Patent ID: 7687885

Claim:
A semiconductor device comprising: a conductive first chip mounting portion having a first main surface and a second main surface on an opposite side thereof; a first external terminal for supplying input power disposed near the first chip mounting portion; a second external terminal for supplying a reference potential disposed near the first chip mounting portion; a third external terminal integrally formed with the first chip mounting portion for providing an output; a first semiconductor chip mounted on the first main surface of the first chip mounting portion; a second semiconductor chip mounted on the first main surface of the first chip mounting portion; a first plate conductive component which electrically connects an electrode of the second semiconductor chip to the second external terminal; a second plate conductive component which electrically connects an electrode of the first semiconductor chip to the first external terminal; a second chip mounting portion having a first main surface and a second main surface on an opposite side thereof; a third semiconductor chip mounted on the first main surface of the second chip mounting portion; an n-channel vertical field effect transistor formed on the first semiconductor chip and the second semiconductor chip; a bonding wire which connects source electrode pads and gate electrode pads of the third semiconductor chip and the first semiconductor chip; a bonding wire which connects source electrodes and gate electrodes of the third semiconductor chip and the second semiconductor chip; and a sealing body which seals the first semiconductor chip, the second semiconductor chip, the third semiconductor chip, the first plate conductive component, the second plate conductive component, and the bonding wires, wherein the source electrode of the first semiconductor chip and a drain electrode of the second semiconductor chip are electrically connected to the first chip mounting portion, and wherein one electrode of a capacitor is electrically connected via a first connection layer to the first plate conductive component, and the other electrode of the capacitor is electrically connected via a second connection layer to the second plate conductive component.