CPC G05F 1/56 (2013.01) | 16 Claims |
1. A power management integrated circuit, comprising:
a first regulator configured to provide a first output signal to a component;
a second regulator configured to provide a second output signal to the component;
a third regulator configured to provide a third output signal to the component;
a power tracker configured to track first, second and third output signals, aggregate an offset voltage with a selection signal, and generate a reference voltage, wherein the selection signal corresponds to one of the first, second and third output signals; and
a sub-regulator configured to generate an input voltage corresponding to the reference voltage and provide the generated input voltage to the first, second and third regulators,
wherein the power tracker comprises:
a current generator configured to generate an offset current according to a reference control signal;
an impedance unit provided with the offset current and configured to output the offset voltage;
a first tracker connected to an output terminal of the first regulator and configured to track the first output signal;
a second tracker connected to an output terminal of the second regulator and configured to track the second output signal;
a third tracker connected to an output terminal of the third regulator and configured to track the third output signal; and
a discharging unit connected to a common output node of the first tracker, the second tracker, and the third tracker and configured to discharge a current along a voltage direction of the selection signal.
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