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1 cell to 3v3

  • Thread starter Anthony C Smith
  • Start date
A

Anthony C Smith

Jan 1, 1970
0
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.
regards
Anthony
 
J

John_H

Jan 1, 1970
0
Anthony C Smith said:
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.
regards
Anthony

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.
 
J

Joerg

Jan 1, 1970
0
Hello Anthony,

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.


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

Regards, Joerg
 
A

Anthony C Smith

Jan 1, 1970
0
Joerg said:
Hello Anthony,
What pitfalls? Look at the TPS61xxx family from Texas. Around a Dollar
in quantities.

Regards, Joerg
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?
Anthony
 
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