DC/DC Controllers
    • Chapter 142: Dual Controller Provides 2µs Step Response and 92% Efficiency for 1.5V Rails
      • Abstract
      • Introduction
      • 1.5V/25A and 1.2V/25A buck converter
      • Detect transient feature further speeds up transient response
      • Conclusion
    • Chapter 143: Dual DC/DC Controller for DDR Power with Differential VDDQ Sensing and ±50mA VTT Reference
      • Abstract
      • Introduction
      • High efficiency, 4.5V to 14V input, dual output DDR power supply
      • Load-release transient detection
      • VTT reference (VTTR)
      • VTT supply
      • Conclusion
    • Chapter 144: Single Resistor Sets Positive or Negative Output for DC/DC Converter
      • Abstract
      • Introduction
      • Sensing output voltage has never been easier
      • Adjustable/synchronizable switching frequency
      • Soft-start and undervoltage lockout
      • Boost converters
      • Cuk converter
      • SEPIC converters
      • Conclusion
    • Chapter 145: Multiphase DC/DC Controller Pushes Accuracy and Bandwidth Limits
      • Abstract
      • Introduction
      • A dual output, 2-phase supply with differential remote sensing and inductor DCR sensing
      • A tried-and-true architecture
      • Load step improvement with voltage positioning
      • Conclusion
    • Chapter 146: 2-Phase DC/DC Controller Makes Fast, Efficient and Compact Power Supplies
      • Abstract
    • Chapter 147: High Performance 3-Phase Power Supply Delivers 65A and High Efficiency Over the Entire Load Range
      • Abstract
      • Introduction
      • Stage Shedding operation
      • 3-phase high efficiency VRM9.x power supplies for Pentium 4 CPU
    • Chapter 148: Reduce Component Count and Improve Efficiency in SLIC and RF Power Supplies
      • Abstract
      • Introduction
      • A dual output SLIC supply with simplified feedback using the LTC3704
      • Improved battery protection using the LTC3704’s programmable undervoltage lockout
      • A current mode, −8.0V, 1.2A RF power supply with no current sense resistor
    • Chapter 149: SOT-23 DC/DC Converters Generate Up to ±35V Outputs and Consume Only 20µA of Quiescent Current
      • Abstract
      • ±20V dual output converter with output disconnect
      • 24V boost converter
      • 1V to 35V boost converter
      • 1-cell to 3V boost converter
  • Section 7: Switching Regulator Design: Buck-Boost Controllers
    • Chapter 150: 80V Synchronous 4-Switch Buck-Boost Controller Delivers Hundreds of Watts with 99% Efficiency
      • Abstract
      • Introduction
      • 240W 48V 5A telecom power supply
      • 500W charger for 12S liFePO4 battery
      • Four servo loops and wide voltage range
      • Conclusion
    • Chapter 151: Wide Input Voltage Range Boost/Inverting/SEPIC Controller Works Down to an Input Voltage of 1.6V
      • Abstract
      • Introduction
      • Wide input voltage range with internal LDO
      • Sensing output voltage made easier
      • Adjustable/synchronizable switching frequency
      • Precision UVLO and soft-start
      • A 2.5V to 15V to 12V SEPIC converter
      • A 1.8V to 4.5V to 5V/2A boost converter
      • Conclusion
    • Chapter 152: High Efficiency 4-Switch Buck-Boost Controller Provides Accurate Output Current Limit
      • Abstract
      • Introduction
      • LTC3789 features
      • 12V, 5A output from a 4V to 38V input
      • Accurate output (or input) current limit
      • Conclusion
    • Chapter 153: Buck-Boost Controller Simplifies Design of DC/DC Converters for Handheld Products
      • Abstract
      • Introduction
      • High efficiency controller capabilities
      • 3.3V, 3A converter operates from 2.7V–10V source
      • 95% efficiency
      • Conclusion
    • Chapter 154: Wide Input Voltage Range Buck-Boost Converter Simplifies Design of Variable Input Supplies
      • Abstract
      • Introduction
      • Efficiency
      • Programmable Burst Mode operation
      • 1.27mm profile Li-Ion to 3.3V regulator
      • Conclusion
    • Chapter 155: Buck or Boost: Rugged, Fast 60V Synchronous Controller Does Both
      • Abstract
      • Introduction
      • Feature rich controller
      • High efficiency 48V to 3.3V/6A power supply
      • High efficiency 12V to 24V/5A synchronous step-up fan power supply
    • Chapter 156: Industry’s first 4-switch buck-boost controller achieves highest efficiency using a single inductor
      • Abstract
      • Introduction
      • High efficiency 4-switch buck-boost converter
      • Replacing a SEPIC converter
      • Protection for boost operation
      • Simplify
      • Conclusion
    • Chapter 157: High Input Voltage Monolithic Switcher Steps Up and Down Using a Single Inductor
      • Abstract
      • Introduction
      • 4V–60V input to 5V output DC/DC automotive converter
      • 8V–60V input to 12V output DC/DC converter
      • Conclusion
    • Chapter 158: Supply 2A Pulses for GSM Transmission from 500mA USB or PCMCIA Ports
      • Abstract
      • Introduction
      • Powering GSM modems from USB or PCMCIA
      • 5V converter in USB On-The-Go devices
      • Conclusion
    • Chapter 159: Micropower Buck/Boost Circuits, Part 1: Converting Three Cells to 3.3V*
      • Abstract
    • Chapter 160: 250kHz, 1mA IQ Constant Frequency Switcher Tames Portable Systems Power
      • Abstract
      • 3.3V SEPIC converter
      • Dual output converter
    • Chapter 161: DC/DC Converters for Portable Computers
      • Abstract
    • Chapter 162: No Design Switching Regulator 5V Buck-Boost (Positive-to-Negative) Regulator
      • Abstract
      • Introduction
      • Circuit description
      • Conclusion
  • Section 8: Linear Regulator Design
    • Chapter 163: High Voltage Inverting Charge Pump Produces Low Noise Positive and Negative Supplies
      • Abstract
      • Introduction
      • Inverting charge pump
      • Constant frequency mode
      • Burst mode operation
      • Dual LDOs
      • Conclusion
    • Chapter 164: 80V Linear Regulator Is Micropower
      • Abstract
      • Introduction
      • Introducing the LT3010 high voltage LDO
      • A versatile and rugged regulator
      • Conclusion
    • Chapter 165: Very Low Dropout (VLDO) Linear Regulators Supply Low Voltage Outputs
      • Abstract
      • Introduction
      • VLDO circuit descriptions
      • Conclusion
    • Chapter 166: Lowest Noise SOT-23 LDOs Have 20µA Quiescent Current, 20µVRMS Noise
      • Abstract
      • Applying the regulators
      • Noise performance
      • Other advantages
      • Conclusion
    • Chapter 167: High Efficiency Linear and Switching Solutions for Splitting a Digital Supply
      • Abstract
    • Chapter 168: UltraFast Linear Regulator Eliminates All Bulk Tantalum and Electrolytic Output Capacitors
      • Abstract
      • Introduction
      • New LTC regulator controllers
      • Conclusion
    • Chapter 169: Fast Response Low Dropout Regulator Achieves 0.4 Dropout at 4 Amps
      • Abstract
      • Enter the LT1580
      • The LT1580 brings many new features
      • Circuit example
    • Chapter 170: Create a Virtual Ground with a Sink/Source Voltage Regulator
      • Abstract
    • Chapter 171: 5V to 3.3V Regulator with Fail-Safe Switchover
      • Abstract
    • Chapter 172: A Simple Ultra-Low Dropout Regulator
      • Abstract
    • Chapter 173: Powering 3.3V Digital Systems
      • Abstract
      • Regulator design
    • Chapter 174: A Simple Ultra-Low Dropout Regulator
      • Abstract
  • Section 9: Micromodule (µModule®) Power Design
    • Chapter 175: Dual 13A µModule Regulator with Digital Interface for Remote Monitoring & Control of Power
      • Abstract
      • Digital power system management: set, monitor, change and log power
      • Dual μModule regulator with precision READ/WRITE of power parameters
      • Internal or external compensation
      • Current share for up to 100A at 1VOUT
      • Conclusion
    • Chapter 176: 36V Input, Low Output Noise, 5A µModule Regulator for Precision Data Acquisition Systems
      • Abstract
      • Introduction
      • Integrated switching and linear regulators
      • PCB trace voltage compensation using SENSEP
      • Programmable output voltage
      • DC1738A highlights the LTM8028 capabilities
      • Noise test comparison using LTC2185 ADC
      • Conclusion
    • Chapter 177: Step-down μModule regulator produces 15A output from inputs down to 1.5V—no bias supply required
      • Abstract
      • 15A high efficiency output from a low input voltage
      • Input and output ripple
      • Thermally enhanced packaging
      • Conclusion
    • Chapter 178: Dual µModule DC/DC Regulator Produces High Efficiency 4A Outputs from a 4.5V to 26.5V Input
      • Abstract
      • Dual system-in-a-package regulator
      • Multiphase operation for four or more outputs
      • Thermal performance
      • Conclusion
    • Chapter 179: Triple Output DC/DC µModule® Regulator in 15mm ՠ15mm ՠ2.8mm Surface Mount Package Replaces Up to 30 Discrete Components
      • Abstract
      • Introduction
      • Dual switching 4A and 1.5A VLDO regulators
      • Multiple low noise outputs
      • Thermally enhanced packaging
      • Output voltage tracking
    • Chapter 180: Dual 8A DC/DC µModule Regulator Is Easily Paralleled for 16A
      • Abstract
      • Two independent 8A regulator systems in a single package
      • Simple and efficient
      • Parallel operation for increased output current
      • Conclusion
    • Chapter 181: µModule Buck-Boost Regulators Offer a Simple and Efficient Solution for Wide Input and Output Voltage Range Applications
      • Abstract
      • Introduction
      • High efficiency
      • Low profile solution
      • Smooth transition and circuit simplicity
      • Excellent thermal performance
      • Conclusion
    • Chapter 182: 8A Low Voltage, Low Profi le DC/DC µModule Regulator in 9mm ՠ15mm Package Weighs Only 1g
      • Abstract
      • Introduction
      • 8A DC/DC μModule regulator in an IC form factor
