Patent ID: 7522436

Claim:
A voltage regulator having an input terminal coupled to an input voltage source and an output terminal coupled to a load, comprising: a master controller which detects an output voltage at the output terminal and generates a current control signal; a plurality of slaves, each slave having an intermediate terminal and receiving the current control signal from the master controller, each slave including: a switching circuit to alternate between a first state in which the intermediate terminal is connected to an input terminal and a second state in which the intermediate terminal is connected to a ground; an internal controller configured to: determine a first threshold based on the current control signal and a first offset; receive a first measurement of an output current at the intermediate terminal; control the switching circuit to switch from one of the first state and the second state to another of the first state and the second state when the output current equals or exceeds the first threshold; determine a second threshold based on the current control signal and a second offset; adjust the first offset or the second offset based on a comparison of the first measurement of the output current to the second threshold; and a filter between the intermediate terminals and the output terminal to provide a generally DC output voltage at the output terminal.