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Voltage Regulator Circuits

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

 

Last Updated: 11/30/2017 07:17 AM



Circuits Designed by Dave Johnson, P.E. :

Laptop Power Supply -  Concept Only.  I have a big screen HP laptop computer.  The large brick size AC to DC power supply is rated at 19.2v and 9.5 amps, which is about 180 watts.  I'd like to be able to use the thing in my car.  I looked into a 12v car adapter for it but never really found one that I liked. . . . Hobby Circuit designed by Dave Johnson P.E.-July, 2009

Light to Frequency Converter -  This circuit uses a CMOS version of the classic 555 timer, to form a light intensity to frequency converter.  A small Pin photo diode is used as the light detector.  The pulses produced are short, so in some applications you may want to stretch them or . . . Hobby Circuit designed by David A. Johnson P.E.-May, 2008

LM317 adjustable voltage regulator used in Battery Eliminator Circuit -  if you use a 1.5v or a 3v battery powered MP3 player for long periods of time, you may get tired of constantly changing batteries.  Some older players do not work will NiMH
rechargeable batteries so changing out batteries can get expensive.  The circuit be . . . Hobby Circuit designed by David A. Johnson P.E.-June, 2005

Miniature Pushbutton On/Off Switch -  in many battery powered devices, you would like to turn the circuit on and off by pressing a small pushbutton switch.  One press turns the device on and second press turns it back off.  The flip/flop circuit below uses a minimum number of parts to perform . . . Hobby Circuit designed by Dave Johnson P.E.-October, 2005

Negative 0.5 Volt Supply -  This simple circuit consists of two LEDs and a photo diode.  it generates a negative voltage with a current level of a couple milliamps.  it is ideal for supplying a negative rail to low power “rail to rail” op amp circuits, which need to have a true zero volts output.  Note:  This circuit is not particularly efficient . . . Hobby Circuit designed by David Johnson P.E.-July, 2006

Nine-Volt Battery Eliminator -  if you use 9v battery powered devices for long periods of time, you may get tired of constantly changing batteries.  The circuit below can be wired into any 9v battery powered device, drawing power from an external AC to DC power adapter.  I designed the circuit. . . Circuit by David A. Johnson P.E.-December, 2009

Capacitance Proximity Switch
Draws very low power - Ideal for battery-powered applications
6 Models Available - Call 806-368-7747




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

LTC Design Note 509: Micropower Isolated Flyback Converter with Input Voltage Range from 6V to 100V -  EDN Design Ideas:  03/30/2014     A tiny, integrated flyback converter requires minimal support components __ Circuit Design

LTC Design Note: Dual 13A μModule regulator with digital interface for remote Monitoring & control of power -  EDN Design Ideas:  04/06/2015    Digital power system management (PSM) enables on-demand telemetry capability to set, monitor, change, and log power parameters of dual high-current __ Circuit Design

LTC Design Note: Robust 10MHz reference clock input protection & distributor for RF systems -  07/31/14  LTC Design Notes: Design a protected 10MHz reference input without degrading phase noise. __ Circuit Design by Michel Azarian

LTC Design Note: Ultrathin dual 2.5A or single 5A μModule regulator fits on the backside of PCBs, allowing space on the topside for digital ICs -  EDN Design Ideas:  09/29/2016    This versatile DC-DC excels where height is limited and multiple ganging options are advantageous __ Circuit Design

LTC1267 Dual Switching Regulator Controller Operates from High Input Voltages -  DN114 Design Notes__ Linear Technology/Analog Devices

LTC1436-PLL Low Noise Switching Regulator Helps Control EMI -  DN141 Design Notes__ Linear Technology/Analog Devices

LTC1474/LTC1475 High Efficiency Switching Regulators DraW Only 10µA Supply Current -  DN162 Design Notes__ Linear Technology/Analog Devices

LTC1645 Dual Channel Hot Swap Controller/Power Sequencer -  DN217 Design Notes__ Linear Technology/Analog Devices

LTC1646: Power Supply Isolation Controller Simplifies Hot Swapping the CompactPCI Bus for 5V-/3.3V-Only Applications -  DN253 Design Notes__ Linear Technology/Analog Devices

LTC1702/LTC1703 Switching Regulator Controllers Set a New Standard for Transient Response -  DN206 Design Notes__ Linear Technology/Analog Devices

