Patent ID: 8884593

Claim:
A voltage converter, comprising: an inductor, coupled between a power supply and a reference voltage for providing a supply voltage; a plurality of output capacitors, coupled to both sides of said inductor, respectively, and receiving said supply voltage for producing a positive voltage and a negative voltage; a plurality of output switches, coupled to both sides of said inductor, respectively, and controlling said inductor to charge said plurality of output capacitors; a voltage sensing unit is coupled to both terminals of said inductor to detects the voltage across said both terminals of said inductor for producing a voltage detecting signal; a feedback control circuit, producing a control signal according to said voltage detecting signal, said positive voltage and said negative voltage for controlling said plurality of output switches; and a plurality of current sensing units coupled to a plurality of control switches for detecting a current of said plurality of control switches and producing a current sensing signal, said feedback control circuit receiving said current sensing signal and said voltage detecting signal, and controls said plurality of output switches according to said current sensing signal and said voltage detecting signal without requiring another input clock signal for controlling on/off of said plurality of output switches.