piclist 2002\09\24\164552a >
Thread: 2-tran SMPS 5v reg now 90% efficicient!
face BY : Russell McMahon email (remove spam text)

Nice little (literally) device but ...

WARNING: Note that in shutdown the IC draws typically 0.01 uA *BUT* the
output voltage is a diode drop less than the input !!! Unless care is taken
to ensure that the load does not draw current at this voltage the battery
will continue to be drained.



Example 1 Li-Ion cell to whatever converter.
From http://www.national.com/ds/LM/LM2703.pdf :

The LM2703 is a micropower step-up DC/DC
(Li-Ion 12V Application - attached .gif)
- 2.2V to 7V input range
- 0.015A shutdown current

myke predko wrote:
> ...I'd love to have something cheap that would allow
> me to drive a PICmicro MCU from a "AA" battery or to
>create Vpp voltage in a programmer circuit...

http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

<007301c2640b$73a05360$a82900ca@lucy> 8bit

See also: www.piclist.com/techref/microchip/devices.htm?key=pic
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Subject (change) 2-tran SMPS 5v reg now 90% efficicient!

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