      • Wealth of features
      • Quick and easy design
      • Thermally enhanced packaging
      • Output voltage tracking
      • Current sharing: 8A + 8A = 16A
      • Fault conditions: overcurrent limit and thermal shutdown
      • Conclusion
    • Chapter 183: Simple and Compact 4-Output Point-of-Load DC/DC µModule System
      • Abstract
      • Introduction
      • 4-output DC/DC converter power system
      • Output tracking
      • Frequency synchronization
      • Conclusions
    • Chapter 184: 10A High Performance Point-of-Load DC/DC µModule Regulator
      • Abstract
      • Introduction
      • 10A DC/DC μModule regulator in IC form factor
      • Quick and easy design
      • Thermally enhanced packaging
      • Fast transient response
      • Paralleling the μModule regulator for 20A output
  • Section 10: Switching Regulators for Isolated Power Design
    • Chapter 185: Isolated Converters Have Buck Simplicity and Performance
      • Abstract
      • Simple isolated 3.3V, 30A forward converter
      • PolyPhase design ups power limit
      • Related products
      • Features
      • Conclusion
    • Chapter 186: Multiple Output Isolated Power Supply Achieves High Efficiency with Secondary Side Synchronous Post Regulator
      • Abstract
      • Introduction
      • Design example
      • Conclusion
    • Chapter 187: Chip Set Offers Low Cost Alternative to 48V Telecom Modules
      • Abstract
      • Isolated 48V to 3.3V supply
      • Conclusion
    • Chapter 188: 5V High Current Step-Down Switchers
      • Abstract
      • Low cost high efficiency (80%), high power density DC/DC converter
      • Synchronous switching eliminates heat sinks in a 50W DC/DC converter
  • Section 11: Power Control & Ideal Diode Design
    • Chapter 189: Ideal Diodes Protect Against Power Supply Wiring Errors
      • Abstract
      • Introduction
      • Types of misconnections
      • Conclusion
    • Chapter 190: Ideal Diode Controller Eliminates Energy Wasting Diodes inPower OR-ing Applications
      • Abstract
      • Introduction
      • Automatic power switching between two power sources
      • Load sharing
      • Conclusion
    • Chapter 191: Replace ORing Diodes with MOSFETs to Reduce Heatand Save Space
      • Abstract
      • Introduction
      • Ideal −48V ORing diode
      • Fault output detects damaged MOSFETs and fuses
      • Positive low voltage ideal diodes
      • Conclusion
    • Chapter 192: Dual Monolithic Ideal Diode Manages Multiple Power Inputs
      • Abstract
      • Introduction
      • Triple supply power management
      • Automatic switchover between a battery and a wall adapter with a battery charger
      • Conclusion
    • Chapter 193: PCMCIA Socket Voltage Switching
      • Abstract
      • Introduction
      • LTC1472: complete VCC and VPP PCMCIA switch matrix with SafeSlot protection
      • Conclusion
    • Chapter 194: PC Card Power Management Techniques
      • Abstract
  • Section 12: Battery Management
    • Chapter 195: Complete Battery Charger Solution for High Current PortableElectronics
      • Abstract
      • Introduction
      • Input multiplexer
      • Dual high current input application
      • 0V ∼ 6V input on either WALL or USB
      • >6V input on either WALL or USB
      • <0V input on either WALL or USB
      • OTG operation
      • Conclusion
    • Chapter 196: Battery Conditioner Extends the Life of Li-Ion Batteries
      • Abstract
      • Introduction
      • The underlying aging process in Li-Ion batteries
      • Conditions that affect the aging process
      • Battery conditioner avoids conditions that accelerate aging
      • Conclusion
    • Chapter 197: Simple Calibration Circuit Maximizes Accuracy in Li-Ion BatteryManagement Systems
      • Abstract
      • Introduction
      • Accounting for the error sources
      • Examining calibration strategies
      • Conclusion
    • Chapter 198: USB Power Solution Includes Switching Power Manager,Battery Charger, Three Synchronous Buck Regulators and LDO
      • Abstract
      • Introduction
      • Switching PowerPath controller maximizes available power to the system load
      • Complete power solution in a single IC
      • Conclusion
    • Chapter 199: Switching USB Power Manager with PowerPath Control OffersFastest Charge Time with Lowest Heat
      • Abstract
      • Introduction
      • PowerPath controllers deliver more power to the system load
      • LTC4088 makes charging more efficient
      • LTC4088 reduces USB charge time
      • LTC4088 eases thermal constraints
      • Conclusion
    • Chapter 200: Universal Li-Ion Battery Charger Operates from USB and6V to 36V Input in Just 2cm2
      • Abstract
      • Introduction
      • Adaptive high voltage buck minimizes total power loss
      • USB power manager maximizes power available to the system
      • Small footprint
      • Summary
    • Chapter 201: Handheld High Power Battery Charger
      • Abstract
      • Introduction
      • Small PCB footprint
      • Advanced features and functions
      • Flexible options
      • Conclusion
    • Chapter 202: Fast, High Efficiency, Standalone NiMH/NiCd Battery Charging
      • Abstract
      • Introduction
      • NiCd/NiMH battery charging basics
      • Complete 4-cell NiMH battery charger
      • Standalone charge termination
      • Conclusion
    • Chapter 203: Dual Smart Battery Charger Simplifi es Battery Backupfor Servers
      • Abstract
      • Introduction
      • LTC1760 dual smart battery charger
      • LTC1760 power management
    • Chapter 204: Advanced Topology USB Battery Charger Optimizes PowerUtilization for Faster Charging
      • Abstract
      • Benefits of the LTC4055
      • Simple circuit automatically selects the best power source
      • Operation with wall adapter present
      • Operation with no wall adapter, but USB available
      • Unplugged operation
      • Conclusion
    • Chapter 205: Simplify Battery Charging from the USB
      • Abstract
      • Introduction
      • Charging from USB or a wall adapter
      • Faster charging with system in full operation
    • Chapter 206: Li-Ion Linear Charger Allows Fast, Full Current Charging WhileLimiting PC Board Temperature to 85°C
      • Abstract
      • Introduction
      • Thermal feedback loop limits IC temperature
      • Charge cycle with thermal limit in operation
      • Thermally enhanced package dramatically improves power dissipation
      • Complete standalone charger
      • Conclusion
    • Chapter 207: Dual Battery Power Manager Increases Run Time by 12%and Cuts Charge Time in Half
      • Abstract
      • Introduction
      • Automatic current sharing
      • Simultaneous discharge increases run time
      • Faster charge times with a second battery
      • Automatic crisis power management
      • Conclusion
    • Chapter 208: Single Inductor, Tiny Buck-Boost Converter Provides 95%Efficiency in Lithium-Ion to 3.3V Applications
      • Abstract
      • Introduction
      • All ceramic capacitor, single inductor, 2W Li-Ion to 3.3V converter
      • WCDMA dynamically controlled power amp power supply
    • Chapter 209: Tiny Step-Up/Step-Down Power Supply Delivers 3.3V at 1.3A inBattery-Powered Devices
      • Abstract
      • Introduction
      • Regulated output voltage from a range of inputs
      • Highly efficient
    • Chapter 210: A Very Low Cost SOT-23 Li-Ion Battery Charger Requires LittleArea and Few Components
      • Abstract
      • A simple low cost Li-Ion charger
      • A programmable constant current source
    • Chapter 211: Simple Li-Ion Charge Termination Using the LT1505
      • Abstract
    • Chapter 212: Li-Ion Charge Termination IC Interfaces with PWM Switchers
      • Abstract
      • Battery pack protection
      • LT1510 battery charger IC
      • LTC1729 Li-Ion charge termination IC
      • Complete 2-cell Li-Ion charger
      • The charge cycle
      • Board layout and testing
    • Chapter 213: A Miniature, Low Dropout Battery Chargerfor Lithium-Ion Batteries
      • Abstract
      • Introduction
      • Operation and circuit description
      • Programming charge current
      • Typical application
      • Conclusion
    • Chapter 214: New Charger Topology Maximizes Battery Charging Speed
      • Abstract
      • Introduction
      • LT1511 battery charger IC
      • All surface mount lithium-ion charger
    • Chapter 215: Inexpensive Circuit Charges Lithium-Ion Cells
      • Abstract
      • Introduction
      • Circuit description
      • Other charging options
    • Chapter 216: Battery Backup Regulator is Glitch-Free and Low Dropout
      • Abstract
    • Chapter 217: Dual PowerPath controller simplifies power management
      • Abstract
      • Automatic switchover between battery and AC adapter
      • Power routing circuit for microprocessor controlled dual battery systems
    • Chapter 218: Low Dropout, Constant-Current/Constant-Voltage3A Battery Charger
      • Abstract
      • Introduction
      • Higher duty cycle for the LT1511 battery charger
      • Enhancing dropout voltage
    • Chapter 219: Fused Lead Battery Charger ICs Need No Heat Sinks
      • Abstract
    • Chapter 220: New Micropower, Low Dropout Regulators Ease Battery Supply Designs
      • Abstract
    • Chapter 221: The LT1304: Micropower DC/DC Converter with IndependentLow-Battery Detector
      • Abstract
      • A 2-cell to 5V converter
      • Super Burst Mode operation: 5V/80mA DC/DC with 15μA quiescent current
    • Chapter 222: High Efficiency Lithium-Ion Battery Charger
      • Abstract
      • Lithium-ion battery charger
      • Thermal calculations
    • Chapter 223: A 4-Cell Ni-Cad Regulator/Charger for Notebook Computers
      • Abstract
      • Quick charge battery charger
      • Extremely low voltage drop regulator
      • Very low power dissipation
      • Cost-effective and efficient power system
    • Chapter 224: Switching Regulator Allows Alkalines to Replace NiCads
