I got a dozen or so LT1074/LT1076's very cheap at a
hamfest. They are 5-pin TO-220 devices. These are great for a switching
supply that puts out 5 volts for 10 to 40 volts in. With a split
inductor circuit you can get 10 amps out at 5 volts with the 1074. I
usually only need a couple amps at most for a circuit, so the straight inductor
circuit Linear has in their data sheet works well enough for me.
Zack
----- Original Message -----From: Robert AdsettSent: Monday, October 18, 2004 10:38 PMSubject: Re: [AVR-Chat] 7805 power supplyAt 12:37 AM 9/25/04 -0400, you wrote:
>As far as a switching replacement you might take a look at these
>
>http://focus.ti.com/lit/ds/symlink/pt78st105.pdf
>
>I've not used them so I can't say how good they are. You would need to
>check their thermal performance but a quick glance looks good. I'm not
>100% sure they fit in a to-220 outline but if I am remembering correctly
>the rep that pointed them out to me once upon a time said they either did
>or were close.
A followup to an old post on the assumption there are a few people here who
may be interested. I ran across this switching replacement for a 7805
while looking for shunts and associated panel meters.
http://store.datel.com/cgi-bin/datel.storefront/417488ce057cc09c271d0c9f89420719/UserTemplate/1?BodyContent=newdpm#dpm1
I particularly like the wording "Prices start at $4.95 for huge quantities".
Robert
" 'Freedom' has no meaning of itself. There are always restrictions,
be they legal, genetic, or physical. If you don't believe me, try to
chew a radio signal. "
Kelvin Throop, III