公开(公告)号：US20220397923A1

公开(公告)日：2022-12-15

申请号：US17836524

申请日：2022-06-09

Applicant: STMicroelectronics S.r.l. ,  STMicroelectronics (Rousset) SAS

Inventor： Daniele MANGANO ,  Andrei TUDOSE ,  Francesco CLERICI ,  Pasquale BUTTA'

IPC: G05F1/46 ,  G06F1/3296

Abstract: A voltage regulator is embedded in a circuit intermediate a first node (coupled to a battery) and a second node (supplying power to an external memory). The voltage regulator is activatable in a first mode of operation for startup during which an voltage is applied to the second node that increases towards a supply threshold. In response to the voltage at the second node reaching the supply threshold, the voltage regulator transitions to a second mode of operation where a programmable regulated voltage (higher than the supply threshold) is applied to the second node. In response to receipt of a low-power operation request, a first high-drive regulator circuitry is deactivated and a second low-power regulator circuitry is activated to provide a third mode of operation at low power.

公开(公告)号：US20220397924A1

公开(公告)日：2022-12-15

申请号：US17836417

申请日：2022-06-09

Applicant: STMicroelectronics S.r.l.

Inventor： Daniele MANGANO ,  Francesco CLERICI ,  Pasquale BUTTA'

IPC: G05F1/56 ,  G05F1/46

Abstract: A voltage regulator coupled between a first node and second node includes a first (full-power) regulator circuit and a second (low-power) regulator circuit. In a first mode: the first regulator circuit is activated (with the second regulator circuit inactive) when the voltage at the first node is a battery voltage, and the voltage regulator is kept de-activated when the voltage at the first node is a ground voltage. In a second mode: the first regulator circuitry in is active (with the second regulator circuitry inactive) when the voltage at the first node is a battery voltage, and the voltage regulator is inactive when the voltage at the first node is a ground voltage. In a third mode: the second regulator circuitry is active (with the first regulator circuitry inactive) irrespective of the voltage at the first node being at the battery voltage or the ground voltage.