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DPRG: PowerTrends 7805 switching regulator replacement

Subject: DPRG: PowerTrends 7805 switching regulator replacement
From: Daniel Herrington daniel at adc.nsc.com
Date: Thu Jan 15 10:56:51 CST 1998

You may be able to get a couple of samples for free from the
manufacturer.  Always give them a call first and ask before
spending your own money.

Daniel Herrington



=> Replying to Larry Kerns's message, "Re: DPRG: PowerTrends 7805 switching regulator replacement" (Jan 15):
 > Jim Brown wrote:
 > > 
 > > Have yall seen these drop in switching regulator replacements for
 > > the 78xx series?
 > > 
 > > They're a little bigger, it is pinout compatible (input, common, output),
 > > they're about 85% efficient, plus, they're rated for 1.5a.
 > > 
 > > http://www.powertrends.com/pages/pt78st1.html
 > > 
 > > The part numbers go like 78st1xx where they're equivalent to 78xx parts.
 > > 
 > > For example, the 78st105 is equivalent to the 7805.
 > > 78st112 is equivalent to the 7812.
 > > 
 > > It says it _requires_ a 100uf cap, but I guess power supply designs
 > > should have a hefty cap anyway.
 > > 
 > > Anyone off hand know of the street price, or who has them?
 > ===========================================================
 > Jim,
 > Digikey carries them at $18.38 each in single quantities.  Go to Digikey
 > and search for 78st105.  They sell both the horizontal and vertical
 > models.
 > -- 
 > Will I Dream?
 > 
 > Larry W. Kerns
 > kerns at lonestar.rcclub.org
 > 
 > 

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