      • Abstract
  • Section 13: Energy Harvesting & Solar Power Circuits
    • Chapter 225: Tiny 2-Cell Solar Panel Charges Batteries in Compact, Off-Grid Devices
      • Abstract
      • Introduction
      • The importance of maximum power point control
      • LTC3105 boost converter with input power control
      • Solar-powered Li-Ion battery charger
      • Conclusion
    • Chapter 226: Energy Harvester Produces Power from Local Environment, Eliminating Batteries in Wireless Sensors
      • Abstract
      • Introduction
      • Ambient energy sources
      • Application examples
      • Piezoelectric transducer application
      • Seebeck transducer application
      • Harvest energy from the EM field produced by standard fluorescent lights
      • Conclusions
  • Section 14: Charge Pump DC/DC Converter Design
    • Chapter 227: Step-Down Charge Pumps Are Tiny, Efficient and Very Low Noise
      • Abstract
      • Introduction
      • Efficient low noise fixed 1.5V output charge pump with ultrasmall footprint
      • Ultralow noise adjustable charge pump with spread spectrum operation
      • Versatility
      • Conclusion
    • Chapter 228: New Charge Pumps Offer Low Input and Output Noise
      • Abstract
      • Burst Mode operation vs constant frequency
      • Input noise reduction
      • Typical applications
    • Chapter 229: Step-Up/Step-Down DC/DC Conversion without Inductors
      • Abstract
      • Introduction
      • Regulator operation
      • Dual output supply from a 2.7V to 10V input
      • Conclusion
    • Chapter 230: Ultralow Quiescent Current DC/DC Converters for Light Load Applications
      • Abstract
      • 2-cell to 5V conversion with IQ = 12μA
      • Ultralow quiescent current (IQ < 5μA) regulated supply
      • Micropower LDO regulator consumes <5μA
  • Section 15: Flyback Converter Design
    • Chapter 231: Micropower Isolated Flyback Converter with Input Voltage Range from 6V to 100V
      • Abstract
      • Introduction
      • Simple and accurate primary-side voltage sensing
      • Very small size, low component count solution
      • Low IQ, small preload and high efficiency
      • Conclusion
    • Chapter 232: Flyback Controller Simplifies Design of Low Input Voltage DC/DC Converters
      • Abstract
      • Introduction
      • High efficiency controller capabilities
      • 3.3V, 10A converter operates from a 9V to 18V source
      • 3.3V, 10A converter operates from a 9V to 36V source
      • Conclusion
    • Chapter 233: Flyback Controller Improves Cross Regulation for Multiple Output Applications
      • Abstract
      • Introduction
      • Improved load and cross regulation
      • Efficiency
      • Composite feedback provides additional design flexibility
      • Conclusion
    • Chapter 234: No RSENSE Controller Is Small and Effi cient in Boost, Flyback and SEPIC Applications
      • Abstract
      • Introduction
      • A high efficiency 5V, 2A networking logic supply
      • A 2 square inch, 12V non-isolated flyback housekeeping supply for telecom applications
      • Programmable undervoltage lockout provides clean start-up and power-down
    • Chapter 235: Isolated Flyback Converter Regulates without an Optocoupler
      • Abstract
      • Introduction
      • The design criteria
      • Circuit description
      • Circuit operation
      • Conclusion
    • Chapter 236: Isolated DC/DC Conversion with the LT1425
      • Abstract
    • Chapter 237: Isolated Power Supplies for Local Area Networks
      • Abstract
      • Introduction
      • Circuit design
      • Transformer design
    • Chapter 238: A Battery Powered Lap Top Computer Power Supply
      • Abstract
  • Section 16: Supercapacitor Charging
    • Chapter 239: Supercapacitor-Based Power Backup System Protects Volatile Data in Handhelds when Power Is Lost
      • Abstract
      • Introduction
      • Backup power application
      • Conclusion
    • Chapter 240: Supercapacitor-Based Power Backup Prevents Data Loss in RAID Systems
      • Abstract
      • Introduction
      • Backup power applications
      • Design example
      • Conclusion
    • Chapter 241: Complete Energy Utilization Improves Run Time of a Supercap Ride-Through Application by 40%
      • Abstract
      • Introduction
      • Complete energy utilization maximizes run time of supercap ride-through application
      • 40% improvement in run time
      • How it works
      • Maximizing usage of the energy in the supercap
      • Conclusion
    • Chapter 242: Supercapacitors Can Replace a Backup Battery for Power Ride-Through Applications
      • Abstract
      • Introduction
      • Supercapacitor characteristics
      • Conclusion
  • Section 17: Current Source Design
    • Chapter 243: Convert Temperature to Current at High Linearity with LT3092 Current Source
      • Abstract
      • Electronics 101
      • A real 2-terminal current source
      • The LT3092 as a T-to-I converter
      • Conclusion
    • Chapter 244: Versatile Current Source Safely and Quickly Charges Everything from Large Capacitors to Batteries
      • Abstract
      • Introduction
      • Safe, small and flexible
      • Simple strobe capacitor charger
      • Charge small capacitors fast
      • Charge batteries too
      • Conclusion
  • Section 18: Hot Swap and Circuit Protection
    • Chapter 245: Protect Sensitive Circuits from Overvoltage and Reverse Supply Connections
      • Abstract
      • Introduction
      • Undervoltage, overvoltage and reverse supply protection
      • Accurate and fast overvoltage and undervoltage protection
      • Novel reverse supply protection
      • There’s more! AC blocking, reverse VIN Hot Swap control when VOUT is powered
      • Conclusion
    • Chapter 246: Simple Energy-Tripped Circuit Breaker with Automatic Delayed Retry
      • Abstract
      • Introduction
      • Higher currents permitted for shorter time intervals
      • A current-controlled delay interval
      • Extending the retry time interval
      • Conclusion
    • Chapter 247: Hot Swap Controller, MOSFET and Sense Resistor Are Integrated in a 5mm ՠ3mm DFN for Accurate Current Limit and Load CurrentMonitoring in Tight Spaces
      • Abstract
      • Introduction
      • LTC4217 features
      • Integrated MOSFET and sense resistor
      • Adjustable current limit
      • Voltage and current monitoring
      • Typical application
    • Chapter 248: Hot Swap Solution Meets AMC and MicroTCA Standards
      • Abstract
      • Introduction
      • Advanced mezzanine card application
      • Conclusion
    • Chapter 249: An Easy Way to Add Auxiliary Control Functions to Hot Swap Cards
      • Abstract
      • Introduction
      • Additional control
      • Conclusion
    • Chapter 250: Electronic Circuit Breaker in Small DFN Package Eliminates Sense Resistor
      • Abstract
      • Introduction
      • Overcurrent protection
      • Flexible overcurrent setting
      • Overvoltage protection
      • Typical electronic circuit breaker (ECB) application
      • Accurate ECB with sense resistor
      • High side switch for N-channel logic level MOSFET
      • Conclusion
    • Chapter 251: AdvancedTCA Hot Swap Controller Monitors Power Distribution
      • Abstract
      • Introduction
      • Circuit solutions
      • Cutting diode dissipation
      • Zero Volt Transient
    • Chapter 252: Protecting and Monitoring Hot Swappable Cards in High Availability Systems
      • Abstract
      • Introduction
      • Redundant power
      • Monitoring power through a Hot Swap controller
      • Adding fuse detection
      • Summary
    • Chapter 253: AdvancedTCA Hot Swap Controller Eases Power Distribution
      • Abstract
      • Introduction
      • Power requirements
      • Circuit solutions
      • Zero Volt Transient
      • Energy storage
      • Computing energy
    • Chapter 254: PCI Express Power and Mini Card Solutions
      • Abstract
      • Introduction
      • Power requirements
      • Circuit solutions
      • PCI Express Mini Card
    • Chapter 255: Low Voltage Hot Swap Controller Ignores Backplane Noise and Surges
      • Abstract
      • Control 25W with a 10-lead MS package
      • Dual level current control
      • Inrush limiting
      • Adaptive response to overloads
      • Recovery from faults
    • Chapter 256: Hot Swap Circuit Meets InfiniBand Specification
      • Abstract
    • Chapter 257: Hot Swap and Buffer I2C Buses
      • Abstract
      • Capacitance buffering and rise time accelerator features
      • Conclusion
    • Chapter 258: Power Supply Isolation Controller Simplifi es Hot Swapping the CompactPCI Bus for 5V-/3.3-Only Applications
      • Abstract
      • LTC1646 feature summary
      • Typical application
      • Power-up sequence
      • Conclusion
    • Chapter 259: A 24V/48V Hot Swap controller
      • Abstract
      • Typical application
      • Automatic restart
    • Chapter 260: Dual Channel Hot Swap Controller/Power Sequencer Allows Insertion Into a Live Backplane
      • Abstract
      • Basic operation
      • Power supply tracking and sequencing
      • Conclusion
    • Chapter 261: Hot Swapping the CompactPCI Bus
      • Abstract
      • LTC1643 feature summary
      • Typical application
      • Power-up sequence
      • Conclusion
    • Chapter 262: Power Solutions for the Device Bay
      • Abstract
      • Device Bay power requirements
      • Power solution for Vid_3.3V on the system side
      • Power solutions for DB32, DB20 and DB13 form factors on the device side
    • Chapter 263: Hot Swapping the PCI Bus
      • Abstract
      • Inrush current and data bus problems
      • Hot swappable PCI slot using the LTC1421
      • System timing
      • Conclusion
    • Chapter 264: Safe Hot Swapping Using the LTC1421
      • Abstract
      • Typical application
      • Board insertion timing
  • Section 19: Power over Ethernet
    • Chapter 265: Active Bridge Rectifiers Reduce Heat Dissipation within PoE Security Cameras
