piclist 2001\01\19\010721a >
Thread: Design challenge - switching regulator
www.piclist.com/techref/power/priswitch.htm?key=switching
picon face BY : Russell McMahon email (remove spam text)



>A new triangle, pehaps?
>Wide input range, high current output (greater than .1A), and low cost.
>Pick any two...


The irony is that it is only an inbuilt feature of the regulator IC that
limits the lower starting voltage in my current design. It starts at 9 volts
or so but there doesn't seem any good reason why it could not go quite a bit
lower. Once it starts I self power the IC from its own output (standard
practice) so the input voltage can drop to 2 or 3 volts as long as the input
supply can source the current peaks.

There is a battery involved but I can't rely on it being there and it's
voltage is almost always less than 9 volts.


RM

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<01d401c081dc$6d807fe0$0100a8c0@mkbs> 7bit

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