Invention Grant
- Patent Title: Split pass device applications for DAC supply systems
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Application No.: US17872993Application Date: 2022-07-25
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Publication No.: US12184294B2Publication Date: 2024-12-31
- Inventor: Antonio Passamani , Timo W Gossmann , Adrien F Vargas , Guillaume Gourlat
- Applicant: Apple Inc.
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: FLETCHER YODER PC
- Main IPC: H03M1/00
- IPC: H03M1/00 ; G05F1/575 ; H03F3/20 ; H03F3/45 ; H03G3/20 ; H03M1/66

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.
Public/Granted literature
- US20240028060A1 SPLIT PASS DEVICE APPLICATIONS FOR DAC SUPPLY SYSTEMS Public/Granted day:2024-01-25
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