Patent ID: 7995319
Filing Date: 2011-08-09
Classification: H03K

Abstract:
1. A semiconductor device, comprising: an output MOS transistor having a drain connected to a power source terminal, a source connected to an output terminal and a gate receiving a gate control signal from a gate control circuit; a sense MOS transistor having a gate and a drain which are connected to the gate and the drain of the output MOS transistor, respectively, and a source; a voltage conversion circuit connected between the source of the sense MOS transistor and the output terminal, and converting a sense current flowing through the sense MOS transistor into a sense voltage; and a control MOS transistor having a gate and a source which receive the sense voltage therebetween and a drain connected to the gate of the output MOS transistor, wherein the voltage conversion circuit includes: a first MOS transistor diode-connected; and a second MOS transistor, connected in series to the first MOS transistor, and having a gate connected to the gate control circuit.