Low-power low-dropout voltage regulators with high power supply rejection and fast settling performance
US9753474B2 · kind B2 · utility
4Cited by
4References
20Claims
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Key dates
| Filing date | Feb 5, 2014 |
| Grant date | Sep 5, 2017 |
| Priority date | — |
| Expiry date | Apr 19, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F1/56
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A low-power low-dropout (LDO) voltage regulator device includes an error amplifier, a level-shifter circuit, and an NMOS pass transistor. The error amplifier compares a sampled portion of a regulated output voltage of the LDO voltage regulator with a reference voltage and generates an error signal. The level-shifter circuit is coupled to the error amplifier. The NMOS pass transistor provides the regulated output voltage with low dropout operation. The level-shifter circuit can shift a voltage level of the error signal to facilitate the low dropout operation of the NMOS pass transistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.