      • Abstract
      • Introduction
      • The old way loses power
      • Improve performance with ideal diodes
      • Results
      • Conclusion
    • Chapter 266: High Power PoE PD Interface with Integrated Flyback Controller
      • Abstract
      • Introduction
      • PD interface controller
      • Synchronous flyback controller
      • High efficiency, triple output, high power PD
      • PSE and auxiliary supplies
      • 2-pair vs 4-pair PD
      • Conclusion
    • Chapter 267: Simple Battery Circuit Extends Power over Ethernet (POE) Peak Current
      • Abstract
      • Introduction
      • The PoE circuit
      • PowerPath and charger circuit
      • High transient load or continuous current load operation
      • Optimization options
      • Conclusion
    • Chapter 268: Fully Autonomous IEEE 802.3af Power over Ethernet Midspan PSE Requires No Microcontroller
      • Abstract
      • Introduction
      • A PSE’s duties
      • Disconnect detection
      • Supplying 3.3V from −48V
      • LTC4259A options
    • Chapter 269: Power over Ethernet Isolated Power Supply Delivers 11.5W at 90% Effi ciency
      • Abstract
      • Conclusion
  • Section 20: System Monitoring and Control
    • Chapter 270: Pushbutton On/Off Controller with Failsafe Voltage Monitoring
      • Abstract
      • Introduction
      • Pushbutton challenges
      • Orderly power-on
      • Orderly power-off: short interrupt pulse
      • Failsafe features
      • Conclusion
    • Chapter 271: Versatile Voltage Monitors Simplify Detection of Overvoltage and Undervoltage Faults
      • Abstract
      • Introduction
      • Basic operation
      • Minimum fault length monitor
      • Conclusion
    • Chapter 272: Power Supply Sequencing Made Simple
      • Abstract
      • Introduction
      • Three phases of the power management cycle
      • LTC2928 configuration software designs it for you
      • Conclusion
    • Chapter 273: Pushbutton On/Off Controller Simplifi es System Design
      • Abstract
      • Introduction
      • De-bounces turn-on
      • Protect against faults at power-up
      • Controlled power-down
      • Operation without μP
      • High voltage, micropower
      • Conclusion
    • Chapter 274: Tracking and Sequencing Made Simple with Tiny Point-of-Load Circuit
      • Abstract
      • Introduction
      • Basic operation
      • Negative supply tracking
      • Conclusion
    • Chapter 275: Accurate Power Supply Sequencing Prevents System Damage
      • Abstract
      • Introduction
      • How it works
      • Conclusion
    • Chapter 276: Power Supply Tracker Can Also Margin Supplies
      • Abstract
      • Conclusion
    • Chapter 277: Dual Micropower Comparator with Integrated 400mV Reference Simplifies Monitor and Control Functions
      • Abstract
      • Introduction
      • “Gas gauge” battery monitor
      • Simple window-function status monitor
      • Micropower thermostat/temperature alarm
      • Conclusion
    • Chapter 278: Monitor network compliant −48V power supplies
      • Abstract
      • Introduction
      • Features
      • Application example
    • Chapter 279: Multiple Power Supplies Track During Power Up
      • Abstract
      • Introduction
      • Five supply voltage tracker circuit
      • Conclusion
    • Chapter 280: I2C Fan Control Ensures Continuous System Cooling
      • Abstract
      • Introduction
      • Continuous system cooling and tachometer monitoring
      • Additional features
    • Chapter 281: Monitor System Temperature and Multiple Supply Voltages and Currents
      • Abstract
      • Multitude of measurements
  • Section 21: Powering LED Lighting & Other Illumination Devices
    • Chapter 282: 60V, Synchronous Step-Down High Current LED Driver
      • Abstract
      • Introduction
      • 48V input to 35V output, 10A LED driver optimized for efficiency
      • 36V input to 20V output, 10A LED driver with fastest PWM dimming
      • Solar-powered battery charger
      • Conclusion
    • Chapter 283: 60V Buck-Boost Controller Drives High Power LEDs, Charges Batteries and Regulates Voltage with Up to 98.5% Effi ciency at 100W and Higher
      • Abstract
      • Introduction
      • Buck-boost controller drives 100W LED string for airplane and truck lights
      • 36V, 2.5A SLA battery charger
      • 120W, 6V to 55V voltage regulator
      • Conclusion
    • Chapter 284: Offline LED Lighting Simplifi ed: High Power Factor, Isolated LED Driver Needs No Opto-Isolators and is TRIAC Dimmer Compatible
      • Abstract
      • Introduction
      • No-opto operation
      • High power factor, low harmonics
      • TRIAC dimmer compatible
      • Open- and shorted-LED protection
      • CTRL pins and analog dimming
      • Conclusion
    • Chapter 285: Reduce the Cost and Complexity of Medium LCD LED Backlights with a Single Inductor LED Driver for 60 LEDs
      • Abstract
      • Introduction
      • Typical application
      • Need more current?
      • TSET pin for thermal protection
      • Channel disable capability
      • Conclusion
    • Chapter 286: 100V Controller Drives High Power LED Strings from Just about Any Input
      • Abstract
      • Introduction
      • Boost
      • Buck mode
      • Buck-boost mode
      • Conclusion
    • Chapter 287: Triple LED Driver in 4mm ՠ5mm QFN Supports LCD Backlights in Buck, Boost or Buck-Boost Modes and Delivers 3000:1 PWM Dimming Ratio
      • Abstract
      • Introduction
      • Integrated PMOS drivers improve PWM dimming ratio to 3000:1
      • Buck mode circuit drives three 500mA LED strings
      • Boost mode circuit drives three 200mA LED strings
      • Buck-boost mode circuit survives load dump events
      • Conclusion
    • Chapter 288: µModule LED Driver Integrates All Circuitry, Including the Inductor, in a Surface Mount Package
      • Abstract
      • Introduction
      • A superior LED driver
      • Easy to use
      • Rich feature set
      • Conclusion
    • Chapter 289: Versatile TFT LCD Bias Supply and White LED Driver in a 4mm ՠ4mm QFN
      • Abstract
      • Introduction
      • 3-output TFT supply with digitally dimmed LED backlight
      • Conclusion
    • Chapter 290: Tiny Universal LED Driver Can Gradate, Blink or Turn On Nine Individual LEDs with Minimal External Control
      • Abstract
      • Introduction
      • Blinking and gradation modes
      • Single IC drives cell phone backlight, new message/missed call/battery charger indicator, and RGB function select button
      • Control for cell phone backlight, vibrator motor and sound
      • Conclusion
    • Chapter 291: Drive Large TFT-LCD Displays with a Space-Saving Triple-Output Regulator
      • Abstract
      • Introduction
      • Conclusion
    • Chapter 292: Versatile High Power LED Driver Controller Simplifi es Design
      • Abstract
      • Introduction
      • Fully integrated, high power LED driver controller
      • LED dimming
      • Boost circuit
      • Buck-boost circuit
      • LED protection and other features
      • Conclusion
    • Chapter 293: High Voltage Buck Converters Drive High Power LEDs
      • Abstract
      • Introduction
      • Single buck 1A LED driver
      • Dual buck 1.5A LED driver
      • Conclusion
    • Chapter 294: Wide Input Range 1A LED Driver Powers High Brightness LEDs with Automotive and 12VAC Supplies
      • Abstract
      • Introduction
      • Automotive LED driver
      • Driving LEDs from 12VAC input
      • Thermal regulation
      • Conclusion
    • Chapter 295: Monolithic Converter Drives High Power LEDs
      • Abstract
      • Introduction
      • Boost driver
      • Buck driver
      • Buck-boost driver
      • Conclusion
    • Chapter 296: Quad Output Switching Converter Provides Power for Large TFT LCD Panels
      • Abstract
      • Introduction
      • 4-output supply with soft-start
      • Wide input range supply
      • Conclusion
    • Chapter 297: Basic Flashlamp Illumination Circuitry for Cellular Telephones/Cameras
      • Abstract
      • Introduction
      • Flashlamp circuitry
      • Conclusion
    • Chapter 298: DC/DC Converter Drives White LEDs from a Variety of Power Sources
      • Abstract
      • Introduction
      • Lithium-ion source (3.3V to 4.2V)
      • 2-alkaline cell source (1.8V to 3.0V)
      • Automotive power source (9V to 16V)
      • Conclusion
    • Chapter 299: High Efficiency ThinSOT White LED Driver Features Internal Switch and Schottky Diode
      • Abstract
      • Introduction
      • Li-Ion-powered driver for four white LEDs
      • Dimming control
      • Conclusion
    • Chapter 300: White LED Driver in Tiny SC70 Package Delivers High Efficiency and Uniform LED Brightness
      • Abstract
      • Introduction
      • Li-Ion-powered driver for three white LEDs
      • Easy dimming control
      • Conclusion
    • Chapter 301: Photofl ash Capacitor Charger Has Fast Efficient Charging and Low Battery Drain
      • Abstract
      • Introduction
      • Features
      • Interfacing to a microcontroller
      • Conclusion
    • Chapter 302: High Effi ciency White LED Driver Guarantees Matching LED Brightness
      • Abstract
      • Introduction
      • Li-Ion LED driver for four white LEDs
      • Dimming control
      • Conclusion
    • Chapter 303: High Power Desktop LCD Backlight Controller Supports Wide Dimming Ratios While Maximizing Lamp Lifetime
      • Abstract
      • Introduction
      • LT1768 dual CCFL backlight inverter
      • Multimode dimming
      • LT1768 fault modes
      • Additional features
    • Chapter 304: Tiny Regulators Drive White LED Backlights
      • Abstract
      • Introduction
      • Circuit descriptions
      • Brightness control
      • Summary
    • Chapter 305: High Power CCFL Backlight Inverter for Desktop LCD Displays
      • Abstract
    • Chapter 306: Low Input Voltage CCFL Power Supply
      • Abstract
    • Chapter 307: A Precision Wideband Current Probe for LCD Backlight Measurement
