An output regulator comprises M switch arrays, where M is an integer greater than 2. A controller selectively enables N of the M switch arrays in response to a sense signal. The sense signal is based on an output of the output regulator. The controller generates drive signals to control the N of the M switch arrays, where N is an integer greater than or equal to 0 and less than or equal to M. When N is greater than 0, the controller dynamically sets a phase interval between the N of the M switch arrays to one of greater than 360/N or less than 360/N.