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Power Supplies:  Switch Mode
Switchmode Power Supply:  #'s -F         G - R         S - Z
Boost,   Buck,   Buck/Boost

Power Supplies -- Main Page           Converters -- Main Page

Last Updated: December 31, 2017 06:44 AM

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

Get buck-boost performance from a boost regulator-  07/11/02 EDN Design Ideas:  The SEPIC (single-ended, primary-inductance-converter] topology is generally a good choice for voltage regulators that must produce an on output voltage that falls in the middle of the input-voltage range, such as a 5V output from a 2.7 to 6V input, The topology has some disadvantages, however.  The efficiency of a SEPIC circuit fares worse than that of buck and boost regulators, and SEPIC desig __ Circuit Design by Tom Gross, Linear Technology Corp, Milpitas, CA

Get just enough boost voltage-  27-May-04 EDN Design Ideas:  Adding a current-mirror circuit to a typical boost circuit allows you to select the amount of boost voltage and to ensure a constant difference between the input and the output voltages (Figure 1).  This circuit is useful for high-side-drive applications, in which a simple voltage doubler is unacceptable because of the voltage range of the components involved or where the input voltage can vary __ Circuit Design by Kieran O'Malley, On Semiconductor, East Greenwich, RI

High Input Voltage Monolithic Switcher Steps Up & Down using a Single Inductor Design Note 330A-  DN330 Design Notes__ Linear Technology/Analog Devices

High Performance Switch Mode Power Solutions for Altera Low Voltage FPGAS-  Design Solutions 43 Design Notes__ Linear Technology/Analog Devices

Inductorless Switching Regulator Boosts Input Voltage-  App Note #5__ Maxim Integrated

Industry’s First 4-Switch Buck/Boost Controller Achieves Highest Efficiency using a Single Inductor-  DN369 Design Notes__ Linear Technology/Analog Devices

LDO Buck/Boost 2 Sync Buck Sync Boost Reference Design-  LDO, Buck/Boost, 2 Sync.  Buck, Sync.  Boost with Vin 2.7-4.2 V LiION or 4.5-6.5 V adapter.  Multiple output voltages of 1.5 V, 2.5 V, 3.3  V and 8 V.  The total output power is 5.5 W. __

Li'l PowerHouse Switchmode Power Supply-  This highly efficient design can deliver from 1.23V to 40V at currents up to 1.2A.__ SiliconChip

Li'l PowerHouse Switchmode Power Supply; Pt.2-  Second article has all the construction details.  And we've improved the output filtering for even better performance.__ SiliconChip

Linear Supply for Luxeon 1W Star LEDs-  Simple circuit lets you run one or more Luxeon 1W Star LEDs from a 12V DC supply.  It uses low-cost parts and allows for dimming as well.__ SiliconChip

Linear supply uses switch-mode regulation-  07/19/01  EDN Design Ideas:  You can use simple circuits to implement small, regulated plug-in power supplies.  In Figure 1, a basic and versatile 5V supply uses a zener diode and an emitter-follower transistor.  You must calculate and design the transformer suc __ Circuit Design by David Magliocco, CDPI, Scientrier, France

Low Power DC to DC Converter-  The circuit below is a DC to DC converter using a standard 12 VAC center tapped power transformer wired as a blocking oscillator.  The circuit is not very efficient but will produce a high voltage usable for low power applications.  The input battery voltage is raised by a factor of 10 across the transformer and further raised by a voltage tripler consisting of three capacitors and diodes connected to the high voltage side of the transformer __ Designed by Bill Bowden

LTC Design Note: 42V quad Monolithic synchronous step-down regulator with 30μA quiescent current-  EDN-Design Ideas - 08/30/2016  This circuit impresses with four 2.2MHz bucks in a tiny package - Circuit Design 

LTC Design Note: Dual 9A, step-down μModule regulator with digital power system management-  EDN-Design Ideas - 08/01/2016  This power micro-module includes voltage control and telemetry readback (including temperature, Vin/out & Iin/out) via PMBus - Circuit Design 

LTC Design Note: Versatile industrial power supply takes high voltage input & yields from eight 1A to two 4A outputs-  November 27, 2014-EDN-Design Notes  This ultra-flexible, highly-featured switching regulator IC might be perfect for your next complex and/or industrial design. __ Circuit Design by Martin Merchant

LTC1626: Step-Down Converter Operates from Single Li-ION Cell-  DN196 Design Notes__ Linear Technology/Analog Devices

Method provides self-timing for synchronous rectifiers-  05/16/02 EDN Design Ideas:  Synchronous rectifiers are MOSFETs, driven in such a way as to perform a rectifying function.  They often take the place of diodes in the output-rectification stage of switching power converters, because of their lower on-state power loss.  In power circuits, synchronous rectifiers are often complicated to use because of timing issues __ Circuit Design by Giampaolo Carli, SAE Power Co, Saint-Lazare, Quebec, PQ, Canada

Micropower Buck/Boosts Part 1: Converting Three Cells to 3.3V*-  DN109 Design Notes__ Linear Technology/Analog Devices

Micropower Buck/Boosts Part 2: Converting Four Cells to 5V*-  DN110 Design Notes __ Linear Technology/Analog Devices

Negative-To-Negative Switch-Mode Converter Offers High Current & High Efficiency-  11/12/09  EDN Design Ideas:  Don't let variations in input voltage affect the output voltage __ Circuit Design by Budge Ing, Maxim Integrated Products Inc, Sunnyvale, CA

No Design Switiching Regulator 5V Buck/Boost Positive to Negative Regulator-  DN49 Design Notes__ Linear Technology/Analog Devices

RC network quashes auxiliary winding in quasiresonant converter-  04/01/04  EDN Design Ideas:  Quasi-square-wave-resonant converters, also known as QR (quasiresonant] converters, allow the design of flyback-type SMPSs (switch-mode power supplies] with a reduced EMI (electromagnetic-interference] signature and improved efficiency __ Circuit Design by Nicolas Cyr, On Semiconductor, Toulouse, France

Reduce EMI by sweeping a power supply's frequency-  27-May-04 EDN Design Ideas:  Switching power supplies can be notorious noise generators.  You should prevent this noise, which is conducted, radiated, or both, from returning to the input source, where it can potentially wreak havoc on other devices operating from the same input power.  The goal of an EMI (electromagnetic-interference] filter is to block this noise and provide a low-impedance path back to the noise source __ Circuit Design by John Betten, Texas Instruments, Dallas, TX

Reduce negative-voltage stresses on control IC-  04/18/02  EDN Design Ideas:  In a synchronous, buck switching power supply, the two FETS and the output inductor meet at the phase node (Figure 1).  The phase node often connects directly to the control IC.  The voltage on this node swings from the input voltage __ Circuit Design by Michael Day, Texas Instruments Inc, Dallas, TX

Self switching Power Supply-  One of the main features of the regulated power supply circuit being presented is that though fixed-voltage regulator LM7805 is used in the circuit, its output voltage is variable.  This is achieved by connecting a potentiometer between common terminal of regulator IC and ground.  For every 100-ohm increment in the in-circuit value of the resistance of potentiometer VR1, __

Switchmode Power Supply:  #'s -F         G - R         S - Z

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