Patent ID: 7538530

Claim:
A buck converter, comprising: a first high-side switch circuit, having a first high-side switch input terminal electrically connected to a first power input terminal, a first high-side switch control terminal electrically connected to a first control signal source, and a first high-side switch output terminal; a second high-side switch circuit, having a second high-side switch input terminal electrically connected to a second power input terminal, a second high-side switch control terminal electrically connected to a second control signal source, and a second high-side switch output terminal, the second high-side switch output terminal being electrically connected to the first high-side switch output terminal; a lower-side switch circuit, having a first lower-side switch terminal electrically connected to the first high-side switch output terminal and a second lower-side switch terminal electrically connected to a reference power terminal; and a filter circuit, having a filter input terminal electrically connected to the first high-side switch output terminal, and a filter output terminal electrically connected to a power output terminal; wherein the first control signal source and second control signal source make the first high-side switch circuit and the second high-side switch circuit not turned on at the same time, and the lower-side switch circuit further comprises: a third lower-side switch terminal; and a NOR gate, having a NOR gate output terminal and a plurality of NOR gate input terminals, wherein the NOR gate output terminal is electrically connected to the third lower-side switch terminal, and the plurality of NOR gate input terminals are electrically connected to the first and second control signal sources, respectively.