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5vdc to 3.8vdc step down

Discussion in 'General Electronics Discussion' started by StealthRT, Mar 30, 2013.

  1. StealthRT


    Sep 4, 2010
    Hey all i am in need of some help with stepping down a 5vdc to 3.8vdc so that i can power my phone.

    The battery that's powering the phone is rated at 3.8vdc 1730mAh 6.57Whr.

    What all would i need in order to step down from the 5vdc to around the 3.8vdc mark?

    The USB 5vdc is rated at 5.1vdc 2.1A.

    Any help would be great! :)
  2. CocaCola


    Apr 7, 2012
    Why not just plug the 5V into the phones charging port, almost all phones are 5V input now on the charging port?

    If you want a quick an dirty, use two diodes in series, or use a zener diode configured to fix the voltage, a quick Google search will reveal how...

    You could also use a low drop out regulator if you can find a suitable one...
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