Patent ID: 7821114

Claim:
A multiphase synchronous buck converter with at least four dice and at least ten leads comprising: a first die with a first source, a first gate, and a first drain, wherein the first die is attached to a first die attach pad which is integral with a second die attach pad, the second die attach pad being disposed parallel to but in a different plane from the first die attach pad; a second die with a second source, a second gate, and a second drain, the second drain is electrically connected to the first source, the second die being disposed on a third die attach pad that is disposed parallel to but in a different plane from both the first and second die attach pads; a third die with a third source, a third gate, and a third drain; a fourth die with a fourth source, a fourth gate, and a fourth drain, the fourth source is electrically connected to the third drain; a first lead electrically connected to the first gate; a second lead electrically connected to the first source and the second drain; a third lead electrically connected to the second source; a fourth lead electrically connected to the second gate; a fifth lead electrically connected to the first drain; a sixth lead electrically connected to the third gate; a seventh lead electrically connected to the third source; an eighth lead electrically connected to the third drain and fourth source; a ninth lead electrically connected to the fourth gate; and a tenth lead electrically connected to the fourth drain.