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Power Supplies:  DC to DC / Switch Mode and DC to DC Converters
Boost,    Buck,    Buck-Boost,    Switchmode

Power Supplies -- Main Page           Converters -- Main Page
DC to DC:  #'s - A       B - D       E - L       M - R       S - Z
 

Last Updated: October 24, 2017 02:55 PM

Circuits Designed by Dave Johnson, P.E. :
 Digital noise generator - When you need to test an audio circuit with broadband noise, this circuit works great.  It uses just three inexpensive C-MOS ICs that generate a series of output pulses whose widths vary randomly.  I included a level control pot . . . Hobby Circuit designed by David A. Johnson P.E.-July, 2000

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:

Detect Live AC-Mains Lines -  11/04/10 EDN Design Ideas:  Detect magnetic fields on a wire and light an LED __ Circuit Design by Raju R Baddi, Raman Research Institute, Bangalore, India

Determining inductor power losses -  Coilcraft RF Magnetics App Note- __ Designed by Coilcraft Power Magnetics Application Note

Determining inductor power losses #2 -  Coilcraft RF Magnetics App Note- __ Designed by Coilcraft Power Magnetics Application Note

Digital noise generator -  When you need to test an audio circuit with broadband noise, this circuit works great.  it uses just three inexpensive C-MOS ICs that generate a series of output pulses whose widths vary randomly.  I included a level control pot . . . Hobby Circuit designed by David A. Johnson P.E.-July, 2000

Digitally Controlled HV Solar MPPT DC-DC Converter using C2000 Piccolo MCU -  Photovoltaic (PV) installations tied to the grid are usually built with arrays of modules connected in series to string inverters.  An emerging system architecture to harvest more energy per module by supplementing the conventional string inverter uses dc-dc converters dedicated to individual modules.  These systems, known as microconverters or dc-dc power optimizers address partial shading and other aging issues by implementing maximum power point tracking (MPPT) at the individual module level so that underperforming modules do not constrain the entire string __ Designed by Texas Instruments App Notes, 29-May-12

Diode Ladder Multiplies Voltage Under Software Control -  12/01/11  EDN Design Ideas:  An eight-pin micro multiplies, monitors, and delivers a boosted voltage to a load.   __ Circuit Design by William Grill, Riverhead Systems, Greeley, CO

Diodes improve inverter efficiency  -  04/29/99  EDN-Design ideas   NOTE:  Scroll to find this circuit.   in "Switched-capacitor regulator provides gain" (EDN, March 13, 1998, pg 80) a switched-capacitor voltage inverter wired as a supply splitter steps a positive voltage down to an output voltage equal to half the supply voltage. __ Circuit Design by Jeff Witt, Linear Technology Corp, Milpitas, CA

Discrete component buck converter drives HB LEDs -  03/05/09  EDN Design Ideas:  With just a few components, you can provide sufficient power to operate a high-brightness LED from a battery __ Circuit Design by Dhananjay V Gadre, Netaji Subhas Institute of Technology, New Delhi, India

Doozy requiring some parts you can't get at the 'Shack -  You can make a doozy of a xenon strobe using the 12 volt DC in,  __ Designed by Don Klipstein

Double Data Rate Power Supply using the Tl5002 Voltage Tracking Regulator -  The TL5002EVM-180 synchronous buck converter provides a 12A reference design for evaluating the performance of the TL5002 PWM control IC and the TPS2837 MOSFET driver for Double Data Rate (DDR) memory applications.  __ 

Doubler/Inverter Charge Pumps Divide by Two -  App Note #1876__ Maxim Integrated

Drive 9V Solenoids from 3V Battery -  08/17/95 EDN Design Ideas:  At times, it may be necessary to power a solenoid-type pulsed actuator from a low-voltage battery in portable equipment.  The circuit in Fig 1 accomplishes this task using a standby current of 10 A.  The design takes advantage of the fact that solenoids like being actuated by capacitive discharge at much higher levels than their nominal voltage.  This mode of operation results in a good, crisp response by the solenoid plunger.    __ Circuit Design by Craig Varga, Linear Technology Corp, Milpitas, CA

Drive High-Voltage Varactor Diodes From just 5V -  03/27/97 EDN Design Ideas:   How to connect two international Rectifier (El Segundo, CA]PVi1050s photovoltaic-isolator ICs in series to provide a20-Volt tuning drive for the varactor diode.    __ Circuit Design by Steve Hageman, Hewlett-Packard Co, Santa Rosa, CA

Driving LEDs in Battery Operated Applications: Controlling Brightness Power Efficiently -  App Note #1804__ Maxim Integrated

