Patent ID: 7554209
Filing Date: 2009-06-30
Classification: H01L,H02M,H05K,Y02B

Abstract:
1. A semiconductor device including a DC-DC converter, comprising: a first semiconductor chip including a high side MOSFET of the DC-DC converter, the first semiconductor chip having a first gate electrode pad, a first source electrode pad, and a first drain electrode; a second semiconductor chip including a low side MOSFET of the DC-DC converter, the second semiconductor chip having a second gate electrode pad, a second source electrode pad, and a second drain electrode; a third semiconductor chip including a first driver circuit to drive the high side MOSFET and a second driver circuit to drive the low side MOSFET, the third semiconductor chip having a first electrode pad and a second electrode pad; a resin body covering the first, second, and third semiconductor chips; and a metal plate conductor which is electrically and mechanically connected to the first source electrode pad of the first semiconductor chip, wherein the first electrode pad of the third semiconductor chip is electrically coupled to the first gate electrode pad of the first semiconductor chip, wherein the second electrode pad of the third semiconductor chip is electrically coupled to the second gate electrode pad of the second semiconductor chip, wherein the first source electrode pad of the first semiconductor chip and the second drain electrode of the second semiconductor chip are electrically coupled to each other through the metal plate conductor, wherein a first bonding wire is bonded to the first gate electrode pad of the first semiconductor chip, wherein the first semiconductor chip has a rectangular shape in plan view, with a pair of long sides and a pair of short sides, and wherein the first bonding wire is disposed so as to overlap one of the short sides of the first semiconductor chip.