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Voltage Regulator Circuits

Voltage Regulators:  #'s - A       B - D       E - K       L - Q       P - S      
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Last Updated: 09/06/2020 02:31 PM

Capacitance Proximity Switch
Draws very low power - Ideal for battery-powered applications
6 Models Available - Call 806-778-8407

Links to electronic circuits, electronic schematics and designs for engineers, hobbyists, students & inventors:

High-Current Battery Discharger -  if you have a motley collection of 12V batteries in varying states of health, this simple circuit will allow you to easily check their capacity.  it’s basically a high-current discharge load which is controlled by the NIC d Discharger.  This involved increasing the existing 10µF capacitor across LED1 to 100µF, to enable it to supply the__ 

High-current supply uses standard three-terminal regulator -  07/22/04 EDN Design Ideas:  Voltage-regulator design for high output currents can be a critical and difficult task.  Although voltage regulators with 1A maximum output current are simple to design, thanks to 78xx three-terminal voltage regulators, at output currents higher than 1A output, problems arise.  For high output currents, voltage regulators usually use parallel-connected power transistors Design by I Hakki Cavdar, Karadeniz Technical University, Trabzon, Turkey

High-power shunt regulator uses BJT & reference IC -  EDN Design Ideas:  03/17/2014     This circuit provide as much better performance and higher power handling than a Zener diode Design by Chris Toliver

High-Speed Clamp Functions as Pulse-Forming -  10-Jan-08 EDN Design Ideas:  You can use a clamping circuit instead of a Schmitt trigger to clean up high-frequency input pulses Design by Marián Štofka, Slovak University of Technology, Bratislava, Slovakia

High-voltage, low-noise DC/DC converters -  08/07/08  EDN Technical Article: You can make a 1-kV dc/dc converter with only 100 µV of noise.   Design by Jim Williams, EDN's most revered contributor, passed away in June 2011 after a stroke.  He was 63.

Homemade "B" Battery -  I recently purchased a couple of old battery-powered tube radios on eBay with the idea of using their cases to house a transistor radio project.  But these radios were so nice that I couldn't bring myself __  Contact:  Charles Wenzel of Wenzel Associates, Inc.

Hot Swap & Buffer I2C Buses -  DN263 Design Notes__ Linear Technology/Analog Devices

Hot Swap Meets Infiniband Specification -  DN265 Design Notes__ Linear Technology/Analog Devices

Hot Swapping the PCI Bus -  DN155 Design Notes__ Linear Technology/Analog Devices

Hot-Swap Allows Two Computers to Monitor an RS-232 Channel -  05/29/08  EDN Design Ideas:  A hot-swap serial-interface circuit allows two computers to monitor all the traffic on an RS-232 port Design by Jeff Patterson, All Weather Inc, Sacramento, CA

Hot-Swap Controller Handles Dual Polarity -  12/11/03 EDN Design Ideas:  Some applications require a hot-swap controller, a circuit-breaker function, or both for dual-polarity, dc-input power-supply rails.  in some hot-swap cases, the requirement is based only on inrush-current considerations.  Control of Design by Dan Meeks, Texas Instruments, Manchester, NH

Hot-swap structure offers improved redundancy -  01/09/03 EDN Design Ideas:  For redundancy purposes, a number of power supplies, using ORing diodes, can work into the same load.  During maintenance, when you can remove any power supply, the minimum possible power perturbation at the load is desirable.  To compensate for the voltage drop across the ORing diodes, you must connect the power-supply feedback lines after the diodes, at the load Design by Samuel Kerem, Corvus Corp, Columbia, MD

How to Design a Simple Circuit Isolated Flyback Converter-LT3573 -  isolated power supplies are needed in a wide variety of applications.  Galvanic isolation is achieved by isolating two or more circuits using a transformer or optocoupler, and is desirable for many reasons: safety, noise immunity, circuit protection, etc.  Traditionally, isolated power supplies use an optocoupler to transfer__ Linear Technology/Analog Devices App Note, Mike Negrete-Design Engineer-Power Products Mar 15th 2009

HV flyback converter improves efficiency -  11/05/13  EDN Design Ideas:  This Design idea significantly improves conversion efficiency of externally driven flyback converter-based capacitor charging units intended for flash-lamp-pumped, pulsed solid-state laser sources.  in a flash-pumped pulsed solid state laser source, an energy storage capacitor is charged to a high voltage, dependent upon the amount of energy it is intended to deliver to the flash lamp when made to discharge.   Design by anil maini , Varsha Agrawal & Nakul Maini

Hysteretic regulators provide high performance at low-cost -  2-Sep-04 EDN Design Ideas:  Hysteretic voltage regulators offer the potential advantages of simplicity, fast response, 100%-duty-cycle operation, high efficiency at light loading, and low cost.  They need no loop-compensation components to add delays; thus, response time to a load change is less than one switching cycle.  What's the catch? You must be able to accept a switching frequency that is not precisely controlled and Design by Wayne Rewinkel, National Semiconductor, Phoenix, AZ

Improve On BIAS for GAAS FETs -  12/06/01  EDN Design Ideas:  it's important to properly sequence the bias applied to an RF/microwave GaAs FET or a MMIC  (monolithic-microwave-IC ] amplifier.  These devices are extremely sensitive to drain and gate voltage levels as well as to the order in which t Design by Tom Roberts, Anritsu Co, Morgan Hill, CA

Improve transient Dynamics -  06/24/99 EDN Design Ideas:  Designing low-voltage, high-current converters with fast dynamic performance places stringent demands on a system designer.  However, a simple technique reduces the peak voltage deviation and decreases the response time for a tran Design by Robert Sheehan, Linear Technology Corp, Milpitas, CA

