Patent ID: 8373396
Filing Date: 2013-02-12
Classification: G05F,H02M

Abstract:
1. An adaptive two-stage voltage regulator, comprising: a voltage regulator for converting an input voltage (Vin) to a middle voltage (Vm), wherein the input voltage is smaller than or equal to a maximum value (Vin_max), Vin≦Vin_max; a linear regulator for converting the middle voltage to an output voltage (Vout); and a middle voltage controller for adjusting the middle voltage according to (1) an input voltage indicator and one of (2a) an output voltage indicator and wherein the input voltage indicator and the output voltage indicator or the predetermined first reference signal determines a second reference signal which is supplied to the voltage regulator, such that when Vin≦Vout, Vm=Vout+ΔV and (Vout+ΔV)<Vin_max.