Patent ID: 7238992
Filing Date: 2007-07-03
Classification: H01L,H02M,Y02B

Abstract:
1. A semiconductor integrated circuit for a DC—DC converter comprising: a CMOS inverter configured to switch a DC input voltage, for providing an output to an inductive load therein, and a feedback control system for generating a control voltage responsive to an output voltage to be fed back to said CMOS inverter, repeating the switching so as to finally obtain a desired DC output voltage, said semiconductor integrated circuit comprising transistors constituting said CMOS inverter and other transistors constituting said feedback control system, said transistors and said other transistors being integrated on a same semiconductor substrate therein, wherein an nMOS-type transistor which is one of said transistors constituting said CMOS inverter is formed on said semiconductor substrate through a semiconductor region electrically insulated from said other transistors constituting said feedback control system.