Low electrical consumption voltage regulator
US6501253B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 4, 2001 |
| Grant date | Dec 31, 2002 |
| Priority date | — |
| Expiry date | Jun 27, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F1/575
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A voltage regulator includes a regulation MOS transistor and an amplifier providing an output for driving a gate of the regulation MOS transistor. The amplifier drives the gate based upon a difference between a reference voltage and a feedback voltage. The voltage regulator may further include a circuit for making the amplifier switch to a standby mode with low current consumption when the difference between the supply voltage and the output voltage of the regulator is below a first threshold. This is done while maintaining, at the gate of the regulation transistor, a voltage that keeps the regulation transistor on. The present invention is particularly applicable to the management of power supplies in portable telephones.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.