公开(公告)号：US20220100218A1

公开(公告)日：2022-03-31

申请号：US17315621

申请日：2021-05-10

Applicant: Samsung Electronics Co., Ltd.

Inventor： DONGHOON JUNG ,  TAE-HWANG KONG ,  SANGHO KIM ,  JUNHYEOK YANG ,  Jeongpyo PARK

IPC: G05F1/575 ,  H02M3/07

Abstract: Disclosed is an electronic device, which includes an amplifier circuit that receives a feedback voltage and a reference voltage and amplifies a difference between the feedback voltage and the reference voltage to output an amplified difference voltage, an analog-to-digital converter that converts the amplified difference voltage to a digital code including two or more bits, and low-dropout (LDO) regulators that outputs output voltages based on the digital code. Each of the LDO regulators includes power transistors outputting a corresponding output voltage of the output voltages, drives one of the power transistors in a switching state, and drives each of remaining power transistors in a turned-on state or a turned-off state.