Patent ID: 7688607

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 control signal; a plurality of slaves each of which having an intermediate terminal, a switching circuit to select a conduction state, and an internal controller to control the switching circuit based on the control signal; and a filter operable to provide a generally DC output voltage at the output terminal, the filter including a plurality of inductors, each inductor of the plurality of inductors having an input end connected to an intermediate terminal of a corresponding slave and an output end connected to the output terminal, the plurality of inductors including a first inductor bank having a first predetermined number of inductors wound around a first core and a second inductor bank having a second predetermined number of inductors wound around a second core, the first predetermined number being different than the second predetermined number.