AVR-Chat

i found the UCC383-5 from TI. it is pin compatible with the 7805. input voltage from 5.5 to 9 V with 3 amps max output.

Zack Widup <w9sz@prairienet.org> wrote: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 Adsett 
To: AVR-Chat@yahoogroups.com 
Sent: Monday, October 18, 2004 10:38 PM
Subject: Re: [AVR-Chat] 7805 power supply


At 12:37 AM 9/25/04 -0400, you wrote:
<snip>

>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



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