Patent ID: 7852651

Claim:
A semiconductor device including a DC-DC converter, comprising: a first semiconductor chip including a high-side MOSFET of the DC-DC converter, the high-side MOSFET including a source, a gate and a drain; a second semiconductor chip including a low-side MOSFET of the DC-DC converter, the low-side MOSFET including a source, a gate and a drain; a third semiconductor chip including a driver circuit to drive a gate of the high-side MOSFET and a gate of the low-side MOSFET; a resin encapsulator encapsulating the first, second and third semiconductor chips; an input power supply terminal, exposed from the resin encapsulator, for supplying an input power to the DC-DC converter; a reference potential supply terminal, exposed from the resin encapsulator, for supplying a reference potential to the DC-DC converter; and an output terminal exposed from the resin encapsulator, for outputting an output of the DC-DC converter, wherein the high-side MOSFET and the low-side MOSFET are electrically coupled in series between the input power supply terminal and the reference potential supply terminal, wherein a source-to-drain path of the high-side MOSFET is electrically coupled in series between the input power supply terminal and the output terminal, wherein a source-to-drain path of the low-side MOSFET is electrically coupled in series between the reference potential supply terminal and the output terminal, and wherein the first semiconductor chip and the second semiconductor chip are electrically and mechanically coupled to a metal material which is electrically coupled to the output terminal.