公开(公告)号：US20240097672A1

公开(公告)日：2024-03-21

申请号：US17949454

申请日：2022-09-21

Applicant: Apple Inc.

Inventor： Yueming He ,  Dennis M. Fischette, JR.

IPC: H03K17/16 ,  H03K19/003

CPC classification number: H03K17/167 ,  H03K19/00361

Abstract: An integrated circuit may be provided with power switching circuitry. The power switching circuitry may include a primary power switch and multiple auxiliary power switches. A power gating control circuit may output control signals for selectively activating the primary power switch and at least one of the auxiliary power switches to charge a gated voltage. One or more voltage detectors may be configured to monitor the gated voltage and to activate the remaining auxiliary power switches in response to detecting that the gated voltage exceeds one or more thresholds. Configured and operated in this way, inrush current surge protection can be achieved while charging up the gated voltage sufficiently fast.

公开(公告)号：US12206397B2

公开(公告)日：2025-01-21

申请号：US17949454

申请日：2022-09-21

Applicant: Apple Inc.

Inventor： Yueming He ,  Dennis M Fischette, Jr.

IPC: H03K17/16 ,  H03K19/003

Abstract: An integrated circuit may be provided with power switching circuitry. The power switching circuitry may include a primary power switch and multiple auxiliary power switches. A power gating control circuit may output control signals for selectively activating the primary power switch and at least one of the auxiliary power switches to charge a gated voltage. One or more voltage detectors may be configured to monitor the gated voltage and to activate the remaining auxiliary power switches in response to detecting that the gated voltage exceeds one or more thresholds. Configured and operated in this way, inrush current surge protection can be achieved while charging up the gated voltage sufficiently fast.