Patent ID: 9350244
Filing Date: 2016-05-24
CPC Classification: H02M,Y02B

Claim Text:
1. A switching regulator, comprising: a multiphase buck converter comprising a plurality of main phases configured to covert a power supply voltage to a lower voltage for application to an electronic device at different load conditions; and an auxiliary phase configured to operate in a pulse frequency modulation mode during a light load condition so that power is supplied to the electronic device by at least the auxiliary phase during the light load condition, wherein the auxiliary phase and the plurality of main phases of the multiphase buck converter each comprise field effect transistors, wherein the field effect transistors of the auxiliary phase are lower voltage transistors which occupy smaller physical area than the field effect transistors of the main phases, wherein the auxiliary phase and each of the plurality of main phases of the multiphase buck converter has an output coupled to an inductor, wherein the inductor coupled to the output of the auxiliary phase occupies less physical area and has a lower saturation current than the inductors coupled to the outputs of the main phases.