You can take a look in National Simple switcher list. This kind of DC/DC
converter (LM2596...) are very easy to integrate in a design.
The biggest problem will be the place allowed for the complete regulator.
Moreover, you will find a lot of nice application notes on this kind of
regulators.

Nicolas



> I /was/ going to run my entire PIC project with a 7805 but
> have discovered that two of my components want 3.3V.  One
> of them draws 133ma and the other draws 200ma-2A,
> depending on what it is doing.
>
> Does anyone know of a small device, preferably SMT, that
> can provide, say, 2.5A at 3.3V from a 12V supply?
>
> Thanks!
>
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