Though I can't quite see the point, the datasheet  from Nat Semi, for 
the venerable 7805 shows how to turn one into a SMPS.

Colin
--
cdb, colin@btech-online.co.uk on 2/25/2010
 
Web presence: www.btech-online.co.uk  
 
Hosted by:  www.1and1.co.uk/?k_id=7988359
 

 
 
 
 

-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist