公开(公告)号：US20240413742A1

公开(公告)日：2024-12-12

申请号：US18332183

申请日：2023-06-09

Applicant: STMicroelectronics International N.V.

Inventor： Mayankkumar HARESHBHAI NIRANJANI ,  Rik PAUL ,  Rajesh NARWAL

IPC: H02M1/36 ,  H02M1/44 ,  H02M3/155 ,  H02M7/217

Abstract: An example power management unit utilizing an example circuit to disable a voltage regulator is provided. The example circuit includes a voltage selection circuit and a power-down switching device. The voltage selection circuit configured to receive a first voltage source and a second voltage source to output a selected voltage based on the higher of the two input voltages. The voltage selection circuit utilizes a first transistor electrically connected in parallel with a second transistor between the first voltage source and the second voltage source to generate the selected voltage. The second transistor gate voltage at the second transistor gate is generated based at least in part on a voltage at the first transistor drain. The selected voltage is generated based on a voltage at the second transistor drain. The power-down switching device is configured to generate a voltage for a voltage regulator based on the selected voltage.