> > > Linear solutions are not acceptable.
> >
> > The best solution I can think of is to use an LM317 in current mode - total
> > of 2 components for a fixed current source, the LM317 and a resistor to set
> > the current.

The 317 is a linear solution. What I'm trying to avoid is blowing away
significant power in a resistor, or other linear device.

PWM is fine, but I don't have much space or time to spend getting there.

> David, have mercy and spit the problem entirely... when will be the
> satellite launched ?

:)  Not a sattelite.

> Will be necessary 10...100mA at -200C in condensed acid atmosphere ?

No, relatively normal environment.  I'm just trying to save power is all.


The ideal solution would be a two terminal device that will sink a
settable current in that range.  I can feed it 5V or 9-12V as power.
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