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Maxim > Designer's Library > App Notes

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Over 2000 application notes and technical articles written by engineers, for engineers.
You can comment on any application note and contribute to the engineering community.
These articles offer experienced analysis, design ideas, reference designs, and tutorials—to make you an expert.

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Newest Appnotes

Power-Supply Circuits

Application Notes for:

Application Notes by Topology:

ALSO SEE: Power-Supply Cookbook — Tested designs, with bill of materials, to meet your specs.

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App Note 4266 Abstract
An Efficiency Primer for Switch-Mode, DC-DC Converter Power Supplies

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PDF (45K)

App Note 3855 Abstract
Precision Circuit Monitors Negative Supply Current

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PDF (134K)

App Note 3245 Abstract
Injection Transformers for Closed-Loop DC-DC Converter Network Analysis

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PDF (145K)

App Note 3443 Abstract
Line and Load Transient Testing for Power Supplies

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PDF (72K)

App Note 3442 Abstract
Simple PSPICE Model Predicts MAX8546 Stability and Transient Response

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PDF (89K)

App Note 3440 Abstract
An Accurate Control Loop Model for Current-Mode Step-Down Controllers

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PDF (136K)

App Note 3227 Abstract
Power-On Reset and Related Supervisory Functions

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PDF (190K)

App Note 3166 Abstract
Source Resistance: The Efficiency Killer in DC-DC Converter Circuits

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PDF (69K)

App Note 2997 Abstract
Basic Switching-Regulator-Layout Techniques

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PDF (75K)

App Note 245 Abstract
Adding Hysteresis to CPU Supervisor Voltage Sense Inputs Monitoring Upstream Voltage Supplies for Power-Fail Warnings

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App Note 2025 Abstract
Relay Driver Requires Only 25% Power

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App Note 1987 Abstract
Auto-Retry Controller Suits Telecom Applications

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App Note 1932 Abstract
Simple Circuit Generates Multiple Isolated Supply Voltages

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App Note 1930 Abstract
Technology Changes: From a Portable Power Point of View

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App Note 233 Abstract
Regenerating the DS1847/DS1848 Resistor Calibration Constants

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App Note 1897 Abstract
Building a Power Supply That Works

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App Note 1861 Abstract
Pass Transistor Boosts Current from Negative Linear Regulator

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App Note 1853 Abstract
External Pass Transistor Lowers Dropout Voltage

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PDF (48K)

App Note 1843 Abstract
Noise Reduction For ADSL Modem Power

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PDF (79K)

App Note 1817 Abstract
Reduce Component Count and Cut Costs by Disabling the MAX1737 Source-Current Loop

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App Note 225 Abstract
Using Digital Potentiometers in Adjustable Step-Down DC-DC Converter Designs

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App Note 1789 Abstract
A Cheap, Tiny LDO Provides Up To 2A Output Current

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App Note 1781 Abstract
Graphics Chip Supply Delivers 1.65V at 26A

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App Note 1767 Abstract
USB-Powered DSL Modem Supply

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App Note 427 Abstract
48V-to-5V DC-DC Converter Using MAX638 Switching Step-Down Regulator Borrows Power from Phone Lines

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App Note 1213 Abstract
Tracking Power Supply Has Dual Outputs

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PDF (122K)

App Note 716 Abstract
Proper Layout and Component Selection Controls EMI

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App Note 1158 Abstract
Power Supply From 4-20mA Transmission Line

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PDF (58K)

App Note 1133 Abstract
Multiple Voltage Systems Need Supply-Voltage Sequencing

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App Note 1054 Abstract
Simple Change Improves PFM Boost-Controller Efficiency

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App Note 895 Abstract
HFAN-03.1.1: Digitally Programmable Low-Noise Avalanche Photo Detector (APD) Bias Circuit

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App Note 945 Abstract
Step-Up Controller Forms Negative Step-Down Regulator

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PDF (60K)

App Note 908 Abstract
Ultra-Low Resistance Surface Mount Current Shunts

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App Note 718 Abstract
Properties of the Charge-Pump Voltage Splitter

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PDF (149K)

App Note 2031 Abstract
DC-DC Converter Tutorial

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PDF (51K)

App Note 737 Abstract
Choosing the Right Power-Supply IC for your Application

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PDF (37K)

App Note 782 Abstract
Charge Pump Doubles Negative Voltage

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PDF (32K)

App Note 673 Abstract
5-to-1.8V Converter Works Without Magnetics

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PDF (20K)

App Note 1162 Abstract
A 3.3V Input Step-Down Converter for CPU Cores

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PDF (47K)

App Note 476 Abstract
Comparing the I²C Bus to the SMBus

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App Note 482 Abstract
JFET Increases Voltage Rating for Linear Regulator

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PDF (31K)

App Note 478 Abstract
Current-Limit Circuit for the Buck Regulator

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PDF (25K)

App Note 529 Abstract
15V Input Converter Generates -185V at 50mA

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PDF (37K)

App Note 438 Abstract
3.3V Lithium-Ion-Cell Buck/Boost Supply Requires One Inductor

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App Note 295 Abstract
Emitter-Follower Boosts Linear Regulator's Output Current

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App Note 256 Abstract
Two AA Cells Power Step-Down Regulator and 3.3V Boost

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App Note 254 Abstract
Switch-Mode Converter Starts With Full Load Connected

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App Note 1910 Abstract
-12V to -5V/400mA Regulator Ensures Sequencing With 5V Rail

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App Note 90 Abstract
Negative-Output Boost Regulator Has High Efficiency

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App Note 551 Abstract
Negative Buck Regulator Produces Positive Output

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PDF (1138K)

App Note 18 Abstract
Step Down DC-DC Converter Operates as Inverter

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PDF (28K)

App Note 1071 Abstract
DAC-Powered Charge Pump Varies Negative Rail

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PDF (28K)

App Note 411 Abstract
Derive 12V From 8V to 15V Input

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PDF (39K)

App Note 2100 Abstract
Derive 5V From Four AA Cells

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PDF (35K)

App Note 496 Abstract
Autotransformer Boosts Maximum VOUT

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PDF (24K)

App Note 1016 Abstract
Autotransformer Regulator Inverts 12V to -12V

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PDF (34K)

App Note 1923 Abstract
Draw 150mW Of Isolated Power From Off-Hook Phone Line

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PDF (70K)

App Note 59 Abstract
Flyback Winding Adds 12V Output To 5V Buck Regulator

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PDF (22K)

App Note 577 Abstract
High-Frequency Switching IC Powers Portable Telephone

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PDF (31K)

App Note 1808 Abstract
Adjustable LNB Power Supply Is DiSEqC Compatible

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PDF (38K)

App Note 1199 Abstract
Voltage-Inverter IC Forms High-Efficiency Rail Splitter

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PDF (30K)

App Note 1096 Abstract
Transformer-Driver IC Controls Bidirectional Switch

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App Note 1072 Abstract
Boost Controller Drives Buck Converter

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App Note 1029 Abstract
Supply Generates 5V from Low-Voltage Solar-Cell Power

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PDF (32K)

App Note 854 Abstract
Memory-Backup Supply is Simple And Efficient

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