Came across this design, even better than the ON Semi that still requires a=
 transformer.
   =

  http://www.supertex.com/pdf/datasheets/SR08x.pdf
   =

  You can get a regulated 3.3V or 5V @60mA, plus an adjustable 9-50VDC  100=
mA(adjustable using a divider network to a feedback pin) output.  Downside =
is its only 55% efficient, but for the size its not bad.  And I think...is =
a bit better than just the LC type supplies, not as cheap but perhaps more =
robust.
   =

  Anyone care to comment...good and bad on this app note?
   =

  My only issue is I need 5V and 3.3V so looks like the 9V gets dropped usi=
ng either an LDO or small switcher.  I need 50mA at 3.3V, and 30mA at 5V
   =

  -Al

 		=

---------------------------------
Talk is cheap. Use Yahoo! Messenger to make PC-to-Phone calls.  Great rates=
 starting at 1=A2/min.
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