[sdiy] SSM2164 last time buys

[David G. Dixon]

> A decent system-wide method would be good if you have a known 5V
> supply. You set comparators for both +V and -V rail and feed those
> into an AND gate which uses a common line to turn on and off a pair of
> MOSFETs in series with the +/-V rails. Only when both +V and -V rails
> are stable and happy does the logic circuit turn on the FETs. Of
> course you'd need a pair of gate drivers as well to make sure they
> clamp on and off, but that's a small price to pay system-wide.

I'm really liking this idea!  I'm thinking that the +5V supply wouldn't even
necessary if the AND was done with Mickey Mouse logic.  This little circuit
could be put right on the power distro board in each cabinet.