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Regulator Circuits
Regulators:  #'s - A       B - G       H - Q       R - S       T  - Z


Last Updated: October 24, 2017 02:55 PM
Circuits Designed by Dave Johnson, P.E. :

AC to DC (240v to 5v)Power Supply - This is simple way to power some 5v logic from a 240vac source.  If a 120vac power adapter is used, the circuit will also work for 120vac power lines . . . Hobby Circuit designed by David A. Johnson P.E.-February, 2002


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

A Gentle Guide for the Trepidatious -  Linear Technology AN25 __ Designed by Jim Williams - Sep 2nd, 1987

A Low Battery Cutoff -  Also acts as a Master On / Off Switch.  NOW, Also a New P-Mos Version.  Supplies Positive voltage to grounded devices.   __ Designed by G.L. Chemelec

A Monolithic Switching Regulator with 100µV Output Noise -  Linear Technology AN70 __ Designed by Jim Williams - Oct 1st, 1997

A New High Efficiency Monolithic Synchronous Step-Down Regulator works with Single or Dual Li-ION Batteries -  DN201 Design Notes__ Linear Technology/Analog Devices

A Simple Circuit High Efficiency Step-Down Switching Regulator -  DN73 Design Notes__ Linear Technology/Analog Devices

A Simple Circuit Ultra-Low Dropout Regulator -  DN32 Design Notes__ Linear Technology/Analog Devices

AC to DC (240v to 5v)Power Supply -  This is simple way to power some 5v logic from a 240vac source.  if a 120vac power adapter is used, the circuit will also work for 120vac power lines . . . Hobby Circuit designed by David A. Johnson P.E.-February, 2002

Achieving Microamp Quiescent Current in Switching Regulators -  DN11 Design Notes __ Linear Technology/Analog Devices

Add a grounded-switch feature for Top Switch on/off control -  06/21/07  EDN Design Ideas:  Adding a couple of components to the control pin of a Topswitch switching regulator enables on/off control __ Circuit Design by Robert N Buono, Aeolian Audio LLC, Bloomfield, NJ

Add a signal-strength display to an FM receiver IC -  09/05/02  EDN Design Ideas:  The Philips (www.  semiconductors.  philips.  co) TDA7000 integrates a monaural FM-radio receiver from the antenna connection to the audio output.  External components include one tunable LC circuit for the local oscillator, a few capacito __ Circuit Design by José Miguel-López, RF Center Ltd, Barcelona, Spain

Add an auxiliary voltage to a buck regulator -  31-Oct-02 EDN Design Ideas:  You often need more than one regulated output voltage in a system.  A frequently used and reasonably simple way to create this auxiliary output voltage is to add a second winding to the output inductor, creating a coupled inductor or a transformer, followed by a diode to rectify (peak-detect] this output voltage __ Circuit Design by John Betten, Texas Instruments, Dallas, TX

Add sequencing & shutdown control to regulator -  10/30/03  EDN Design Ideas:  Modern microprocessor- or FP-GA-based circuits require separate and independent power-supply voltages for the core and the i/O circuits.  Some devices require stringent control of the turn-on characteristics and sequencing of these  __ Circuit Design by Said Jackson, Equator Technologies Inc, Campbell, CA

Added components improve switching-regulator stability -  09/29/05 EDN Design Ideas:  Extra components reduce effects of external load capacitance and ESR __ Circuit Design by Wayne Rewinkel, National Semiconductor, Schaumburg, IL

AdvancedTCA Four Fuse Monitoring Application -  The LTC4261 negative voltage Hot Swap controllers allow a board to be safely inserted and removed from a live backplane.  Using an external N-channel pass transistor, the board supply voltage can be ramped at an adjustable rate.  The devices feature independently adjustable inrush current and overcurrent limits to minimize stresses __ Linear Technology/Analog Devices App Note, Mar 26th 2010

AdvancedTCA with High-Side & Low-Side Ideal Diode-OR & Hot Swap Controller with I2C Current & Voltage Monitor -  The LTC4355 is a positive voltage ideal diode-OR controller that drives two external N-channel MOSFETs.  Forming the diode-OR with N-channel MOSFETs instead of Schottky diodes reduces power consumption, heat dissipation and PC board area.  __ Linear Technology/Analog Devices App Note, Mar 26th 2010

