A system and method for providing interleaving point-of-load (POL)
regulators such that each regulator's switching cycle is phase displaced
with respect to those of other POL regulators in the array is disclosed.
As a result, the aggregate input and/or output reflected ripple and noise
of the input, output, or both is reduced. Each regulator in the array is
associated with an unique address. A serial data-line writes the phase
spacing programmed to each addressable POL regulator in the array. The
present invention permits phase displacement of POL regulators without
limitation to the input and output voltages of each of the regulators in
the array. The array of POL regulators may also operate in a phase
displaced mode with only a single control line. The need for separate
controllers and multiple control lines is thereby eliminated.