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1 cell to 3v3

Discussion in 'Electronic Design' started by Anthony C Smith, May 5, 2006.

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  1. has anyone any advice/pointers on using one AA cell to get 3v3?
    I have looked at chips from Linear, Maxim and Nat Semi, but before plodding
    down a path with one would like to hear from users of these for pitfalls
    recomendations etc.
    I want to power a little audio amplifier for headphones from the cell, and
    want a single AA to keep the enclosure small.
    any advice or pointers to other methods gratefully appreciated.
  2. John Fields

    John Fields Guest

  3. John_H

    John_H Guest

    What current are you targeting? I'd expect there aren't many pitfalls
    associated with these devices. Just look for startup voltages that are
    compatible with low-battery conditions and efficiencies that will allow the
    one cell to last a while. You may be able to get a demo board for a
    reasonable price ($20?) from one of those companies.
  4. Joerg

    Joerg Guest

    Hello Anthony,

    What pitfalls? Look at the TPS61xxx family from Texas. Around a Dollar
    in quantities.

    Regards, Joerg
  5. Thanks - I didn't even know of these parts-
    BTW the current I am after is about 30mA, with peaks of 70 mA with audio
    (probably from storage caps inductor isolated from the feedback loop output
    cap to preserve stability)

    Does anyone know of a discreet version to save being manufacturer tied? or
    am I peeing in the wind?
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