公开(公告)号：US20250132596A1

公开(公告)日：2025-04-24

申请号：US18382776

申请日：2023-10-23

Applicant: STMicroelectronics International N.V.

Inventor： Domenico RAGONESE ,  Marco MINIERI ,  Maurizio GRECO ,  Vincenzo MARANO ,  Vojtech ELIAS ,  Milos HOFMAN

IPC: H02J7/34 ,  H02J7/00

Abstract: A power-management system includes a power transistor coupled between a power supply and load, a driver circuit driving the power transistor in response to an input signal, and an error amplifier generating a control signal that modifies operation of the driver circuit based on a comparison between a selected reference voltage and a drain-to-source voltage of the power transistor. A multiplexer provides the selected reference voltage to the error amplifier and passes one of a plurality of different reference voltages as the selected reference voltage based upon first and second selection signals. A first selection circuit charges a first capacitor in response to the input signal and generates the first selection signal based on a first voltage across the first capacitor. A second selection circuit charges a second capacitor in response to the input signal and generates the second selection signal based on a second voltage across the second capacitor.