On Thu, Aug 2, 2012 at 12:03 PM, Bob Blick wrote: > I'm looking for a switching regulator chip. Something inexpensive like > the MC34063, but not limited to 100 KHz because I need to reduce the > physical size of my layout, especially the inductor. Not having to use a > current sense resistor would be nice too. > > The basic operating parameters will be 8V in, 3.3V out, at 1 amp. > > It doesn't have to be as cheap as the 34063, three times as much (US > prices) would be OK if the rest of it were fantastic. > > Any suggestions? > > Thanks, > > Bob There's a relatively new microchip switcher IC that does buck mode. I was going to look up the part number but I can't get the microchip website to work. Perhaps someone already mentioned the *3063 which is the "advanced" 34063. http://www.onsemi.com/pub_link/Collateral/NCP3063-D.PDF $0.68 at 100 qty. --=20 Martin K. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .