10V from 9V battery

Discussion in 'General Electronics Chat' started by sudil99, Jun 19, 2012.

  1. sudil99

    Thread Starter New Member

    Mar 9, 2012
    15
    0
    How can I get 10V (or +5 and -5V) output with at least 100mA output current from a single 9V battery? I couldn't find any suitable IC.

    I thought of using a 5V regulator and then using a inverting regulator to get -5V. But 9 - 5 = 4V drop seems very inefficient.
     
  2. Ogu Reginald

    New Member

    Oct 13, 2011
    6
    0
    why is 9V inefficient, from the datasheet of regulators like the positive and negative ICs 7805 and 7905 (+ve and -ve respectively), inputting a voltage of 7V is good enough to produce the desired output. Why not try it may be using bread-board and give me a feedback I am waiting for you.
     
  3. sudil99

    Thread Starter New Member

    Mar 9, 2012
    15
    0
    according to my knowledge, input 9V - output 5V = drop 4V, which is converted into heat. so, it has efficiency of 55% only.
    plz, correct me if I am wrong.
     
  4. #12

    Expert

    Nov 30, 2010
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