公开(公告)号：US20230333583A1

公开(公告)日：2023-10-19

申请号：US18295774

申请日：2023-04-04

Applicant: STMICROELECTRONICS S.r.l.

Inventor： Antonino CONTE ,  Marco RUTA ,  Francesco TOMAIUOLO ,  Michelangelo PISASALE ,  Marion Helne GRIMAL

IPC: G05F1/59 ,  G05F1/575

CPC classification number: G05F1/59 ,  G05F1/575

Abstract: A LDO regulator circuit comprises an input comparator and driver circuitry including transistors having a current flow path therethrough coupled to an output node of the regulator. First and second driver each comprises: driver transistors having the current flow paths therethrough coupled to the output node, capacitive boost circuitry that applies to the drive transistors a voltage-pumped replica of the comparison signal. Voltage refresh transistor circuitry coupled to the capacitive boost circuitry transfer thereon the voltage-pumped replica. The first and second drivers can be controllably switched between a first mode of operation, during which the current flow path through the driver transistors is conductive or non-conductive based on the voltage-pumped replica of the comparison signal, and a second mode, during which the voltage refresh transistor circuitry is activated to transfer the voltage-pumped replica of the comparison signal, and the current flow path through the driver transistors is non-conductive.