Patent ID: 7495421

Claim:
A multi-phase buck converter, comprising: a first switch set for providing an input voltage or a low voltage; a second switch set for providing the input voltage or the low voltage; a capacitor, wherein one end of the capacitor is connected to the low voltage and the other end of the capacitor generates an output voltage; a first power storing and coupling unit, which is coupled between the capacitor and the first switch set and generates a first current, wherein the first power storing and coupling unit comprises a primary coil, and a first inductance which stores power according to the input voltage, one end of the primary coil is coupled to the first switch set, the other end of the primary coil is coupled to one end of the first inductance, and the other end of the first inductance is coupled to the capacitor; and a second power storing and coupling unit, which is coupled between the capacitor and the second switch set and generates a second current; wherein, the first current is in increasing state and drives the second current to increase; and, the second current is in increasing state and drives the first current to increase.