>Schottky diodes can be appropriate in power supplies.  The biggest
>impediment to more widespread use is their large reverse leakage current.
>Even relatively "little" 1A diodes can have 20mA reverse leakage.  This
>tends to be highly temperature dependent, so thing may appear to work fine
>in the lab but fail in a less controlled environment.

Interesting... That's one of those "little" things that wasn't mentioned in
a power supply basics course I took recently.  Virtually every problem
relating to SMPSs assumed the use of a Schottky diode, but no mention was
made of reverse leakage current.

--Brendan

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