IMSAI News?

From: Tim Shoppa <classiccmp_at_trailing-edge.com>
Date: Mon Jun 17 20:14:35 2002

> If you poke around in the DigiKey catalog a little bit I'll be you can find
> the TO-220 switchers that somebody or other sells.

Yeah, Powertrends (now owned by TI) makes them. I prefer the NatSemi
simple switchers over the all-in-one one Powertrend units, which are
are largish chunks of epoxy and metal on the end of three TO-220 legs.

> Another problem is that the small switchers still only put out about
> a half to maybe one ampere, and I've got a few S-100 boards that have two or
> three three three-amp regulators on them.

The 150kHz and 250kHz NatSemi units are 5-legged TO-220's and do 3A and
5A quite comfortably. You need room for the inductor, of course, but
small ones are very readily available.

Tim.
Received on Mon Jun 17 2002 - 20:14:35 BST