low power switching regulator


Posted on Feb 4, 2014

This circuit is a simple battery-powered switching regulator provides 5V out from a 9V source with 80% efficiency and 50-mA output capability. When Q1 is oon, its collector voltage rises, forcing current trhough the iinductor. The output voltage rises, causing A1`s output to rise. Q1 cutts off and the output drops low enough for A1 to turn Q1.


low power switching regulator
Click here to download the full size of the above Circuit.

The 1 uF capacitor ensures low battery impedance at high frequencies, preventing sag during switching. See schematic diagram below :




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    7-segment display with encoder
    Carrier current receiver
    Universal-battery-charger
    Injector Pulse Width Monitor with LM324 LM3914
    avr programmer
    op amp lm741 pre amp mic schematic
    Touch Switch Circuits
    PLL SINGLE TONE DECODER
    computer c64



    Top