I think this is the IC that Microchip uses in the Picstart + and the old 16B to generate
the progamming voltage.
>     What seens to be a very good solution is the NationalSemi's LM78S40
> (http://www.national.com/pf/LM/LM78S40.html). It's on the market for a
> long time and costs (according to National's page) US$0.80 in 1K
> quantities. So it's too much cheaper than LT1173 and LT1176.
>
>     Also, I'm re-reading the PicList thread about low power step-down
> switching, but I can't make the circuits proposed to work according either
> simulated or in real-word.
>
>     Any sugestions? Is someone here using the 78S40?
>

--
http://www.piclist.com hint: The list server can filter out subtopics
(like ads or off topics) for you. See http://www.piclist.com/#topics