公开(公告)号：US20240036595A1

公开(公告)日：2024-02-01

申请号：US18224897

申请日：2023-07-21

Applicant: STMicroelectronics S.r.l.

Inventor： Umberto FERLITO ,  Michele VAIANA ,  Giuseppe BRUNO ,  Alfio Dario GRASSO

IPC: G05F1/565 ,  G05F1/575

CPC classification number: G05F1/565 ,  G05F1/575

Abstract: A low-drop out voltage regulator includes a pass element arranged between an input terminal and an output terminal, a feedback network configured to produce a feedback voltage derived from an output voltage, and an error amplifier configured to drive the pass element as a function of a difference between the feedback voltage and a reference voltage. An output transistor coupled in series with the pass element is controlled by a mode selection circuit. In response to assertion of a mode selection signal, the mode selection circuit turns on the output transistor to sink a current with a controlled magnitude from the output node. In response to de-assertion of the mode selection signal, the mode selection circuit sinks a current with a controlled magnitude from a control terminal of the output transistor to turn off the output transistor at a controlled rate.