Hi David, thanks for the nice words. For 1A maximum
I think I would use 2x BC327 in parallel and 2x 1N5819
in parallel. This is still smaller and cheaper than
just about any alternative.

I'm going to hunt for some cheap small low-Rds P-FETs,
and see how it goes. :o)
-Roman



David Harris wrote:
>
> Wow Roman, this looks great.  Nice website!
> For higher amperage, can one substitute a more robust transistor for the
> BC327.  Eg, for 1A, what would you use?
> Thanks for your continuous stable output -- umm kinda like the SMPS!
> David
>
> Roman Black wrote:
>
> > (posted on [EE] too)
> >
> > I have done some more testing on my new 2-transistor
> > SMPS 5v regulator, and it continues to look good. :o)
> >
> > Regulation is now good enough that there is no need for
> > a secondary regulator like a 7805,
> > Already efficiency is better than a LM3485 (switcher chip
> > that was discussd here recently) over a decent current
> > range
> > http://www.romanblack.com/smps.htm

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