7805
http://www.st.com/stonline/products/literature/ds/2143.pdf
page34/56 fig27 max35V input

On 6/25/08, Jinx <joecolquitt@clear.net.nz> wrote:
> http://www.onsemi.com/pub_link/Collateral/AN920-D.PDF
>
>  http://www.onsemi.com/pub_link/Collateral/MC34063A-D.PDF
>
> MC34063 does it for me. For what you want just about any cheap
> buck switcher would do. But you don't specify other conditions.
> If you're not fussy about efficiency it's possible to drop (eg pre-
> regulate with a zener or just brute force with a resistor) the i/p
> voltage and use any oscillator, even a 555 or a PIC for example,
> as a switcher
>
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