Look at National Semiconductors site. ICs LM2756 and LM2754 depending
on your current draw. Also look at application notes that will come
up.

Henryk Birecki

John Ferguson . co.uk
wrote:

Some time ago I noticed in a post a link to a DC/DC
converter IC. I'd like to investigate these and would
appreciate a repost if possible. I have tried searching
the archives but can't come up with the right search
phrase or the post is older than I remember.

Thanks,

John