公开(公告)号：US20210365059A1

公开(公告)日：2021-11-25

申请号：US17393658

申请日：2021-08-04

Applicant: STMicroelectronics SA

Inventor： Lionel VOGT ,  Eoin Padraig O HANNAIDH

IPC: G05F1/575 ,  G05F1/565

Abstract: A low-dropout regulator includes a power stage having an output terminal coupled to a load circuit operable in different operating modes in which it receives different output currents. An error amplifier has a first input coupled to a reference voltage and an output coupled to an input terminal of the power stage. A compensation circuit includes a first stage with an RC filter coupled to the input terminal of the power stage, and generating an initial compensation voltage. A second stage includes a first transistor coupled between a supply voltage and a second node, and controlled by a complementary control signal, a high-side capacitor coupled between the second node and ground, and a third transistor coupled between the initial compensation voltage and the second node, and controlled by a control signal representative of the current operating mode of the load circuit.

公开(公告)号：US20190384338A1

公开(公告)日：2019-12-19

申请号：US16438206

申请日：2019-06-11

Applicant: STMicroelectronics SA

Inventor： Lionel VOGT ,  Eoin Padraig O HANNAIDH

IPC: G05F1/575 ,  G05F1/565

Abstract: A low-dropout voltage regulation device includes a power stage having an output terminal coupled to a load circuit, the load circuit being operable in a plurality of operating modes. The load circuit is configured to receive a different respective output current when in each of the plurality of operating modes. An error amplifier has an output coupled to an input terminal of the power stage. A compensation circuit is coupled to the input terminal of the power stage and is operable in a plurality of selectable configurations that are respectively tailored to the plurality of operating modes. The plurality of selectable configurations are selectable in response to a control signal representative of a current operating mode of the load circuit.