(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, and this simple
2-transistor regulator will work at very high efficiencies
and do the complete 5v SMPS buck conversion and regulation
in the one process. No 7805 needed.

I have made 3 "application" circuits, built and tested.
Anyone who needs a high efficiency 5v switching regulator
can simply copy my parts values and it will perform as
advertised. :o)

Already efficiency is better than a LM3485 (switcher chip
that was discussd here recently) over a decent current
range and LM3485 solution uses a FET where my "2-transistor
Black regulator" only uses a cheap BC327. I have had it to
over 91% with the BC327 and will try some high efficiency
tests later once I buy a few common P-FETs.

While i'm testing application circuits I am accepting
suggestions for applications and will build and test any
apps you might have for specific input and output voltages
and currents etc. :o)

It's here:
http://www.romanblack.com/smps.htm
-Roman

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