How about National Semi's LM22678-5.0? Simple and relatively low cost, but I'm sure they'll have others with a lower parts cost (though more components). http://www.national.com/pf/LM/LM22678.html Cheers, -Neil. Quoting Philip Pemberton : > Hi guys, > > Does anyone have a favourite 5V/5A switch-mode PSU controller chip? > ... > ... -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist