公开(公告)号：US20250021121A1

公开(公告)日：2025-01-16

申请号：US18349792

申请日：2023-07-10

Applicant: Apple Inc.

Inventor： Adrien Vargas ,  Jerome Casters ,  Guillaume Gourlat ,  Timo W. Gossmann ,  Mina Mofreh Gad Elsayed Abdallah

IPC: G05F1/575 ,  H03K17/687 ,  H03K19/173 ,  H04B1/40

Abstract: Voltage regulator circuitry is provided that includes a pass transistor, an error amplifier for regulating the pass transistor, a high rail switch coupled between a first power supply line and the pass transistor, a big low rail switch coupled between a second power supply line and the pass transistor, a small low rail switch coupled between the second power supply line and the pass transistor, and a comparator for monitor a current flowing through or a voltage across the small low rail switch. The small low rail switch, the comparator, and a gating logic can be coupled in an analog feedback loop. The voltage regulator circuitry can include a sequencer for controlling the high rail switch, the big low rail switch, and the gating logic to perform fast seamless transitions between a low voltage rail mode and a high voltage rail mode without incurring large current glitches.