On 5/23/07, Russell McMahon <apptech@paradise.net.nz> wrote:
> > I'm looking for a single chip voltage regulator capable of
> > supplying -60V
> > from a -75V supply. The minimum output current can be anything above
> > 150mA.
> > I suppose I'm looking for something like the TL782 voltage regulator
> > which
> > regulates up to about +125 V with the output being set by two
> > resistors. I
> > would prefer not to build from discretes, but might have to go that
> > way.
>
> Almost any negative 3 terminal regulator able to tolerate 15
> differential in operation could probably be used. Car that it didn't
> get overstressed during startup/shutdown or with large load or input
> transients may be required.
>
> The olllllllllllllllllld LM723 would almost certainly be up to this
> (it's the universal voltage regulator from when there were so few that
> a universal one was needed :-) ).
> If you can't do it (whatever it is) with a 723 you're asking the wrong
> question :-)

Indeed. But I have doubt he will ever use it. Mostly because he asked
for a three terminal negative regulator and I have answered he could
use a three therminal positive regulator as a negative regulator, but
I don't know if he understood my english...

Vasile
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