公开(公告)号：US20170337886A1

公开(公告)日：2017-11-23

申请号：US15159777

申请日：2016-05-19

Applicant: NOVATEK MICROELECTRONICS CORP.

Inventor： Ren-Hong LUO ,  Shih-Chun LIN ,  Yung-Cheng LIN ,  Mu-Jung CHEN

IPC: G09G3/36 ,  H02M1/08 ,  H02M3/158

CPC classification number: G09G3/36 ,  G09G3/3611 ,  G09G2330/021 ,  G09G2370/08 ,  H02M1/088 ,  H02M2001/0045

Abstract: A voltage regulator and method applied thereto are provided. The voltage regulator generates a regulated voltage in response to a reference voltage and a control code. The voltage regulator includes a voltage divider circuit, an amplifier circuit, and a power MOS array. The voltage divider circuit is configured to divide the regulated voltage to generate a feedback voltage. The amplifier circuit is configured to amplify a voltage difference between the reference voltage and the feedback voltage to generate a bias voltage. The power MOS array includes multiple transistors. Each transistor has a first terminal coupled to a power rail, a second terminal coupled to the regulated voltage, and a control terminal selectively coupled to either the power rail or the bias voltage in response to the control code.