Dual 12V Power Supply -  Schematic only __ Designed by Tony van Roon  VA3AVR

Dual controller provides 2μs step response & 92% efficiency for 1.5V rails -  12/29/13  EDN-Design Notes   Use a heated diode as a flow sensor.   The LTC3838 is a dual output, dual phase buck controller that employs a controlled constant on-time, valley current mode architecture to provide fast load step response, high switching frequency, and low duty cycle capability.  The switching frequency range is 200kHz to 2MHzits phase-locked loop keeps the frequency constant during steady-state operation and can be synchronized to an external clock.  The LTC3838 accepts a wide input range, 4.5V to 38V, and can produce 0.6V to 5.5V outputs. __ Circuit Design by Mike Shriver

Dual DC/DC Controller for DDR Power with Differential VDDQ Sensing & 50mA VTT Reference -  11/01/13  EDN-Design Notes   Solid-state circuit breaker for microcontrollers.  The LTC3876 is a complete DDR power solution, compatible with DDR1, DDR2, DDR3, and DDR4 lower voltage standards.  The IC includes VDDQ and VTT DC/ DC controllers and a precision linear VTT reference.  A differential output sense amplifier and precision internal reference combine to offer an accurate VDDQ supply.  The VTT controller tracks the precision VTTR linear reference with less than 20mV total error.  The precision VTTR reference maintains 1.2% regulation accuracy, tracking one-half VDDQ over temperature for a 50mA reference load.   __ Circuit Design by Ding Li

Dual DC/DC Converter with Integrated Schottkys Generates 40V Outputs & Consumes Only 40A Quiescent Current -  DN359 Design Notes__ Linear Technology/Analog Devices

Dual High-Current Power Supply Kit -  The National Semiconductor Power Supply Kit is designed around the National LM2636, a synchronous buck regulator.  it provides over 28 amps of current with variable output voltages ranging from +1.3V to +3.3 V.  __ 

Dual Monolithic Buck Regulator Provides Two 1.4A Outputs with 2-Phase Switching to Reduce EMI -  DN305 Design Notes__ Linear Technology/Analog Devices

Dual Output (+12V AT 20mA,-20V AT 10mA) Converter -  From a 2.7V to 5V input, the LT1945 dual boost/inverting regulator generates both positive (12V AT 20mA) and negative (-20V AT 10mA) bias voltages for TFT LCD displays __ Linear Technology/Analog Devices App Note, Mar 24, 2010

Dual Output 32V AT 5mA Converter -  The LT1945 is a dual micropower DC/DC converter in a 10-pin MSOP package.  Each converter is designed with a 350mA current limit and an input voltage range of 1.2V to 15V, making the LT1945 ideal for a wide variety of applications.  Both converters feature a quiescent current of only 20μA at no load, which further reduces to__ Linear Technology/Analog Devices App Note, Jan 30th 2012

Dual Output DC/DC Converter Solutions for Xilinx FPGA Based Systems -  Design Solutions 41 Design Notes__ Linear Technology/Analog Devices

Dual Supercapacitor Backup Power Supply, 0.5V to 5V -  The LTC3122 is a synchronous step-up DC/DC converter with true output disconnect and inrush current limiting.  The 2.5A current limit along with the ability to program output voltages up to 15V makes the LTC3122 well suited for a variety of demanding applications.  Once started, operation will continue with inputs down to 500mV, __ Linear Technology/Analog Devices App Note, Jun 19th 2013

Dual-output nonisolated SMPS powers appliances -  7-Dec-04 EDN Design Ideas:  Modern appliances offer a range of features that rely heavily on microcontrollers and auxiliary circuits.  Although conventional iron-core transformers can provide ac line-isolated, low-voltage power for a microprocessor, coupling the processor's control signals to line-side power switches requires yet another layer of electrical isolation, such as optocouplers or pulse transformers __ Circuit Design by Fabio Cacciotto, STMicroelectronics, Catania, Italy

Dual-phase buck controller drives high Density 1.2V/60A supply with sub-milliohm DCR sensing -  EDN Design Ideas:  07/31/2015    Low output voltages and use of DrMOS integrated FETs+drivers are hallmarks of this switcher design __ Circuit Design by LTC Design Note

Dual-polarity supply provides 12V from one IC -  29-Apr-04 EDN Design Ideas:  Well-regulated, dual-polarity power supplies find wide use in disk-drive, handheld-device, automotive, and notebook-computer applications.  in these applications, board space and allowable component heights are continually shrinking.  So, power-supply designers face the challenge of providing split rails with as few parts as possible, thus saving board space and cost __ Circuit Design by Keith Szolusha, Linear Technology Corp, Milpitas, CA

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