Patent ID: 6515460
Filing Date: 2003-02-04
Classification: H02M

Abstract:
An apparatus for a multiphase switching regulator control architecture that has low on time and enforces current sharing, comprising:an oscillator circuit configured to produce a first oscillation signal corresponding to a first phase and a second oscillation signal corresponding to a second phase; a control circuit that includes a first input that is coupled to the first oscillation signal, a second input that is coupled to the second oscillation signal, a third input that is coupled to an error signal, a fourth input that is coupled to a first node, the first node coupled to a first current source, a fifth input that is coupled to a second node, wherein the second node is coupled to a second current source, a first output that is arranged produce a first control signal in response to the first current source, the first oscillation signal, and the error signal, and a second output that is arranged to produce a second control signal in response to the second current source, the second oscillation signal, and the error signal; a switching circuit that includes a first input that is coupled to the first output of the control circuit, a second input that is coupled to the second output of the control circuit, a first output that is arranged to couple a first signal to a third node in response to the first control signal, and a second output that is arranged to couple a second signal to a forth node in response to the control signal; a first inductor that is coupled between the third node and a fifth node; a second inductor that is coupled between the fourth node and a sixth node; and a current sharing circuit that includes a first input that is coupled to the fifth node, a second input that is coupled to the sixth node, a first output that is arranged to produce a first compensation signal at the first node; and a second output that is arranged to produce a second compensation signal at the second node; wherein the first compensation signal and second compensation signal are used to equalize a first current relating to the first phase and a second current relating to the second phase.