SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE AND POWER SUPPLY SYSTEM

摘要

This semiconductor integrated circuit device is provided with: a first voltage terminal; a second voltage terminal; an output terminal; a high-side MOSFET connected between the first voltage terminal and the output terminal; a low-side MOSFET, which is connected between the output terminal and the second voltage terminal, and which has first and second gate electrodes; a drive circuit, which turns on/off the high-side MOSFET and the low-side MOSFET in a complementary manner; and a second gate electrode control circuit that forms a second gate control signal to be supplied to the second gate electrode of the low-side MOSFET. The second gate electrode control circuit is provided with a voltage forming circuit that supplies the second gate electrode of the low-side MOSFET with a negative voltage with respect to a voltage at the source of the low-side MOSFET.