公开(公告)号：US20210021270A1

公开(公告)日：2021-01-21

申请号：US16320129

申请日：2017-10-16

Applicant: SOUTHERN UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA

Inventor： Chenchang Zhan ,  Yongxiong Ji ,  Guigang Cai ,  Shuangxing Zhao

IPC: H03L5/02

Abstract: A low dropout linear voltage regulator is provided. In the low dropout linear voltage regulator, a power transistor has a source connected to a power source, a gate connected to an output terminal of an error amplifier, a drain connected to an output terminal of the low dropout linear voltage regulator. A dynamic Miller compensation network has a first terminal connected to the output terminal of the error amplifier, a second terminal connected to the output terminal of the low dropout linear voltage regulator. A controller has a first terminal connected to the gate of the power transistor, and a second terminal connected to a third terminal of the Miller compensation network. The controller is configured to detect a current at the output terminal of the low dropout linear voltage regulator and generate control signals according to the current to control connection and disconnection of each second resistance-capacitance branch in the dynamic Miller compensation network.