Low dropout linear regulator with internally compensated effective series resistance
US10338614B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 24, 2018 |
| Grant date | Jul 2, 2019 |
| Priority date | — |
| Expiry date | Apr 24, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H11/1204
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A voltage regulator circuit having an internally compensated effective series resistance includes a control circuit to generate an out current at a regulated output voltage based on a reference voltage. The control circuit includes an amplifier, a resistive element to feedback output voltage to an input of the amplifier, and a compensation circuit to couple the internally compensated effective series resistance into the control circuit. The compensation circuit includes a first current sense device to generate a first sensed current proportional to a current through an N-type pass device, a second current sense device arranged to generate a second sensed current proportional to the current through the N-type pass device, and a bias circuit coupled to sink the first sensed current and the second sensed current to reduce a bias voltage across the resistive element below a threshold voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.