Switched mode voltage regulator and method of operation
US8552700B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 6, 2010 |
| Grant date | Oct 8, 2013 |
| Priority date | — |
| Expiry date | Dec 3, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/36
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A voltage regulator includes a transistor, a comparator, and a compensation circuit. The comparator has a first input terminal coupled to receive a clock signal, a second input terminal, and an output terminal coupled to a control electrode of the transistor. The compensation circuit has a first input terminal coupled to receive a reference voltage, a second input terminal coupled to the output terminal of the voltage regulator, and an output terminal coupled to the second input terminal of the comparator. The compensation circuit has a filter circuit. The filter circuit has a first RC time constant during startup of the voltage regulator, and the filter circuit has a second RC time constant during normal operation. Changing the RC time constant for startup prevents an overshoot of an output voltage of the voltage regulator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.