公开(公告)号：US20230059963A1

公开(公告)日：2023-02-23

申请号：US17891363

申请日：2022-08-19

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Kyeseok YOON ,  Hyebong KO ,  Jinwoo SO ,  Hyoungseok OH ,  Daewoong CHO ,  Jungwook HEO

IPC: H02M3/158 ,  H02M3/07

Abstract: A buck converter including: a first switching element connecting an input voltage node to a switching node; a second switching element connecting the switching node to a ground node; a low drop out (LDO) voltage regulator connected to the input voltage node; a pulse width modulation (PWM) controller configured to receive a mode signal indicating an operation mode and toggle, in response to the mode signal, a first control signal for turning on the first switching element or a second control signal for turning on the second switching element; a bootstrap charger configured to receive the mode signal and toggle, in response to the mode signal, a third control signal for turning on the second switching element; and a bootstrap capacitor connecting an output node of the LDO voltage regulator to the switching node.