LTC3129 15V, 200mA Synchronous Buck-Boost Converter with 1.3uA Iq-Video Product Brief -  The LTC®3129-1 is a high efficiency, 200mA buck-boost DC/DC converter with a wide ViN and VOUT range.  it includes an accurate RUN pin threshold to allow predictable regulator turn-on and a maximum power point control (MPPC) capability that ensures maximum power extraction from non-ideal power sources such as photovoltaic__ Linear Technology/Analog Devices App Note, Bruce Haug-Senior Product Marketing Engineer Sep 23, 2013

LTC3375 8-Ch Programmable, Parallelable 1A Buck PMIC-Video Product Brief -  The LTC®3375 is a digitally programmable high efficiency multioutput power supply IC .  The DC/DCs consist of eight synchronous buck converters (iOUT up to 1A each) all powered from independent 2.25V to 5.5V input supplies.  DC/DC enables, output voltages, operating modes, and phasing may all be independently programmed over__ Linear Technology/Analog Devices App Note, Steve Knoth-Senior Product Marketing Engineer Mar 25th 2013

LTC3676 8-Output PMIC for Application Processors-Video Product Brief -  The LTC®3676 is a complete power management solution for advanced portable application processor-based systems.  The device contains four synchronous step-down DC/DC converters for core, memory, I/O, and system on-chip (SoC) rails and three 300mA LDO regulators for low noise analog supplies.  The LTC3676-1 has a ±1.5A __ Linear Technology/Analog Devices App Note, Steve Knoth-Senior Product Marketing Engineer, Power Products Oct 24th 2013

LTC3863 60V Low IQ Inverting DC/DC Controller-Video Product Brief -  The LTC®3863 is a robust, inverting DC/DC PMOS controller optimized for automotive and industrial applications.  it drives a P-channel power MOSFET to generate a negative output and requires just a single inductor to complete the circuit.  Output voltages from –0.4V to –150V are typically achievable with higher__ Linear Technology/Analog Devices App Note, Bruce Haug-Senior Product Marketing Engineer Jun 11th 2013

LTC3866 Current Mode Synchronous Controller for Sub Milliohm DCR Sensing-Video Product Brief -  The LTC®3866 is a single phase current mode synchronous step-down switching regulator controller that drives all N-channel power MOSFET switches.  it employs a unique architecture which enhances the signal-to-noise ratio of the current sense signal, allowing the use of a very low DC resistance power inductor to maximize the__ Linear Technology/Analog Devices App Note, Bruce Haug-Product Marketing Engineer May 2, 2012

LTC4222 μTCA Application Supplying 12V Payload Power to Two μTCA Slots -  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

LTC4225 μTCA Application Supplying 12V Power to Two μTCA Slots -  The LTC4225 offers ideal diode and Hot Swap functions for two power rails by controlling external series connected N-channel MOSFETs.  MOSFETs acting as ideal diodes replace two high power Schottky diodes and the associated heat sinks, saving power and board area.  Hot Swap control MOSFETs allow boards to be safely inserted __ Linear Technology/Analog Devices App Note, Apr 22, 2011

LTC4360/LTC4361/LTC4362 Overvoltage / Overcurrent Protection Controllers-Video Product Brief -  The LTC4360/LTC4361/LTC4362 overvoltage/overcurrent protection controllers safeguard 2.5V to 5.5V systems from input supply overvoltages and overcurrents.  They are designed for portable devices with multiple power supply options including wall adapters, car battery adapters and USB ports.  The LTC4360 controls an external __ Linear Technology/Analog Devices App Note, Alison Steer-Product Marketing Manager Aug 25th 2010

LTC6655 0.25ppm Noise, Low Drift Precision Buffered Reference Family-Video Product Brief -  The LTC6655 is a complete family of precision bandgap voltage references, offering exceptional noise and drift performance.  This low noise and drift is ideally suited for the high resolution measurements required by instrumentation and test equipment.  in addition, the LTC6655 is fully specified over the temperature range of __ Linear Technology/Analog Devices App Note, Lailanie Reyes-Signal Conditioning Marketing Team Jan 5th 2010

LTM4620 100A & 26A Thermal Performance -  Measuring the thermal performance of the LTM4620 in 100A (4 parallel LTM4620's) and 26A (single LTM4620) configurations, with and without airflow.  __ Linear Technology/Analog Devices App Note, Aug 15th 2012