      • Abstract
      • Current probe circuitry
      • Current calibrator
    • Chapter 308: Floating CCFL with Dual Polarity Contrast
      • Abstract
  • Section 22: Automotive and Industrial Power Design
    • Chapter 309: Versatile Industrial Power Supply Takes High Voltage Input and Yields from Eight 1A to Two 4A Outputs
      • Abstract
      • Introduction
      • Configurable maximum output current
      • External VCC LDO and external input power supply start-up control
      • Unique power control and features
      • Conclusion
    • Chapter 310: 65V, 500mA Step-Down Converter Fits Easily into Automotive and Industrial Applications
      • Abstract
      • Introduction
      • 65V input, 500mA DC/DC converter with an adjustable output down to 800mV
      • 24V regulator with 300mA output current limit and input undervoltage lockout
      • Input current limit
      • Conclusion
    • Chapter 311: 2-Phase, Dual Output Synchronous Boost Converter Solves Thermal Problems in Harsh Environments
      • Abstract
      • Introduction
      • Advantages of synchronous rectification
      • Dual output automotive boost converter
      • Conclusion
    • Chapter 312: High Effi ciency USB Power Management System Safely Charges Li-Ion/Polymer Batteries from Automotive Supplies
      • Abstract
      • Introduction
      • Complete USB/battery charging solution for use in large transient environments
      • Overvoltage protection covers the entire battery charger/power manager system
      • Conclusion
    • Chapter 313: Low Profi le Synchronous, 2-Phase Boost Converter Produces 200W with 98% Effi ciency
      • Abstract
      • Introduction
      • A 24V output boost converter at 8.5A (continuous), 10.5A (peak) from a car battery
      • Performance results
      • Basic calculations and component selection
      • Conclusion
    • Chapter 314: 4-Phase Boost Converter Delivers 384W with no Heat Sink
      • Abstract
      • Introduction
      • 384W boost converter
      • Conclusion
    • Chapter 315: Power Monitor for Automotive and Telecom Applications Includes ADC and I2C Interface
      • Abstract
      • Introduction
      • Automotive power monitoring
      • Telecom power monitoring with PoE
      • Conclusion
    • Chapter 316: Direct Effi cient DC/DC Conversion of 100V Inputs for Telecom/Automotive Supplies
      • Abstract
      • Introduction
      • Feature-rich controller
      • High efficiency 36V–72V to 2.5V/6A power supply
    • Chapter 317: Monolithic Step-Down Regulator Withstands The Rigors of Automotive Environments and Consumes Only 100µA of Quiescent Current
      • Abstract
      • Introduction
      • Features of the LT3437
      • Brutal input transients
      • Low quiescent currents
      • Soft-start capability
      • Conclusion
    • Chapter 318: Monitor and Protect Automotive Systems with Integrated Current Sensing
      • Abstract
      • Introduction
      • Simple current monitoring solutions
      • Solving the H-bridge problem
      • Conclusion
  • Section 23: Video Design Solutions
    • Chapter 319: High Resolution Video Solutions Using Single 5V Power
      • Abstract
      • Introduction
      • High resolution video input-port multiplexer
      • High resolution single-supply cable driver
      • Economical SXGA/HD cable driver
      • Conclusion
    • Chapter 320: Pass HDMI Compliance Tests with Ease
      • Abstract
      • Introduction
      • LTC4300A-1 bus buffer
      • LTC4300A-3 level shifting buffer
      • Conclusion
    • Chapter 321: Video Difference Amplifi er Brings Versatility to Low Voltage Applications
      • Abstract
      • Introduction
      • Dual input pair zaps common mode noise pickup
      • Perform video rate analog arithmetic
      • Conclusions
    • Chapter 322: Video Signal Distribution Using Low Supply Voltage Amplifiers
      • Abstract
      • Introduction
      • Video signal characteristics
      • Amplifier considerations
      • Handling AC-coupled video signals
      • Conclusion
    • Chapter 323: Tiny RGB Video Multiplexer Switches Pixels at 100MHz
      • Abstract
      • Introduction
      • Expanding inputs does not increase power dissipation
      • Add your own logo
    • Chapter 324: An Adjustable Video Cable Equalizer
      • Abstract
    • Chapter 325: 4 ՠ4 Video Crosspoint Has 100MHz Bandwidth and 85dB Rejection at 10MHz
      • Abstract
      • 4 × 4 crosspoint
    • Chapter 326: Single 4-Input IC Gives Over 90dB Crosstalk Rejection at10MHz and is Expandable
      • Abstract
      • Introduction
      • Expanding the number of inputs
      • PC board layouts
      • Switching transients
    • Chapter 327: Send Color Video 1000 Feet Over Low Cost Twisted-Pair
      • Abstract
    • Chapter 328: Video Circuits Collection
      • Abstract
      • Introduction
      • Multiplex amplifiers
      • Loop through cable receivers
      • DC restore circuits
      • Fader circuits
    • Chapter 329: New Low Cost Differential Input Video Amplifi ers Simplify Designs and Improve Performance
      • Abstract
      • Wideband voltage controlled amplifier
      • Extending the input range on the LT1193
  • Part 2: Mixed Signal
    • Section 24: Data Conversion: Analog-to-Digital
    • Chapter 330: Generating a ±10.24V True Bipolar Input for an 18-Bit, 1Msps SAR ADC
      • Abstract
      • Introduction
      • Simple driver circuit
      • Layout is important
      • Conclusion
    • Chapter 331: Driving a Low Noise, Low Distortion 18-Bit, 1.6Msps ADC
      • Abstract
      • Introduction
      • Fully differential driver
      • Single supply driver
      • Layout considerations
      • Conclusion
    • Chapter 332: Driving Lessons for a Low Noise, Low Distortion, 16-Bit, 1Msps SAR ADC
      • Abstract
      • Introduction
      • Single-ended to differential converter
      • Fully differential drive
      • PCB layout
      • Conclusion
    • Chapter 333: Maximize the Performance of 16-Bit, 105Msps ADC with Careful IF Signal Chain Design
      • Abstract
      • Introduction
      • Signal chain topology
      • Conclusion
    • Chapter 334: Upgrade Your Microcontroller ADC to True 12-Bit Performance
      • Abstract
      • Introduction
      • Application circuits
      • Conclusion
    • Chapter 335: Digitize a $1000 Sensor with a $1 Analog-to-Digital Converter
      • Abstract
      • Introduction
      • Digitize an accurate sensor with an accurate ADC
      • Not so obvious features
      • Conclusion
    • Chapter 336: True Rail-to-Rail, High Input Impedance ADC Simplifies Precision Measurements
      • Abstract
      • Introduction
      • Solving common issues
      • Applications
      • Conclusion
    • Chapter 337: Easy Drive ADCs simplify measurement of high impedance sensors
      • Abstract
    • Chapter 338: Easy Drive delta-sigma analog-to-digital converters cancel input current errors
      • Abstract
      • Introduction
      • How does it work?
      • What is wrong with on-chip buffers?
      • Conclusion
    • Chapter 339: 16-Bit ADC Simplifi es Current Measurements
      • Abstract
      • Introduction
      • Data transfer
      • Data reception pseudocode
      • Power and analog inputs
      • Conclusion
    • Chapter 340: 12-Bit ADC with Sequencer Simplifi ers Multiple-Input Applications
      • Abstract
      • New ADC automatically converts multiple inputs with different spans at different rates
      • Writing and reading the sequencer
      • Running the sequencer
      • Conclusion
    • Chapter 341: A-to-D Converter Does Frequency Translation
      • Abstract
      • Down conversion with an ADC
    • Chapter 342: Resolving Very Small Temperature Differences with the LTC2402
      • Abstract
      • Platinum RTDs
      • Self-heating effects
      • Bridge connection of RTDs
      • Series connection of RTDs
      • Pulsed excitation
    • Chapter 343: 1- and 2-channel No Latency ΔΣ 24-bit ADCs easily digitize a variety of sensors, part 1
      • Abstract
      • Single-ended half-bridge digitizer with reference and ground sensing
      • Pseudo-differential applications
      • Noise rejection
    • Chapter 344: 1- and 2-channel No Latency ΔΣ 24-bit ADCs easily digitize a variety of sensors, part 2
      • Abstract
      • Introduction
      • Digital cold junction compensation
      • RTD temperature digitizer
      • Conclusion
    • Chapter 345: 24-Bit ADC Measures from DC to Daylight
      • Abstract
    • Chapter 346: LTC2400 High Accuracy Differential to Single-Ended Converter for ±5V Supplies
      • Abstract
      • Introduction
      • Operation
    • Chapter 347: Micropower MSOP 10-Bit ADC Samples at 500ksps
      • Abstract
      • Introduction
      • Features
      • Performance
      • Conclusion
    • Chapter 348: 16mW, Serial/Parallel 14-Bit ADC Samples at 200ksps
      • Abstract
      • Introduction
      • High performance without high power
      • Differential inputs with wideband CMRR
      • Single supply or dual supply operation
      • On-chip reference
      • Parallel or serial data output
      • Perfect for telecom: wide dynamic range
      • Conclusions
    • Chapter 349: 16-bit, 333ksps ADC achieves 90dB SINAD, −100dB THD and no missing codes
      • Abstract
      • Fastest 16-bit sampling ADC
      • Outstanding DC and AC performance
      • Differential inputs reject common mode noise
      • Applications
    • Chapter 350: New 16-Bit, 100ksps A/D Converter Runs on 5V Supply
      • Abstract
      • Product features
      • Circuit description
      • AC and DC performance
      • Applications
      • Conclusion
    • Chapter 351: New 14-Bit, 800ksps ADC Upgrades 12-Bit Systems with 81.5dB SINAD, 95dB SFDR
      • Abstract
      • Higher dynamic range ADCs
      • LTC1419 features
      • The LTC1410’s big brother
      • 10dB extra dynamic range for signal applications
      • Noise rejecting differential inputs
      • Other nice features
      • Time to upgrade?
