Patent ID: 8203380

Claim:
A semiconductor device comprising: a high-side switch having a drain electrically connected to an input power supply potential and a source electrically connected to an output wire; a high-side driver for driving the high-side switch, electrically connected to an external bootstrap capacitor; a low-side switch having a drain electrically connected to the output wire and a source electrically connected to a reference potential wire; and a low-side driver for driving the low-side switch, electrically connected to an external drive capacitor, the high-side switch, the high-side driver, the low-side switch, and the low-side driver being formed on the same semiconductor substrate, wherein the high-side driver is arranged on a periphery side of the high-side switch in a region closer to a first periphery of the semiconductor substrate than the high-side switch; the low-side driver is arranged on a periphery side of the low-side switch in a region closer to a second periphery of the semiconductor substrate than the low-side switch, the high-side driver is arranged between the bootstrap capacitor and a region where the high-side switch is formed, the low-side driver is arranged between the drive capacitor and a region where the low-side switch is formed, and the periphery side of the high-side switch and the periphery side of the low-side switch are oppositely positioned to each other so as to sandwich the high-side switch and the low-side switch therebetween.