Voltage regulator
US7646574B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 16, 2008 |
| Grant date | Jan 12, 2010 |
| Priority date | — |
| Expiry date | Aug 19, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F1/575
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Provided is a voltage regulator having an overcurrent protective circuit, which is excellent in detection precision and small in current consumption. The voltage regulator having the overcurrent protective circuit which detects that overcurrent flows in an output transistor, and limits the current of the output transistor, includes a regulated cascode circuit that makes a voltage at a source of the output transistor equal to a voltage at a source of the output current detection transistor, in which the operating current of the regulated cascode circuit is supplied by a transistor that is controlled by the output voltage of an error amplifier circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.