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Thread: Power handling for a sleeping PIC system
www.piclist.com/techref/power.htm?key=power
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face BY : Wagner Lipnharski email (remove spam text)



Anand Dhuru wrote:
{Quote hidden}

This can give you some ideas. Performance is horrible, and if switching
time is slow the transistors will collapse.
Much better designs can be done. Perhaps the use of a commercial charge
pump or even a coilled step up system, check the very low cost MC34063.


        3VCC
         o
         |   D        D      Vout <+5.5V
   .-----o--->|---o--->|---o------>
   |     |        |        |
   R     |        |        |
   |     E        |+       |+
   o---B PNP     ===      ===
   |     C       ---      ---
   R     |        |        |
   |     |        |        |
o---o     o--------'       _|_
   |     |
   R     |
   |     C
   o---B NPN
   |     E
   R     |
   |     |
   '-----o
         |
        _|_
{Quote hidden}

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