LTM4620 Current Sharing  -  Current sharing test of the LTM4620.  During both startup and shutdown, current sharing between LTM4620's is smooth and well controlled.  __ Linear Technology/Analog Devices App Note, Aug 15th 2012

LTM4620 Dual 13A Regulator -  This circuit shows a simplified block diagram of the LTM4620 μModule regulator in a dual output design.  its two internal high performance synchronous buck regulators produce 1.2V and 1.5V rails, each with 13A load current capability.  The input voltage range is 4.5V to 16V.  __ Linear Technology/Analog Devices App Note, Oct 3, 2012

LTM4620 Efficiency -  Measuring the efficiency of the LTM4620 with Vin = 12, Vout = 1.2V.  At 100A load current, efficiency is above 83%.  __ Linear Technology/Analog Devices App Note, Aug 15th 2012

LTM4620 Short Protection -  Demonstration of short circuit protection of the LTM4620.  With the output shorted to ground, both current and temperature are controlled.  The circuit recovers when the short circuit is removed.  __ Linear Technology/Analog Devices App Note, Aug 15th 2012

Making Voltage Doublers & Multipliers -  Find out how to construct an AC voltage doubler circuit.  Extend it to a tripler circuit and more.   __ Designed by REUK-Renewable Energy UK website

Measure Small Current in DC Servo Motor -  12/06/01 EDN Design Ideas:  The simple Circuit design in Figure 1 lets you measure all components of a current flowing in a dc servo motor.  The rectified output of the circuit uses ground as a reference, so you can measure the output by using a single-ended A/D converter.  The current-sense resistor, R1, has a value of 0.1Ω  __ Circuit Design by Shyam Tiwari

Method provides fast, glitch-free isolation of I2C & SMBus signals -  24-Jun-04 EDN Design Ideas:  i2C is a popular serial protocol for power controllers, ADCs and DACs, EEPROMs, and other devices.  in certain data-acquisition and power-control situations, you must isolate the i2C master from one or slave devices for noise, grounding, or safety issues.  Also, although 128 peripherals may connect to the bus, at some point, differences in ground potential and excessive bus capacitance __ Circuit Design by Mark Thoren, Linear Technology Corp, Milpitas, CA

Method provides overpower protection for quasiresonant supplies -  28-Oct-04 EDN Design Ideas:  The main characteristic of quasiresonant switch-mode power supplies is that they exhibit a varying frequency when the input voltage changes.  For a flyback power supply, the power delivered to the output obeys the following equation  POUT=1/2 (LP×iP 2×FSWη], where LP is the primary inductance, IP is the peak primary current, FSW is the switching frequency, and η is the e __ Circuit Design by Nicolas Cyr, On Semiconductor, Toulouse, France

MIC2527 Voltage Drop, Packaging & PCB Layout -  App Note 30 -- MIC 2527 Voltage Drop, Packaging, and PCB Layout __ Designed by Micrel

Microcontroller Delivers Voltage-multiplied DC Power -  05/11/06 EDN Design Ideas:  Use the microcontroller's comparator and PWM blocks to form a simple inductor-based boost converter __ Circuit Design by Aaron Lager, Masterwork Electronics, Santa Rosa, CA

Microcontroller, JFET form low-cost, two-digit millivoltmeter -  06/22/06 EDN Design Ideas:  Software subroutines replace hardware A/D converter __ Circuit Design by Noureddine Benabadji, University of Sciences and Technology, Oran, Algeria

Micropower Isolated Flyback Converter with Input Voltage Range from 6V to 100V -  EDN Design Ideas:  03/30/2014     A tiny, integrated flyback converter requires minimal support components __ Circuit Design by LTC Design Note 509

Micropower Regulator with Comparator & Shutdown -  Switching Regulator__ Linear Technology/Analog Devices

Micropower, 10ppm/°C, ±5V Reference -  The left OpAmp precisely amplifies the 1.2V shunt reference to +5V and the right section inverts that to make -5V.  __ Linear Technology/Analog Devices App Note, Jun 21, 2011

Miniature Pushbutton On/Off Switch -  in many battery powered devices, you would like to turn the circuit on and off by pressing a small pushbutton switch.  One press turns the device on and second press turns it back off.  The flip/flop circuit below uses a minimum number of parts to perform . . . Hobby Circuit designed by Dave Johnson P.E.-October, 2005

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


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