    • Chapter 352: Micropower 4- and 8-Channel, 12-Bit ADCs Save Power and Space
      • Abstract
      • Introduction
      • Micropower ADCs in small packages
      • Conserve power with auto shutdown operation
      • Good DC performance
      • Versatile, flexible serial I/O
      • Latchup proof MUX inputs
      • Individual ADC and MUX chip selects enhance flexibility
      • MUXOUT/ADCIN economizes signal conditioning
      • Conclusion
    • Chapter 353: 1.25Msps, 12-Bit ADC Conserves Power and Signal Integrity on a Single 5V Supply
      • Abstract
      • Introduction
      • Benefits
    • Chapter 354: Micropower ADC and DAC in SO-8 Give PCs a 12-Bit Analog Interface
      • Abstract
      • Introduction
      • Small, micropower ADC and DAC
      • PC 2-channel analog I/O interface
      • Conclusion
    • Chapter 355: Micropower 12-Bit ADCs Shrink Board Space
      • Abstract
      • Introduction
      • Micropower and 12-bits in an SO-8 package
      • Resistive touchscreen interface
    • Chapter 356: 1.25Msps 12-Bit A/D Converter CutsPower Dissipation and Size
      • Abstract
      • Introduction
      • High accuracy conversions: AC or DC
      • Important multiplexed applications
      • Ideal for telecommunications
      • Differential inputs reject noise
      • Low power applications
      • Conclusion
    • Chapter 357: 500ksps and 600ksps ADCs Match Needs of High Speed Applications
      • Abstract
      • Introduction
      • High speed ADC family members
      • Important applications
      • Conclusion
    • Chapter 358: New 5V and 3V, 12-Bit ADCs Sample at 300kHz on 75mW and 140kHz on 12mW
      • Abstract
      • Complete ADCs provide lowest power and highest speed on single or dual supplies
      • 5V ADCs sample at 300kHz on 75mW of power
      • Even more power savings: 3V ADC samples at 140kHz on 12mW
      • Conclusion
    • Chapter 359: The LTC1096 and LTC1098: Micropower, SO-8, 8-Bit ADCs Sample at 1kHz on 3µA of Supply Current
      • Abstract
      • Two micropower ADCs
      • Longer battery life
      • A/D conversion for 3V systems
      • Smaller instrument size
      • AC and DC performance
      • Conclusion
  • Section 25: Data Conversion: Digital-to-Analog
    • Chapter 360: 12-bit DAC in TSOT-23 Includes Bidirectional REF Pin for Connection to Op Amp or External High Precision Reference
      • Abstract
      • Introduction
      • Applications using REF pin
      • Conclusion
    • Chapter 361: Highly Integrated Quad 16-Bit, SoftSpanTM, Voltage Output DAC for Industrial and Control Applications
      • Abstract
      • Introduction
      • Unprecedented integration
      • Ease of use
      • Example circuits
      • Conclusion
    • Chapter 362: Multiple Output Range 16-Bit DAC Design Made Simple
      • Abstract
      • Introduction
      • The old way
      • The new, easy way
      • Conclusion
    • Chapter 363: Selecting Op Amps for Precision 16-Bit DACs
      • Abstract
    • Chapter 364: The LTC1590: Applications Versatility of Dual 12-Bit DAC
      • Abstract
      • Introduction
      • Applications
    • Chapter 365: First dual 12-bit DACs in SO-8
      • Abstract
      • Low power 5V or 3V single supply
      • Complete standalone performance
      • Rail-to-rail outputs
      • A wide range of applications
      • Conclusion
    • Chapter 366: 3V and 5V 12-Bit Rail-to-Rail Micropower DACs Combine Flexibility and Performance
      • Abstract
      • Low power, 5V or 3V single supply operation
      • Flexibility with standalone performance
      • 4-quadrant multiplying DAC application
    • Chapter 367: 12-Bit Rail-to-Rail Micropower DACs in an SO-8
      • Abstract
      • 5V and 3V operation
      • True rail-to-rail output
      • Wide range of applications
      • Flexibility, true rail-to-rail performance and micropower; all in a tiny SO-8
  • Section 26: Data Acquisition
    • Chapter 368: 16-Channel, 24-Bit ?S ADC Provides Small, Flexible and Accurate Solutions for Data Acquisition
      • Abstract
      • Introduction
      • Noise reduction
      • Conclusion
    • Chapter 369: A Versatile 8-Channel Multiplexer
      • Abstract
      • Introduction
      • Low power, daisy-chain serial interface, 8-channel A/D system
      • Conclusion
    • Chapter 370: Temperature and Voltage Measurement in a Single Chip
      • Abstract
      • Introduction
      • Measurement performance
      • Typical application
      • Conclusion
    • Chapter 371: Applications for a New Micropower, Low Charge Injection Analog Switch
      • Abstract
      • Micropower V-F converter
      • Precision voltage doubler
      • Quad 12-bit sample and hold
    • Chapter 372: 12-Bit 8-Channel Data Acquisition System Interfaces to IBM PC Serial Port
      • Abstract
      • IBM PCs collect analog data
      • Two glue chips provide the interface
      • A few lines of BASIC read the data
      • Summary
    • Chapter 373: Auto-Zeroing A/D Offset Voltage
      • Abstract
      • Introduction
      • Circuit description
    • Chapter 374: Complex Data Acquisition System Uses Few Components
      • Abstract
      • Introduction
      • Implementation
      • Filter design specifications and test results
      • System considerations
      • Conclusion
    • Chapter 375: A Two Wire Isolated and Powered 10-Bit Data Acquisition Sytem
      • Abstract
      • Introduction
      • Circuit description
      • Summary
    • Chapter 376: Closed Loop Control with Data Acquisition Systems
      • Abstract
      • Introduction
      • Circuit description
      • Summary
    • Chapter 377: Electrically Isolating Data Acquisition Systems
      • Abstract
      • Introduction
      • Circuit description
      • Alternatives
      • Summary
    • Chapter 378: Temperature Measurement Using Data Acquisition Systems
      • Abstract
      • Introduction
      • Thermocouple systems
      • Thermilinear networks
      • Thermistors
      • Silicon sensors
    • Chapter 379: Sampling of Signals for Digital Filtering and Gated Measurements
      • Abstract
      • Introduction
      • The LTC1090 sample and hold
      • 8-channel data acquisition system with digital filter
      • 4th order elliptic filter
      • Gated measurements of fast signals
    • Chapter 380: Data Acquisition Systems Communicate with Microprocessors Over 4 Wires
      • Abstract
      • The LTC1090 family
      • Advantages of serial communications
      • Speed is usually limited by the MPU
      • Talking to serial port MPUs
      • Talking to MPUs without serial ports
      • Sharing the serial interface
      • Conclusion
  • Section 27: Communications Interface Design
    • Chapter 381: Addressable I2C Bus Buffer Provides Capacitance Buffering, Live Insertion and Nested Addressing in 2-Wire Bus Systems
      • Abstract
      • Introduction
      • Live insertion and removal and capacitance buffering application
      • Nested addressing and 5V to 3.3V level translator application
    • Chapter 382: Single Interface Chip Controls Two Smart Cards
      • Abstract
      • Introduction
      • Features
      • Ease of use
      • Conclusion
    • Chapter 383: Isolated RS485 Transceiver Breaks Ground Loops
      • Abstract
    • Chapter 384: RS485 Transceivers Sustain ±60V Faults
      • Abstract
      • Introduction
      • Up to ±60V faults
      • 128-node networks at 250kBd
      • Extending protection beyond ±60V
    • Chapter 385: SMBus Accelerator Improves Data Integrity
      • Abstract
      • Introduction
      • The solution
      • Making the upgrade
    • Chapter 386: Providing power for the IEEE1394 “FireWire”
      • Abstract
    • Chapter 387: LTC1387: 5V RS232/RS485 Multiprotocol Transceiver
      • Abstract
      • Introduction
      • RS232 and RS485 interfaces
      • Key features
      • Conclusion
    • Chapter 388: 10Mbps Multiple Protocol Serial Chip Set: Net1 and Net2 Compliance by Design
      • Abstract
      • Introduction
      • Review of interface standards
      • Typical application
    • Chapter 389: RS485 Transceivers Operate at 52Mbps Over 100 Feet of Unshielded Twisted Pair
      • Abstract
      • High speed differential SCSI (fast-20/fast-40 HVD)
      • Transmission over long distances
      • 1Mbps over 12,000 feet using repeaters
      • 1.6Mbps over 8000 feet using repeaters
      • Conclusion
    • Chapter 390: The “smart rock”: a micropower transponder
      • Abstract
      • Introduction
      • The micropower subcircuits
      • The smart rock system
      • Conclusion
    • Chapter 391: Power Supplies for Subscriber Line Interface Circuits
      • Abstract
      • Circuit descriptions
      • Layout and thermal considerations
      • Bill of materials
    • Chapter 392: Precision Receiver Delay Improves Data Transmission
      • Abstract
      • Circuit description
      • Additional features
      • Applications
    • Chapter 393: RS485 Transceivers Reduce Power and EMI
      • Abstract
      • LTC1481
      • LTC1483
      • LTC1487
      • Conclusions
    • Chapter 394: Interfacing to V.35 Networks
      • Abstract
      • What is V.35?
      • Problems with traditional implementations
      • LTC1345
      • Complete V.35 port
    • Chapter 395: ESD Testing for RS232 Interface Circuits
      • Abstract
      • ESD transients during powered operation
    • Chapter 396: RS232 Interface Circuits for 3.3V Systems
      • Abstract
      • VPP switcher drives 3V RS232
      • ESD protection
    • Chapter 397: RS232 Transceivers for Hand Held Computers Withstand 10kV ESD
      • Abstract
      • Interfacing with 3V logic
      • ESD protection techniques
      • PC board layout
      • Conclusion
    • Chapter 398: Low Power CMOS RS485 Transceiver
      • Abstract
      • Introduction
      • Proprietary output stage
      • Propagation delay
      • LTC485 line length vs data rate
    • Chapter 399: Active Termination for SCSI-2 Bus
      • Abstract
      • Overview of SCSI-2
      • Shortcomings of passive terminators
      • Active terminators
    • Chapter 400: RS232 Transceiver with Automatic Power Shutdown Control
      • Abstract
    • Chapter 401: A Single Supply RS232 Interface for Bipolar A to D Converters
      • Abstract
    • Chapter 402: Design Considerations for RS-232 Interfaces
      • Abstract
      • Introduction
      • Power supply generators
      • Load driving
      • Fault conditions
      • Isolated transceiver
    • Chapter 403: New 12-Bit Data Acquisition Systems Communicate with Microprocessors Over 4 Wires
      • Abstract
      • The LTC1290 family
      • Speed is usually limited by the MPU
      • Talking to serial port MPUs
      • Talking to MPUs without serial ports
      • Sharing the serial interface
      • Conclusions
    • Chapter 404: Extending the Applications of 5V Powered RS232 Transceivers
      • Abstract
      • High speed operation
      • Power supply tricks
      • Operation with +5V and +12V supplies
    • Chapter 405: New Developments in RS232 Interfaces
      • Abstract
  • Section 28: Instrumentation Design
    • Chapter 406: System Monitor with Instrumentation-Grade Accuracy Used to Measure Relative Humidity
      • Abstract
      • A psychrometer: not nearly as ominous as it sounds
      • Error budget
      • Try it out!
