I could be totally wrong here but last time I looked at the LM2940 it needed 
some pretty expensive low esr caps to stop any oscillating. Worth double 
checking before buying a load.

Dom
----- Original Message ----- 
From: "Harold Hallikainen" <harold@hallikainen.org>
To: "Microcontroller discussion list - Public." <piclist@mit.edu>
Sent: Tuesday, May 01, 2007 6:42 PM
Subject: Re: [EE] Favorite cheap, small automotive rated voltage regulator?


> Thanks for the comments thus far! In this application, size matters, as
> does cost. Adding a bunch of extra parts around a 7805 seems to drive up
> cost and board space. I'm looking at the LM2940, which is $0.886 in 1k
> quantities. The LM2936 looks similar, but is 50mA instead of 1A and,
> according to http://www.findchips.com, looks a bit more expensive.
>
> THANKS for the comments!
>
> Harold
>
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