Increasing Regulator Current -  An outboard pass transistor used to increase the current output of a voltage regulator IC .   __ Designed by Andy Collison

Inductor Selection for Lt 1070 Switching Regulators -  DN8 Design Notes__ Linear Technology/Analog Devices

Inductorless converter provides high efficiency -  02/17/00 EDN Design Ideas:  Two common methods exist for generating a regulated dc output voltage that is lower than the input voltage.  The first approach is to use a low-dropout (LDO) regulator.  LDO regulators are small, easy to use, and inexpensive, but a Design by Sam Nork

Industrial 12V 1MHz Regulator with Custom Input Undervoltage Lockout Thresholds -  The LTC3115-1 is a high voltage monolithic synchronous buck-boost DC/DC converter.  its wide 2.7V to 40V input and output voltage ranges make it well suited to a wide variety of automotive and industrial applications.  A proprietary low noise switching algorithm optimizes efficiency with input voltages that are above, below or__ Linear Technology/Analog Devices App Note, Mar 29th 2012

Innovation Pushes State-of-the-Art in Voltage References -  Most system designers use voltage references in their circuits.  While many will agree that the performance may ultimately be limited by the reference, they are often unclear as to why.  With so many reference products available, designers often choose based on a tradeoff between price and precision, using only initial accuracy __ Linear Technology/Analog Devices App Note, Brendan Whelan Nov 8th 2010

Input Attenuator for the Digital Audio Millivoltmeter -  if you'd like to be able to use our Digital Audio Millivoltmeter to measure AC voltages up to 140V RMS, this add-on project is the answer.  it's a simple switched input divider which lets you add 40dB, 20dB or 0dB of attenuation ahead of the meter at the touch of a knob.__ SiliconChip

Instrumentation Circuitry Using RMS-to-DC Converters -  Linear Technology AN106 __ Designed by Jim Williams - Feb 21st, 2007

Interfacing 5 Volt CMOS to 12 Volt loads -  The circuit above is designed to be used with the bi-directional lamp sequencer shown above on this same page.  Two additional transistors are used to increase the current from the 74HCT138 decoder to control 12 volt 25 watt lamps.  A 6.8 volt/1 watt zener diode is used in series with the ground connection of all the CMOS ICs  (74HC14, CD4516 and 74HC138s) so that the total voltage across the CMOS devices will be about 5.2 volts and the outputs will move from +12 to about +7 when selected.  The 2N2905/PNP transistor stage is connected as an emitter follower which provides a high impedance to the __ Designed by Bill Bowden

Interference Free Switch Mode Pre-Regulator -  I created this circuit to fix an overheating problem with a small Chinese-made stereo set.  This simple solution to a perplexing problem worked so well that I felt the need to share it.  This circuit can be used for other applications as well.   __ Designed by Andrew R. Morris

Introducing the LT3070 Point-of-Load Regulator for FPGA & Server Backplanes -  Modern FPGAs and servers operating at low voltages are sensitive to subtle supply drops.  The droop may result from a combination of excess regulator noise, insufficient bandwidth in the supply regulator, excess ESR & ESL in the decoupling components, or distributed inductance in the power distribution.  To abate the risk__ Linear Technology/Analog Devices App Note, Kelly Consoer Jan 4th 2011

Inverted Regulator Increases Choice & Reduces Complexity -  112/05/09 EDN Design Ideas:  A simple approach for any high side overcurrent-protection circuit references the entire circuit to the high-side rail Design by David McCracken, Aptos, CA

Isolated Converters Have Buck Simplicity & Performance -  DN377 Design Notes__ Linear Technology/Analog Devices

Isolated DC/DC Conversion with the LT1425 -  DN158 Design Notes__ Linear Technology/Analog Devices

Isolated Flyback Converter Regulates Without an Optocoupler -  DN260 Design Notes__ Linear Technology/Analog Devices

Isolated Signal Trims DC/DC Converter -  09/01/95 EDN Design Ideas:  Adding a single resistor and optoisolator to the standard dc/dc converter trim in Fig 1a results in an isolated trim configuration (Fig 1b).  in Fig 1a, VOUT equals VTRiMxVNOM/2.5V.  in this example, VNOM is 15V, and VTRiM is 0 to 2.5V.  This configuration is acceptable for most applications, except those in which the trim signal must be totally isolated from the converter.  For Fig 1b, many types of analog optoisolators are available, but the VTL2C2 provide as the necessary characteristics.   Design by Dennis Eichenberg, Parma Heights, OH

Isolated Supply Powers DVM Module -  02/07/08  EDN Design Ideas:  A simple, low-cost, isolated flyback power supply energizes a DVM module Design by Richard Dunipace, Fairchild Semiconductor, Irving, TX

Isolated T1 current loop to voltage power supplies -  Designed to operate on a standard 60 mA current loop circuit (T1 current loop) this power supply provides an isolated and regulated 5 VDC at 140 mA. __ Designed by Steve Hageman

Isolated telecomm converter handles 25W -  09/01/97 EDN Design Ideas:  Telecomm applications in the central office require an isolated5V supply derived from ­48V, this gives out5V at5A from an input voltage of ­36 to ­72V Design by Ron Young, Maxim Integrated Products, Sunnyvale, CA

Isolated-20 Watt, OEM DC/DC converter (with Telecom input voltage range) -  12 Watt, Single output, isolated, Modular power supply designed for flexible OEM manufacturing.  The supply may be built for +2.5 to +15 volt outputs with inputs of 9-18, 18-36 or 36-72 VDC. __ Designed by Steve Hageman

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Got Designs?
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if you want me to link to and/or post your original design Thanks.

Voltage Regulators:  #'s - A       B - D       E - K       L - Q       P - S       T - Z

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