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Boost / Step Up Power Supplies
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Boost,    Buck,    Buck-Boost,    Switchmode
Power Supplies -- Main Page           Converters -- Main Page

Last Updated: December 31, 2017 06:44 AM

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:

1 Transistor Provides Short-Circuit Protection-  10/16/03  EDN Design Ideas:  In certain DC/DC-converter applications, on-chip, cycle-by-cycle current limit may be insufficient protection to prevent a failure during a short circuit.  A nonsynchronous boost converter provide as a direct path from the input to th __ Circuit Design by Keith Szolusha, Linear Technology Corp, Milpitas, CA

12V to 28V DC-DC Converter with LM2585-  This boost regulator is for those times when you have a 28v relay, but want to use it with a 12v source.  The circuit is built around the National Semiconductor LM2585, and uses the energy stored in an inductor to boost the 12v to 28.  Output voltage can be varied by adjusting the ratio of resistor values on the feedback pin. __

2 AA Cells replace 9V Battery Extend Operating Life-  DN63 Design Notes__ Linear Technology/Analog Devices

2.5V to 36V Input, 12V/1A Output SEPIC Converter (Automotive 12V Regulator)-  The LT3759 is a wide input range, current mode, DC/DC controller which is capable of regulating either positive or negative output voltages from a single feedback pin.  It can be configured as a boost, SEPIC or inverting converter.  The LT3759 drives a low side external N-channel power MOSFET.  An internal LDO regulator draws__ Linear Technology/Analog Devices App Note, Sep 22, 2011

2-Phase Boost Converter Delivers 10W from a 3mm x 3mm DNF Package-  DN354 Design Notes__ Linear Technology/Analog Devices

2-Transistor Amplifier-  It has been interesting analyzing these radios.  You have to give the Japanese credit for even making a radio that can drive a speaker with only 2 transistors! Basically, the first transistor (Q1) performs double-duty.  It first acts as an RF amplifier, with some of the signal being fed back to the antenna coil to provide some regeneration for better selectivity and sensitivity __ Designed by schematic and circuit description were provided Ronald Rissel

3 Input Supply Powers 3.3 Volt Portables-  The single-ended primary-inductance converter (SEPIC) of Figure 1 accepts input voltages ranging from 3V to over 6V, and produces a regulated 3.3 V, 200mA output.  It accepts an input voltage from three sources: a 5V dc wall cube, a 3-cell AA battery, and a lithium backup battery.  App Note 136 __ Designed by Len Sherman, Maxim Integrated Products, Sunnyvale, CA

3 parts provide tenfold increase in switcher current-  08/22/02 EDN Design Ideas:  Industrial-control circuits often derive their power from widely varying sources that can exceed the 40V maximum rating of popular switching ICs.  This design idea presents a simple, flexible, and inexpensive buck switcher that converts an input voltage as high as 60V to 5V at several amps.  The circuit is unique in that it boosts current with almost no compromise in performance, size, or cost __ Circuit Design by Wayne Rewinkel, National Semiconductor, Sunnyvale, CA

3.3V converter Delivers 3W from Li-Ion battery-  11/05/98 EDN-Design Ideas (Several circuits here, scroll to find this one) Lithium-ion batteries are rapidly gaining popularity in portable applications because of their superior energy density, low self-discharge rate, and high cell voltage.  When you use one Li-ion battery to power a 3.3V DC/DC converter; however, you encounter a problem, because the battery voltage. __ Circuit Design by David Salerno, Unitrode Corp, Merrimack, NH

3.3V to 50V Low Noise APD Bias Supply with Ultrafast Current Monitor Transient Speed-  The LT3571 is a current mode step-up DC/DC converter designed to bias avalanche photodiodes (APDs) in optical receivers with an output voltage up to 75V.  The LT3571 features a high side fixed voltage drop APD current monitor with better than 10% relative accuracy over the entire temperature range.  The integrated power switch, __ Linear Technology/Analog Devices App Note, Mar 29th 2010

3.3V to 70V Low Noise APD Bias Power Supply with Fast Current Monitor Response-  The LT3482 is a fixed frequency current mode step-up DC/DC converter with voltage doubler designed to bias avalanche photodiodes (APDs) in optical receivers.  It can provide up to 90V output.  The LT3482 features high side APD current monitoring with better than 10% relative accuracy over the entire temperature range.  The integrated__ Linear Technology/Analog Devices App Note, Mar 29th 2010

3-Band Equalizer-  Using a single op-amp this easy to make equalizer offers three ranges, low frequency, mid frequency, and high.  With component values shown there is approximately +/-20dB of boost or cut at frequencies of 50Hz, 1kHz and 10kHz.  Supply voltage may be anything from 6 to 30 Volts.  Maximum boost 20dB is only realized with maximum supply voltage __ Designed by Andy Collison

3-Input Supply Powers 3.3V Portable-  04/13/95 EDN Design Ideas:  The single-ended primary-inductance converter in Fig 1 accepts input voltages ranging from 3 to more than 6V and produces a regulated 3.3 V, 200-mA output.  The converter accepts an input voltage from three sourcesa 5V dc wall cu __ Circuit Design by Len Sherman, Maxim Integrated Products, Sunnyvale, CA

3MHz Micropower Synchronous Boost Converters Deliver 3W from Two Cells in a Tiny MSOP Package-  DN246 Design Notes __ Linear Technology/Analog Devices

450V Boost Converter-  Charge capacitor banks to hundreds of volts from a 12V battery.__

4-Phase Monolithic Synchronous Boost Converter Delivers 2.5A with Output Disconnect in a 5mm x 5mm QFN Package-  DN332 Design Notes __ Linear Technology/Analog Devices

500kHz 6a Monolithic Boost Converter LT1370-  DN183 Design Notes__ Linear Technology/Analog Devices

55V High efficiency buck-boost power manager & multi-chemistry battery charger-  EDN Design Ideas:  01/01/2016  A versatile, efficient, multi-chemistry battery charger design operates in buck & boost modes. __ Circuit Design by LTC Design Note

5V at 6mA for 9.6s Supercapacitor Backup Supply-  The LT1316 is a micropower step-up DC/DC converter that operates from an input voltage as low as 1.5V.  A programmable input current limiting function allows precise control of peak switch current.  Peak switch current can be set to any value between 30mA and 500mA by adjusting one resistor. __ Linear Technology/Analog Devices App Note, Mar 24th 2010

5V to 12V AT 320mA Dual Supply Boost/Inverting Converter-  The LT3471 dual switching regulator combines two 42V, 1.3A switches with error amplifiers that can sense to ground providing boost and inverting capability.  The low VCESAT bipolar switches enable the device to deliver high current outputs in a small footprint.  The LT3471 switches at 1.2MHz, allowing the use of tiny, low cost__ Linear Technology/Analog Devices App Note, Jan 30th 2012

5V to 12V AT 550mA Split Supply at 1.5MHz-  The LT8582 is a dual independent channel PWM DC/DC converter with a power good pin and built-in fault protection to help guard against input overvoltage and overtemperature conditions.  Each channel consists of a 42V master switch and a 42V slave switch that can be tied together for a total current limit of 3A. __ Linear Technology/Analog Devices App Note, Jan 30th 2012

5V to 12V AT 80mA Split Supply-  The LT3582 series includes two monolithic converters, one Boost and one Inverting.  The Boost converter has an integrated power switch and output disconnect switch.  The Inverting converter uses a single inductor topology and includes an integrated power switch.  Both Boost and Inverting converters use a novel control scheme resulting__ Linear Technology/Analog Devices App Note, Jan 30th 2012

5V to 50V Low Noise APD Bias Power Supply with Temperature Compensation-  The LT3571 is a current mode step-up DC/DC converter designed to bias avalanche photodiodes (APDs) in optical receivers with an output voltage up to 75V.  The LT3571 features a high side fixed voltage drop APD current monitor with better than 10% relative accuracy over the entire temperature range.  The integrated power switch, __ Linear Technology/Analog Devices App Note, Mar 29th 2010

5V to 69V Low Noise APD Bias Supply with Soft-Start-  The LT3571 is a current mode step-up DC/DC converter designed to bias avalanche photodiodes (APDs) in optical receivers with an output voltage up to 75V.  The LT3571 features a high side fi xed voltage drop APD current monitor with better than 10% relative accuracy over the entire temperature range.  The integrated power switch, __ Linear Technology/Analog Devices App Note, Mar 29th 2010

5V to 85V Low Noise APD Bias Power Supply-  The LT3482 is a fixed frequency current mode step-up DC/DC converter with voltage doubler designed to bias avalanche photodiodes (APDs) in optical receivers.  It can provide up to 90V output.  The LT3482 features high side APD current monitoring with better than 10% relative accuracy over the entire temperature range.  The integrated__ Linear Technology/Analog Devices App Note, Mar 29th 2010

7V, 50mW OLED Driver from a 2V to 5.5V input-  The LTC3459 controls peak inductor current when VIN is greater than or less than VOUT.  This allows current to be controlled during start-up in a boost application or VOUT to be regulated below VIN when powered from a fresh battery.  Peak current control makes the LTC3459 an ideal candidate for charging a back-up source such__ Linear Technology/Analog Devices App Note, Mar 29th 2010

80V synchronous 4-switch buck-boost controller Delivers hundreds of watts with 99% efficiency-  EDN Design Ideas:  12/26/2014   An 80V synchronous 4-switch buck-boost controller that can provide hundreds of watts at up to 99% efficiency with a single inductor.  Four servo loops __ Circuit Design by LTC Design Note

A Simple Circuit step-up converter (6V to 12V)-  This step-up converter is intended for use in a '67 Citroen 2CV.  This car, and I use the word loosely, has a 6V battery and won't support a modern radio that needs 12V.  The circuit described here converts 6V to 12V at 1A sustained load current. __ Designed by Oscar den Uijl, odu @ xs4all.nl

A Step-Down Conversion Concept for a PWM-Mode Boost Converter-  TI App Note __

Add current boost to a USB charger-  09/19/02 EDN Design Ideas:  The popular USB interface can charge a portable device while transferring data.  But for high-capacity batteries, the 500-mA output current of USB hosts and powered hubs greatly extends the charging time. (Unpowered USB hubs supply nothan 100 mA. ] Thus, a system that accepts charging power from an ac adapter as well as the USB port isconvenient __ Circuit Design by Len Sherman, Maxim Integrated Products, Sunnyvale, CA

Add Extra Output to a Boost Converter-  11/17/11  EDN Design Ideas:  Designers use step-up-converter ICs in battery-powered portable equipment.  These chips usually provide one output with a fixed or an adjustable voltage.  Some chips contain an LBI/LBO (low-battery-in/low-battery-out) function.  The chip manufacturer intends __ Circuit Design by Vladimir Oleynik, Moscow, Russia

Application for a New Power Buffer-  AN4 The LT1010 150mA power buffer is described in a number of useful applications such as boosted op amp, a feed-forward, wideband DC stabilized buffer, a video line driver amplifier, a fast sample-hold with hold step compensation, an overload protected motor speed controller, and a piezoelectric fan servo. __ Linear Technology/Analog Devices

ArroW Lighting-TI DC/DC LED Driver Solution-  In this article, 2 lighting applications of TI TPS40211 will be presented.  TI TPS40211 is a DC/DC LED driver controller which accepts DC voltage up to 52V and is able to fit various kinds of LED lighting application including MR16
as well as streetlamp application. __ Designed by James Ho, Arrow Asia Pac

Atmel AVR Tiny13V for driving a white LED-  LED headlamp projects: Tiny13V microcontroller as step up (boost) or step down (buck) voltage converter for driving a white or high power LED. (pdf file) Design equations and source code included. __ Designed by Steven Weber, KD1JV

Audio Graphic Equalizer, 3-Band-  Using a single op-amp this easy to make equalizer offers three ranges, low frequency, mid frequency, and high.  With component values shown there is approximately +/-20dB of boost or cut at frequencies of 50Hz, 1kHz and 10kHz.  Supply voltage may be anything from 6 to 30 Volts.  Maximum boost 20dB is only realized with maximum supply voltage __ Designed by Andy Collison


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