AMC 2V & 3.3V Hot Swap Controller Application with Digital Monitoring -  The LTC4222 Hot Swap controller allows two power paths to be safely inserted and removed from a live backplane.  Using external N-channel pass transistors, board supply voltages and inrush currents are ramped up at an adjustable rate.  An i2C interface and onboard ADC allows for monitoring of current, voltage and fault status __ Linear Technology/Analog Devices App Note, Mar 26th 2010

Amperage Booster for 78xx's -  Volt regulators such as the LM708, and LM317 series (and others) sometimes need to provide a little bit more current then they actually can handle.  if that is the case, this little circuit can help out.  A power transistor such as the 2N3772 or similar can be used (See the project on the 3-part variable power supply)  __ Designed by Tony van Roon  VA3AVR

Amperor 12 Volt LCD TFT Stabiliser -  A 12V regulator for use with flat screen televisions and more.   __ Designed by REUK-Renewable Energy UK website

AN126 - 2-Wire Virtual Remote Sensing for Voltage Regulators - Clairvoyance Marries Remote Sensing -  Linear Technology AN126 __ Designed by Jim Williams - Oct 1st, 2010

AN2 - Performance Enhancement Techniques for Three-Terminal Regulators -  Linear Technology AN2 __ Designed by Jim Williams - Aug 2nd, 1984

AN25 - Switching Regulators for Poets: A Gentle Guide for the Trepidatious -  Linear Technology AN25 __ Designed by Jim Williams - Sep 2nd, 1987

AN70 - A Monolithic Switching Regulator with 100µV Output Noise -  Linear Technology AN70 __ Designed by Jim Williams - Oct 1st, 1997

AN83 - Performance Verification of Low Noise, Low Dropout Regulators -  Linear Technology AN83 __ Designed by Jim Williams - Mar 1st, 2000

AN85 - Low Noise Varactor Biasing with Switching Regulators: Vanquishing Villainous Vitiators Vis-ŕ-Vis Vital Varactors -  Linear Technology AN85 __ Designed by Jim Williams - Aug 1st, 2000

Another solar panel regulator -  This is a switching shunt regulator which is very simple and reliable, but does not regulate as smoothly as the one above and has no deep-discharge protection.  it was built for a yacht. __ Designed by Manfred Mornhinweg

Auto-Adjustable Regulators Power Pentium Pr -  12/07/95  EDN Design Ideas:  Powering intel’s next-generation Pentium Pro (P6) µ proves to be a nontrivial task due to both the greater-than-30W load and the need to finely adjust input voltage level on a chip-by-chip basis.  The AA32A family of switching regulators from Astec America __ Circuit Design by Maury Wright Astec America Inc, Carlsbad, CA

Automotive 5V Regulator with Cold Crank Capability -  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 even equal to the output voltage and ensures seamless transitions between operational modes.  __ Linear Technology/Analog Devices App Note, Dec 5, 2011

Automotive 9V-19.5Vin to 5V at 1A with 60V Transient Protection & 1.7MHz Switching Frequency -  The LT3682 is a 1A monolithic buck switching regulator that accepts input voltages from 3.6V to 36V and transients up to 60V.  it features an adjustable and synchronizable switching frequency from 250kHz to 2.2MHz.  it also has the ability to monitor the current flowing through the external catch diode, thus providing an extra level of protection against output fault conditions over the entire operating frequency range, regardless of input voltage__ Linear Technology/Analog Devices App Note, Jul 22, 2010

Automotive Switching Regulators Get Input-Transient-Voltage Protection -  01/24/08  EDN Design Ideas:  A simple scheme protects switching regulators against 50V voltage transients in automotive applications __ Circuit Design by Kevin Daugherty, National Semiconductor, Novi, MI

Autotransformer regulator inverts 12V to produce ­12V -  08/01/1997 EDN Design Ideas:  You can create a dc/dc regulator with an internal switching MOSFET that inverts 12V to produce an output of 200 mA at ­12V.  The IC is a high-efficiency device whose low quiescent current (120 µA maximum) is the product of a CMOS process that limits the absolute-maximum input-to-output voltage to 21V.    __ Circuit Design by Dana Davis

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Regulators:  #'s - A       B - G       H - Q       R - S       T  - Z

 


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