    • Chapter 407: 6-Channel SAR ADCs for Industrial Monitoring and Portable Instruments
      • Abstract
      • Power line monitoring application
      • Conclusion
    • Chapter 408: New Instrumentation Amplifi ers Maximize Output Swing on Low Voltage Supplies
      • Abstract
      • Introduction
      • A clearer picture of the problem
      • The solutions
      • The LTC6800 solution
    • Chapter 409: Ultraprecise Instrumentation Amplifi er Makes Robust Thermocouple Interface
      • Abstract
      • Introduction
      • The requirements of thermocouple amplification
      • A battery-powered thermocouple amplifier
      • Filtering and protection
    • Chapter 410: New 16-Bit SO-8 DAC Has 1LSB (Max) INL and DNL Over Industrial Temperature Range
      • Abstract
      • Nice features of the 16-bit DACs
      • 16-bit accuracy over temperature without autocalibration
      • Ultralow 1nV-s glitch
      • Precision 0V to10V outputs with one op amp
      • Precision ±10V outputs with a dual op amp
    • Chapter 411: Gain Trimming In Instrumentation Amplifier Based Systems
      • Abstract
    • Chapter 412: Signal Conditioning for Platinum Temperature Transducers
      • Abstract
    • Chapter 413: Designing with a New Family of Instrumental Amplifiers
      • Abstract
  • Part 3: Signal Conditioning
    • Section 29: Operational Amplifier Design Techniques
    • Chapter 414: High Voltage CMOS Amplifier Enables High Impedance Sensing with a Single IC
      • Abstract
      • Introduction
      • The LTC6090 easily solves high voltage sensing problems
      • Accurate 50.00V reference
      • Simple large-signal buffer
      • Conclusion
    • Chapter 415: Matched Resistor Networks for Precision Amplifier Applications
      • Abstract
      • Introduction
      • Common mode rejection ratio
      • Harmonic distortion
      • Stability
      • Conclusion
    • Chapter 416: Using a Differential I/O Amplifier in Single-Ended Applications
      • Abstract
      • Introduction
      • Background
      • Simple single-ended connection of a fully differential op amp
      • A single-ended transimpedance amplifier
      • Conclusion
    • Chapter 417: Single-Ended to Differential Amplifier Design Tips
      • Abstract
      • Introduction
      • Input impedance matching
      • The DC-coupled differential amplifier
    • Chapter 418: Current sense amp inputs work from −0.3V to 44V independent of supply
      • Abstract
      • Introduction
      • Solenoid monitoring
      • Supply monitoring
      • Conclusion
    • Chapter 419: Tiny Amplifi ers Drive Heavy Capacitive Loads at Speed
      • Abstract
      • Introduction
      • Demanding circuit requirements
      • Tiny current feedback amplifiers
      • Component selection and testing
      • Conclusion
    • Chapter 420: Micropower Op Amps Work Down to 1.8V Total Supply, Guaranteed over Temperature
      • Abstract
      • Introduction
      • NiMH and alkaline
      • Supply friendliness
      • Portable gas sensor
      • Conclusion
    • Chapter 421: Low Noise Amplifi ers for Small and Large Area Photodiodes
      • Abstract
      • Introduction
      • Small area photodiode amplifiers
      • Large area photodiode amplifiers
    • Chapter 422: Op Amp Selection Guide for Optimum Noise Performance
      • Abstract
      • Introduction
      • Quantifying resistor thermal noise and op amp noise
      • Summing the noise sources
      • Selecting the best op amps
      • Conclusion
    • Chapter 423: Easy-to-Use Differential Amplifiers Simplify Balanced Signal Designs
      • Abstract
      • Introduction
      • Easy-to-use circuit topology
      • Common mode range considerations
      • Common mode input range extension
      • Versatile functional block
      • Conclusion
    • Chapter 424: Dual 25µV Micropower Op Amp Fits in 3mm ՠ3mm Package
      • Abstract
      • Introduction
      • Hall sensor amplifier
      • DAC amplifier
    • Chapter 425: 100MHz Op Amp Features Low Noise Rail-to-Rail Performance While Consuming Only 2.5mA
      • Abstract
      • Low power, 2.4nVHz, photodiode AC transimpedance amplifier outperforms monolithic solutions
      • Single supply 16-bit ADC driver
      • Conclusion
    • Chapter 426: High Performance Op Amps Deliver Precision Waveform Synthesis
      • Abstract
      • Introduction
      • The LT1722, LT1723 and LT1724 low noise amplifiers
      • DAC output amplifier
      • Conclusion
    • Chapter 427: Power Op Amp Provides On-the-Fly Adjustable Current Limit for Flexibility and Load Protection in High Current Applications
      • Abstract
      • Introduction
      • Introducing the LT1970
      • Boosted output current with “snap-back” current limiting
      • Conclusion
    • Chapter 428: Fast and Accurate 80MHz Amplifi er Draws Only 2mA
      • Abstract
      • Introduction
      • Single supply 1A laser driver
      • Low power amplifier with 250V output swing
      • Conclusion
    • Chapter 429: SOT-23 Superbeta Op Amp Saves Board Space in Precision Applications
      • Abstract
      • Introduction
      • Applications
      • Conclusion
    • Chapter 430: 325MHz Low Noise Rail-to-Rail SOT-23 Op Amp Saves Board Space
      • Abstract
      • 1MΩ transimpedance amplifier achieves near theoretical noise performance with large-area photodiodes
      • Conclusion
    • Chapter 431: Fast Op Amps Operate Rail-to-Rail on 2.7V
      • Abstract
      • Parallel composite amplifier achieves low distortion into heavy loads
      • Rail-to-rail pulse-width modulator using the LT1809
    • Chapter 432: Rail-to-Rail Amplfi iers Operate on 2.7V with 20µV Offset
      • Abstract
      • Remote 2-wire geophone preamp using the low noise LT1677
      • Difference amplifier using the LT1884: ±42V CM input range on a single 5V supply without sacrificing differential gain
    • Chapter 433: The LT1167: Single Resistor Sets the Gain of the Best Instrumentation Amplifier
      • Abstract
      • Introduction
      • Low input bias current and noise voltage
      • Input protection
      • ADC signal conditioning
      • Current source
    • Chapter 434: Maximize Dynamic Range with the LT1466L Micropower Rail-to-Rail Op Amp
      • Abstract
      • Variable current source
      • High side current sense amplifier
      • 3.3V, 1kHz, 4th order Butterworth filter
      • Picoampere input current instrumentation amplifier
    • Chapter 435: 1µA Op Amp Permits Precision Portable Circuitry
      • Abstract
      • 5.5μA, 0.05μV/°C chopped amplifier
      • 0.03% linear V/F converter with 13μA power drain
      • Portable reference
    • Chapter 436: Low Power, Fast Op Amps Have Low Distortion
      • Abstract
      • Introduction
      • Buffering data acquisition systems
      • Filters
      • A two op amp instrumentation amplifier
      • Conclusion
    • Chapter 437: Operational Amplifi er Selection Guide for Optimum Noise Performance
      • Abstract
    • Chapter 438: Micropower dual and quad JFET op amps feature pA input bias currents and C-Load drive capability
      • Abstract
      • Introduction
      • Driving large capacitive loads
      • Applications
    • Chapter 439: Fast Current Feedback Amplifers Tame Low Impedance Loads
      • Abstract
      • Introduction
      • Driving transformer-coupled loads
      • Driving capacitive loads
    • Chapter 440: C-Load op amps conquer instabilities
      • Abstract
      • Introduction
      • Driving ADCs
      • Remaining stable in the face of difficult loads
      • Conclusion
    • Chapter 441: Applications of a Rail-to-Rail Amplifier
      • Abstract
      • Precision low dropout regulator
      • Single supply, 1kHz, 4th order Butterworth filter
      • Buffering A/D converters
    • Chapter 442: Source Resistance Induced Distortion in Op Amps
      • Abstract
      • Introduction
      • Test circuit
      • Results
    • Chapter 443: C-Load op amps tame instabilities
      • Abstract
      • Introduction
      • The problem
      • An example
      • The solution
      • Conclusions
    • Chapter 444: A Broadband Random Noise Generator
      • Abstract
    • Chapter 445: Peak Detectors Gain in Speed and Performance
      • Abstract
      • Introduction
      • Detecting sine waves
      • Detecting pulses
    • Chapter 446: 3V Operation of Linear Technology Op Amps
      • Abstract
    • Chapter 447: High Frequency Amplifi er Evaluation Board
      • Abstract
      • Introduction
      • High speed layout techniques
      • Optional components
      • Supply bypass capacitors
    • Chapter 448: Current feedback amplifier “dos and don’ts”
      • Abstract
      • Introduction
    • Chapter 449: LT1056 Improved JFET Op Amp Macromodel Slews Asymmetrically
      • Abstract
    • Chapter 450: Chopper vs bipolar op amps—an unbiased comparison
      • Abstract
    • Chapter 451: Ultra Low Noise Op Amp Combines Chopper and Bipolar Op Amps
      • Abstract
      • Noise measurements
    • Chapter 452: A SPICE Op Amp Macromodel for the LT1012
      • Abstract
      • Introduction
      • The LT1012
      • The LT1012 macromodel
      • Obtaining this macromodel
    • Chapter 453: A Single Amplifi er, Precision High Voltage Instrument Amp
      • Abstract
    • Chapter 454: Micropower, Single Supply Applications:(1) A Self-Biased, Buffered Reference(2) Megaohm Input Impedance Difference Amplifier
      • Abstract
      • A self-biased, buffered reference
      • Megaohm input impedance difference amplifier
    • Chapter 455: Noise Calculations in Op Amp Circuits
      • Abstract
      • Instructions for operating NOISE
    • Chapter 456: An Op Amp SPICE Macromodel
      • Abstract
    • Chapter 457: Operational Amplifi er Selection Guide for Optimum Noise Performance
      • Abstract
  • Section 30: Special Function Amplifier Design
    • Chapter 458: Ultraprecise Current Sense Amplifi er Dramatically Enhances Efficiency and Dynamic Range
      • Abstract
      • Introduction
      • Precision buys efficiency
      • Print your own sense resistors
      • Design tips and details
      • Conclusion
    • Chapter 459: Dual Current-Sense Amplifi ers Simplify H-Bridge Load Monitoring
      • Abstract
      • Introduction
      • Measuring load current in the H-bridge
      • The simple solution
      • Conclusion
    • Chapter 460: Precise Gain Without External Resistors
      • Abstract
      • Introduction
      • The resistors: 0.04% worst case
      • The op amp: precision, micropower
      • So easy to use
      • Battery monitor circuit
      • Conclusion
    • Chapter 461: Sense Milliamps to Kiloamps and Digitize to 12 Bits
      • Abstract
      • Introduction
      • Operation with an A/D converter
      • Conclusion
    • Chapter 462: Op Amp, Comparator and Reference IC Provides Micropower Monitoring Capability
      • Abstract
      • Introduction
