公开(公告)号：US09772637B2

公开(公告)日：2017-09-26

申请号：US13912821

申请日：2013-06-07

Applicant: MediaTek Inc.

Inventor： Chien-Wei Kuan ,  Jyh-Pyng Lay ,  Chih-Ching Yu ,  Yuh-Long Yeh

IPC: G05F1/46

CPC classification number: G05F1/46

Abstract: A voltage regulation circuit is provided. The voltage regulation circuit regulates a level of a supply voltage provided by an automotive battery. The voltage regulation circuit includes a selector and an error amplifier. The selector receives a plurality of predetermined voltages and selects one of the plurality of predetermined voltages according to a control signal to serve as a first reference voltage. The error amplifier generates an error signal according to the first reference voltage and a feedback signal. The feedback signal is related to the supply voltage. The voltage regulation circuit regulates the level of the supply voltage according to the error signal.