VOLTAGE REGULATOR, CONTROL CIRCUIT FOR VOLTAGE REGULATOR, AND CONTROL METHOD FOR VOLTAGE REGULATOR

摘要

A voltage regulator (100), and a control circuit and a control method for the voltage regulator (100). The voltage regulator (100) comprises an amplifier (120), a charge pump circuit (242), a first transistor (M1), and a regulated voltage output end (NR). A first input end (NI1) and a second input end (NI2) of the amplifier (120) are respectively coupled to a first reference voltage (VR1) and a feedback voltage (VFB). An amplifier output end (NT) of the amplifier (120) is used for outputting an amplified voltage (OPV).The charge pump circuit (242) comprises a first charge pump (243) and a second charge pump (244) coupled in parallel between a voltage input end (NVI) and a voltage output end (NVO). The first charge pump (243) and the second charge pump (244) are used for alternately converting the amplified voltage (OPV) to output a driving voltage (VD) from the voltage output end (NVO). A control end (TC1) of the first transistor (M1) receives the driving voltage (VD) by means of the voltage output end (NVO). The regulated voltage output end (VR) is coupled to a first connection end (T11) of the first transistor (M1), and is used for outputting an output voltage (VOUT). The voltage regulator (100) can improve the stability of the output voltage (VOUT) and has the effect of low power consumption.