Patent ID: 6586917
Filing Date: 2003-07-01
Classification: G05F

Abstract:
An apparatus that regulates a power source and provides an output current to a load, comprising:a first feedback circuit that is arranged to provide a first feedback signal in response to a first voltage that is associated with the power source; a second feedback circuit that is arranged to provide a second feedback signal in response to a second voltage that is associated with the load; an amplifier circuit that is arranged to provide a control signal when at least one of a first operating mode and a second operating mode is selected, wherein the first operating mode is selected in response to a first reference signal and the first feedback signal, and the second operating mode is selected in response to a second reference signal and the second feedback signal; and a shunt circuit that is arranged to selectively couple power from the power source to a circuit ground in response to the control signal when active such that the first feedback circuit, the amplifier circuit, and the shunt circuit are part of a first control loop, and the second feedback circuit, the amplifier circuit, and the shunt circuit are part of a second control loop.