Leakage reduction technique for low voltage LDOs
US9671804B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 19, 2014 |
| Grant date | Jun 6, 2017 |
| Priority date | — |
| Expiry date | Feb 8, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F1/569
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
The present document relates to multi-stage amplifiers, such as linear regulators (e.g. low-dropout regulators). A method and a circuit for reducing leakage current of such multi-stage amplifiers is presented. A voltage regulator is described. The voltage regulator comprises a pass device configured to provide a load current at a regulated output voltage to an output node of the voltage regulator. A source of the pass device is coupled to a first potential of the voltage regulator. Furthermore, the voltage regulator comprises drive circuitry configured to control the pass device via a gate of the pass device, based on a reference voltage and based on a feedback voltage derived from the output voltage. In addition, the voltage regulator comprises leakage reduction circuitry configured to pull-up the gate of the pass device using a second potential; wherein the second potential is higher than the first potential.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.