Patent ID: 6278264
Filing Date: 2001-08-21
Classification: H01L,H02M

Abstract:
A voltage regulator having an input terminal and an output terminal, comprising:a printed circuit board;a substrate mounted on the printed circuit board;a first flip-chip type integrated circuit chip mounted on the substrate, the first integrated circuit chip including a first power switch fabricated therein to alternately couple and decouple the input terminal to the output terminal, wherein the flip-chip type integrated circuit chip includes a p-type region and an n-type region, and the first power switch includes a plurality of p+ regions fabricated in the n-type region in a first array, and a plurality of n+ regions fabricated in the p-type region in a second array, and wherein alternating p+ regions are connected to the input terminal and to an intermediate terminal, and alternating n+ regions chip are connected to the intermediate terminal and to ground;a filter disposed to provide a substantially DC voltage at the output terminal; anda control circuit to control the power switch to maintain the DC voltage substantially constant.