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Boost / Step Up Power Supplies, Page 2
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Last Updated on: Saturday, April 26, 2008 07:30 AM

Boost,    Buck,    Buck-Boost,    Switchmode

Power Supplies -- Main Page           Converters -- Main Page

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

0.6/1.6 MHz Boost Converters with 22V Inrternal FET Wsitch in SOT-32:  National Semiconductor Application Note LM2731 July 2003 (app note added 7/06)

1 Watt 5 Volts Power Booster for the MLX90121:  Melexis Application Note  (app note added 2/06)

2-Phase Boost Converter Delivers 10W from a 3mm x 3mm DNF Package:  DN354 -  Design Notes (Linear Technology)  (app note added 1/06)

2-Transistor Amplifier:  A simple two-stage Amplifier. Use any general-purpose NPN with high gain. It will drive low impedance headphones directly. A speaker will probably require further boost.  (added 10/05)

3 Output TFT LCD Bias Supply with a Boost Regulator - MP1542 - DN0005:  Monolithic Power Systems, Inc - Design Note - (added 6/06)

3.3V converter delivers 3W from Li-ION battery :  11/05/98 EDN-Design Ideas  / (added 11/05)   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 can be higher or lower than 3.3V. When fully charged, a Li-ion cell has approximately 4.2V output; when fully discharged, the voltage is approximately 2.5V. Therefore, you cannot use a simple buck or boost topology with a single inductor to generate a regulated 3.3V output. Some designs boost the voltage to approximately 4.3V and then use a low-dropout regulator to produce the 3.3V. This approach is inefficient, and efficiency is a crucial consideration in battery-powered applications. The circuit in Figure 1 offers a solution to the problem....

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. (added 4/05)

3MHz Micropower Synchronous Boost Converters Deliver 3W from Two Cells in a Tiny MSOP Package:  DN246 -  Design Notes (Linear Technology) (app note added 2/06)

4-Phase Monolithic Synchronous Boost Converter Delivers 2.5A with Output Disconnect in a 5mm x 5mm QFN Package:  DN332 -  Design Notes (Linear Technology) (app note added 2/06)

500kHz 6monolithic Boost Converter (LT1370):  DN183 -  Design Notes (Linear Technology) (app note added 1/06)

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