Patent ID: 8536847

Claim:
A semiconductor device comprising: a high-side switching element and a low-side switching element totem-pole-connected in this order from a high-voltage side between a high-voltage-side potential and a low-voltage-side potential; a high-side drive circuit including a high-voltage terminal and a low-voltage terminal which are connected to a floating power supply, the high-side drive circuit supplying one of a voltage at the high-voltage terminal and a voltage at the low-voltage terminal to the high-side switching element to drive the high-side switching element; a low-side drive circuit driving the low-side switching element; a reference voltage circuit generating a reference voltage between the voltage at the high-voltage terminal and the voltage at the low-voltage terminal of the high-side drive circuit and supplying the reference voltage to a connection point between the high-side switching element and the low-side switching element; and a charging switching element having a control terminal, a first terminal connected to the low-voltage terminal of the high-side drive circuit, and a second terminal grounded.