Re: [Gumstix-users] Gumstix Power and Custom Design

[Dave H. <dhy...@gm...>]

Hi Demetris,

On 11/24/06, Demetris <fgc...@cy...> wrote:
> Wouldn't the LM2574HVM-5.0 do the job for me?

Personally, I'd use the newer LM2674 over the 2574. Is 0.5A enough?

Let's use the LM2675 since it can go upto 1A. If you go to the
national web site and use the webbench it will produce a design for
you.
http://www.national.com/pf/LM/LM2675.html
If you punch in say 20v to 30v, 5v out at 0.8A, it comes up with a
list of parts.

It looks like it's only about $7.20 in parts.

Two things have happened since I last looked at this (about a year
ago). National has dramatically improved the parts selection that
their WebBench SW produces, and the prices/availability of the
components has dropped dramatically as well.

So I take it back. Using something like the LM2675 is quite a viable option now.

Make sure you follow the layout recommendations and you'll be good to go.

-- 
Dave Hylands
Vancouver, BC, Canada
http://www.DaveHylands.com/