Patent ID: 7535122

Claim:
An apparatus, comprising: a multiple input-voltage level voltage-regulator (VR) to dynamically reconfigure selection between the multiple input-voltages to control operating characteristics of the VR selected from the group consisting of 1) power conversion efficiency based on load demand on the VR, or 2) response rate to a transient deviation from a regulated output parameter of the VR based on either measured load or receipt of a signal indicating an anticipated load change, wherein the VR having a first stage to receive a first input-voltage level, where the first stage at that first input-voltage level is designed to operate above a first power conversion efficiency level for a first power level outputted from the VR, and a second stage to receive a second input voltage level, wherein the second stage at that second input voltage level is designed to operate above a second power conversion efficiency level for a second power level outputted from the VR, where the first power level is different than the second power level; and a system controller to select between the multiple input voltages and to control a switching frequency of the VR to maintain substantially flat-line power conversion efficiency from light load to full load conditions in the VR.