公开(公告)号：US20240248504A1

公开(公告)日：2024-07-25

申请号：US18099752

申请日：2023-01-20

Applicant: Apple Inc.

Inventor： Adrien F. Vargas ,  Timo W. Gossmann ,  Sebastian Reinhold

IPC: G05F1/59 ,  H04B1/40

CPC classification number: G05F1/59 ,  H04B1/40

Abstract: This disclosure is directed to a hybrid low dropout voltage regulator circuit, hereinafter referred to as the LDO, including a flipped voltage follower (FVF), coarse grain voltage adjustment circuitry, and fine grain voltage adjustment circuitry. The LDO may provide an output voltage based on receiving a reference voltage. The flipped voltage follower may supply the output voltage to one or more other electronic circuits. The coarse grain voltage adjustment circuitry and the fine grain voltage adjustment circuitry may adjust the output voltage based on a desired voltage level. The LDO may use feedback signals, feedforward signals, or both to provide the output voltage.

公开(公告)号：US20240028059A1

公开(公告)日：2024-01-25

申请号：US17872989

申请日：2022-07-25

Applicant: Apple Inc.

Inventor： Antonio Passamani ,  Timo W. Gossmann ,  Adrien F. Vargas ,  Guillaume Gourlat

IPC: G05F1/46 ,  G05F1/56 ,  G05F1/575 ,  H03M1/66 ,  H03F3/45

CPC classification number: G05F1/468 ,  G05F1/561 ,  G05F1/575 ,  H03M1/66 ,  H03F3/45071

Abstract: The present disclosure relates to power management for digital-to-analog converters (DACs). As electronic devices and the components therein become increasingly smaller to satisfy the desire for more compact/portable devices, the operating voltage may be reduced to reduce the likelihood of shorts and/or voltage/current bleeds. To maintain comparable power output with the reduced operating voltage, the current may increase proportionally to the decrease in voltage. Consequently, in scaled devices and applications, high-current low-voltage regulators may be beneficial. As such, a low-dropout regulator (LDO) including one or more operational amplifiers and multiple pass devices may be implemented between a power supply and the DAC to regulate the power supply to the DAC. Moreover, the LDO may include one or more feedback loops to maintain a desired voltage regulation of the pass devices.