Several techniques are provided to increase the efficiency and reduce the EMI of produced by a multiphase switching voltage regulator. According to one technique, a multiphase switching voltage regulator is controlled by varying in time the duration and/or position of each switching pulse for each of a plurality of channels of the switching voltage regulator in response to one or more signals representing a state of each of a plurality of channels of the voltage regulator. According to a second technique, a method is provided for controlling a multiphase switching voltage regulator comprising operating each channel of the voltage regulator at a different frequency. The timing of the switching pulses to each channel is scheduled to avoid time-overlap of switching pulses for two or more channels.