公开(公告)号：US20240045458A1

公开(公告)日：2024-02-08

申请号：US18356818

申请日：2023-07-21

Applicant: STMicroelectronics International N.V.

Inventor： Zubair KHAN ,  Sandeep KAUSHIK

IPC: G05F1/575 ,  G05F1/46

CPC classification number: G05F1/575 ,  G05F1/468

Abstract: Provided are techniques for detecting a short circuit fault at an output of a regulator and protecting the regulator from the short circuit fault. An error amplifier receives a reference voltage and a feedback voltage and compares comparing the reference voltage with the feedback voltage for driving a power transistor of the regulator. A modification stage compares an output voltage of the voltage regulator with a fault reference voltage and in response to determining that the output voltage of the voltage regulator is less than the fault reference voltage, drives the power transistor using an internal node of the error amplifier by changing states of a first switch and a second switch and supplies the reference voltage to both the first and second inputs of the error amplifier by changing states of a third switch and a fourth switch.