      • Pilot light flame detector with low-battery lockout
      • Tip-acceleration detector for shipping containers
  • Section 31: Voltage Reference Design
    • Chapter 463: Versatile Micropower Voltage Reference Provides Resistor Programmable Output from 0.4V to 18V
      • Abstract
      • Introduction
      • Easy output voltage programming
      • Create a virtual ground for unipolar processing of bidirectional signals
      • Shunt mode operation works like precision zener diode
      • Conclusion
    • Chapter 464: Don’t be fooled by voltage reference long-term drift and hysteresis
      • Abstract
      • Lies about long-term drift
      • Competitive reference measures 500 times worse than claimed
      • Hysteresis limits repeatability
      • Hysteresis—often the “missing” spec
      • Conclusion
    • Chapter 465: Voltage References Are Smaller and More Precise
      • Abstract
      • Introduction
      • Longer battery life with precision
      • The small fry
      • Higher performance, industrial temperature range and surface mount
  • Section 32: Filter Design
    • Chapter 466: A Precision Active Filter Block with Repeatable Performance to 10MHz
      • Abstract
      • Introduction
      • Device description
      • Application examples
      • A 4th order elliptic lowpass filter
      • A 4th order bandpass filter
      • Conclusion
    • Chapter 467: High Frequency Active Antialiasing Filters
      • Abstract
      • Introduction
      • The LT6600-10 lowpass filter
      • An LT1819-based RC lowpass filter
      • Anti-aliasing 10MHz filters for a differential 50Msps ADC
      • Conclusion
    • Chapter 468: Design Low Noise Differential Circuits Using the LT1567 Dual Amplifi er Building Block
      • Abstract
      • Introduction
      • A single-ended to differential amplifier
      • A differential buffer/driver
      • A differential to single-ended amplifier
      • LT1567 free design software
      • Conclusion
    • Chapter 469: LTC1564: A Digitally Tuned Antialiasing/Reconstruction Filter Simplifi es High Performance DSP Design
      • Abstract
      • Introduction
      • Filtering performance and operation
      • Application example: 2-chip “universal” DSP front end
      • Conclusion
    • Chapter 470: Replace Discrete Lowpass Filters with the LTC1563 Zero Design Effort, Two Item BoM and No Surprises
      • Abstract
      • Lowpass filters—the traditional approach
      • Lowpass filters—the LTC1563 approach
      • Easy design without sacrificing performance
      • Also included, Chebyshev filters with gain
      • Conclusion
    • Chapter 471: Free FilterCAD 3.0 Software Designs Filters Quickly and Easily
      • Abstract
      • Linear phase lowpass filters
      • Example 1: design a 256kHz linear phase lowpass filter for a single 5V power supply
      • Example 2: design a 10kHz low power linear phase lowpass filter for a single 3V power supply
      • Example 3: design a 650kHz linear phase lowpass filter for a single 5V power supply
    • Chapter 472: SOT-23 Micropower, Rail-to-Rail Op Amps Operate with Inputs Above the Positive Supply
      • Abstract
      • Introduction
      • Tough general purpose op amps
      • Tough op amps
      • Read all of the specs
      • Over-the-top applications
    • Chapter 473: Get 100dB Stopband Attenuation with the LTC1562 Universal Filter Family
      • Abstract
    • Chapter 474: LTC1560-1: Tiny 1MHz Lowpass Filter Uses No Inductors
      • Abstract
      • Frequency and time-domain response
      • DC accuracy
      • Conclusion
    • Chapter 475: A Family of 8th Order Monolithic Filters in an SO-8 Package
      • Abstract
      • LTC1069-1: low power elliptic anti-aliasing filter works from single 3.3V to ±5V supplies
      • LTC1069-6: 8th order elliptic lowpass works on single 3V, consumes 1mA
      • LTC1069-7: linear-phase communication filter delivers up to 200kHz cutoff frequency and symmetrical impulse response
      • Conclusion
    • Chapter 476: A 1mV Offset, Clock-Tunable, Monolithic 5-Pole Lowpass Filter
      • Abstract
      • Using the filter’s internal oscillator
      • DC performance
      • Dynamic range
    • Chapter 477: High Dynamic Range Bandpass Filters for Communications
      • Abstract
      • Introduction
      • Design
      • Test results
      • Conclusions
    • Chapter 478: Switched-Capacitor Low Pass Filters for Anti-Aliasing Applications
      • Abstract
      • Introduction
      • Comparing the LTC1064-1 with RC active filters utilizing operational amplifiers
      • Summary
    • Chapter 479: Chopper Amplifi ers Complement a DC Accurate Low-Pass Filter
      • Abstract
    • Chapter 480: DC Accurate Filter Eases PLL Design
      • Abstract
  • Section 33: Comparator Design Techniques
    • Chapter 481: Rail-to-Rail I/O and 2.4V Operation Allow UltraFast Comparators to be Used on Low Voltage Supplies
      • Abstract
      • Simultaneous full duplex 75MBd interface with only two wires
      • 1MHz series resonant crystal oscillator with square and sinusoid outputs
    • Chapter 482: A Seven Nanosecond Comparator for Single-Supply Operation
      • Abstract
      • The LT1394—an overview
      • 4 × NTSC subcarrier tunable crystal oscillator
      • High speed adaptive trigger circuit
    • Chapter 483: New Comparators Feature Micropower Operation Under All Conditions
      • Abstract
    • Chapter 484: Ultralow Power Comparators Include Reference
      • Abstract
      • Voltage reference
      • Undervoltage/overvoltage detector
      • Single cell lithium-ion battery supply
  • Section 34: System Timing Design
    • Chapter 485: Using the LTC6900 Low Power SOT-23 Oscillator as a VCO
      • Abstract
      • Introduction
      • Programming the output frequency
    • Chapter 486: SOT-23 1kHz to 30MHz Oscillator with Single Resistor Frequency Set
      • Abstract
      • Tiny circuit, big performance
      • Fast start-up time
      • Two-step design process
      • Application: temperature-to-frequency converter
      • Conclusion
  • Section 35: RMS to DC Conversion
    • Chapter 487: Precision LVDT Signal Conditioning Using Direct RMS to DC Conversion
      • Abstract
      • Introduction
      • LVDT operation
      • Circuit description
      • Circuit calibration
      • Conclusion
    • Chapter 488: An Autoranging True RMS Converter
      • Abstract
      • Introduction
      • Autoranging expands input dynamic range
      • Circuit description
      • Conclusion
    • Chapter 489: RMS-to-DC Conversion Just Got Easy
      • Abstract
      • Introduction
      • Ease of use
      • The trouble with log-antilog
      • How the LTC1966 RMS to DC converter works
      • Summary
  • Part 4: Wireless, RF & Communications Design
    • Chapter 490: High Input IP3 Mixer Enables Robust VHF Receivers
      • Abstract
      • Introduction
      • Impedance match design
      • Conclusion
    • Chapter 491: A Robust 10MHz Reference Clock Input Protection Circuit and Distributor for RF Systems
      • Abstract
      • Introduction
      • Design requirements
      • Design implementation
      • Performance
      • Conclusion
    • Chapter 492: A Low Power, Direct-to-Digital IF Receiver with Variable Gain
      • Abstract
      • Introduction
      • IF receiver performance
      • Measurement details and receiver circuit
      • Conclusion
    • Chapter 493: Fast Time Division Duplex (TDD) Transmission Using an Upconverting Mixer with a High Side Switch
      • Abstract
      • Introduction
      • High side VCC switch for a burst mode transmitter using the LT5579 mixer
      • Conclusion
    • Chapter 494: Precision, Matched, Baseband Filter ICs Outperform Discrete Implementations
      • Abstract
      • Introduction
      • The LTC6601-x lowpass filter
      • The LTC6605-x, dual, matched, lowpass filter
      • Conclusion
    • Chapter 495: A Complete Compact APD Bias Solution for a 10Gbits/s GPON System
      • Abstract
      • Introduction
      • An APD bias topology with fast current monitor transient response
      • Conclusion
    • Chapter 496: Signal Chain Noise Analysis for RF-to-Digital Receivers
      • Abstract
      • Introduction
      • NF to SNR: how much ADC resolution?
      • SNR to NF
      • Conclusion
    • Chapter 497: Programmable Baseband Filter for Software-Defined UHF RFID Readers
      • Abstract
      • Introduction
      • The LTC6602 dual bandpass filter
      • An adaptable baseband filter for an RFID reader
      • Conclusion
    • Chapter 498: High Linearity Components Simplify Direct Conversion Receiver Designs
      • Abstract
      • Introduction
      • The right components for the job
      • A basic receiver design
      • Adding free gain to the system
      • A more selective filter
      • Conclusion
    • Chapter 499: Baseband Circuits for an RFID Receiver
      • Abstract
      • Introduction
      • A direct conversion receiver
      • A low noise differential to single-ended amplifier
      • A matched I and Q filter and a dual ADC
      • Conclusion
    • Chapter 500: WCDMA ACPR and AltCPR Measurements
      • Abstract
      • Introduction
    • Chapter 501: Low Distortion, Low Noise Differential Amplifi er Drives High Speed ADCs in Demanding Communications Transceivers
      • Abstract
      • Introduction
      • LT1993-x features
      • High speed ADC driving
      • WCDMA amplifier and ADC driver
      • Conclusion
    • Chapter 502: Wideband RF ICs for Power Detection and Control
      • Abstract
      • Introduction
      • A dual band mobile phone transmitter power control application
      • An RFID reader application
      • Application of RF power detectors at frequencies above 7GHz
    • Chapter 503: Fiber Optic Communication Systems Benefi t from Tiny, Low Noise Avalanche Photodiode Bias Supply
      • Abstract
      • Conclusion
    • Chapter 504: ADSL Modems That Use the LT1886 As a Line Driver Yield Long Reach and Fast Data Rates
      • Abstract
      • LT1886: low distortion line driver
      • LT1886 frequency response
      • A circuit “trick” for a gain of less than 10
    • Chapter 505: A Low Power, High Output Current Dual CFA Makes xDSL Line Driving Clean and Easy
      • Abstract
      • Introduction
      • A low distortion HDSL line driver
      • Performance
      • Conclusion
    • Chapter 506: A Low Cost 4Mbps IrDA Receiver in MS8 and SO-8 Packages
      • Abstract
      • Introduction
      • LT1328 functional description
      • IrDA SIR
      • IrDA FIR
      • 4ppm
      • Conclusion
    • Chapter 507: Telephone Ring-Tone Generation
      • Abstract
      • Requirements
      • An open-architecture ring-tone generator
      • Not your standard bench supply
      • Quad op amp rings phones
  • Index

Quotes and reviews

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