High-speed LDO driver circuit using adaptive impedance control
US9086714B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 22, 2012 |
| Grant date | Jul 21, 2015 |
| Priority date | — |
| Expiry date | Nov 9, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/30
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
The present document relates to linear regulators or linear voltage regulators configured to provide a constant output voltage. In particular, the present document relates to driver circuits of low-dropout (LDO) regulators. A driver circuit (300) for driving a pass device (201) of a linear regulator (120) is described. The driver circuit (300) comprises a driver stage (110) adapted to regulate a driver gate (220) for connecting to the gate of the pass device (201); wherein the driver stage (110) comprises a transistor diode (210) having the driver gate (220); and a feedback transistor (305) having a source and a drain coupled to a source and drain of the transistor diode (210); wherein a feedback voltage at the gate of the feedback transistor (305) is regulated based on the output current of the pass device (201).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.