Low dropout linear regulators and starting methods therefor
US9977443B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 24, 2017 |
| Grant date | May 22, 2018 |
| Priority date | — |
| Expiry date | Aug 24, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F1/575
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A low dropout linear regulator, a starting method, an electronic device, and a chip are provided. Wherein the low dropout linear regulator comprises an error amplifier circuit, an over current circuit and an over-current adjustor, the starting method includes: beginning a soft-starting process of the low dropout linear regulator and turning on a first transistor and a second transistor to provide a over current to raise an output voltage of the low dropout linear regulator; maintaining the ‘turn on’ state of the first transistor and the second transistor and decreasing the over current according to a signal obtained from the error amplifier circuit after the output voltage of the low dropout linear regulator reaches a starting voltage of the error amplifier circuit; wherein the error amplifier circuit begins to operate when the output voltage of the low dropout linear regulator reaches the starting voltage of the error amplifier circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.