Patent ID: 8044520

Claim:
A semiconductor device comprising: a high-side switching device; a low-side switching device; a driver IC controlling to turn on and off the high-side switching device and the low-side switching device; an input side plate lead portion, to which an input side voltage is electrically applied, which is electrically connected to an electrode in a back surface side of the high-side switching device, and which mounts the high-side switching device thereon; an output side plate lead portion, to which an output side voltage is electrically applied, which is electrically connected to an electrode in a back surface side of the low-side switching device, and which mounts the low-side switching device thereon; a driver side plate lead portion, which mounts the driver IC thereon; and a ground side plate lead portion, to which a ground side voltage is electrically applied, and the high-side switching device, the low-side switching device, the driver IC, the input side plate lead portion, the output side plate lead portion, the driver side plate lead portion, and the ground side plate lead portion being stored in one package, wherein a gate terminal of the low-side switching device is provided in a first line side facing one side of a plane of the driver IC among sides of a plane of the low-side switching device, in the output side plate lead portion, a third facing region where a first facing region facing the high-side switching device toward the high-side switching device side longer than a second facing region facing the driver IC is provided, in the third facing region, a conductive member electrically connecting a terminal in a front surface side of the high-side switching device and the output side plate lead portion is provided, and a length of a first conductive member connecting an output terminal of the driver IC and a terminal of the low-side switching device is shorter than a length of a second conductive member connected the output terminal of the driver IC and a terminal of the high-side switching device.