Wow, these are nice, though 10x the price of a 7805.  I'll have to
pick up a couple to experiment with.

Thanks.

----- Original Message -----
From: "Dal Wheeler" <dwheeler@INSIGHTEK.NET>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Wednesday, April 03, 2002 4:39 PM
Subject: Re: [EE]: 7805 heating up...


> How tight for space are you?  The space you described earlier as your
"heat
> sink" could fit a surface mount switcher circuit on it.  Even if you
wanted
> to stay in though-hole packages you could comfortably fit it in < 1"x.75".
> Check national semi's "simpleswitcher" line...
> http://www.national.com/pf/LM/LM2672.html
>
> Linear, TI,  and a number of others have similar products.  Of course,
SMPS
> costs are still significantly higher than a 7805....
>
> Back to using a 7805, I've mounted these on the edge of the board to allow
> case contact with the metal enclosure with pretty good results before.
>
> ----- Original Message -----
> From: Pic Dude <picdude@AVN-TECH.COM>
>
>
>
> > > Why are you using the 7805 this way? There are other ways to get 5V
out
> of
> > > 12.....
> >
> > Such as ???  I'm sure you are not referring to just a zener, are you?  I
> > thought of
> > DC-to-DC converters, but space was an issue, and the ones I found are
not
> > too
> > small.
>
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>
>

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