Sorry about the pricing goof Gus On 2014m07d07, at 14:28, Bob Blick wrote: On Mon, Jul 7, 2014, at 12:58 PM, NOPE9 YES wrote: > TI has two parts that are in the $4 range ( singles ). Thousands, actually. 1ku =3D 1000 units. > They are switching regulators ( buck ) with built in FET switches , 4.5V > to 18V. > TPS544B20 and TPS544C20 > There is a modeling tool , eval board ( $50 ) , samples =85 > http://www.ti.com/product/TPS544B20 40 pin DFN package, 5x7mm. Lots of dissipation for such a small thermal pad. Not easy for casual breadboarding, hence the eval kit. Bob --=20 http://www.fastmail.fm - Access all of your messages and folders wherever you are --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .