Low dropout linear voltage regulator with an active resistance for frequency compensation to improve stability
US7710091B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 27, 2007 |
| Grant date | May 4, 2010 |
| Priority date | — |
| Expiry date | May 12, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F1/575
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
The present invention discloses an LDO (Low DropOut) linear voltage regulator, which is based on an NMC (Nested Miller Compensation) architecture and can be capacitor-free, wherein an active resistor is added to the feedback path of the Miller compensation capacitor to increase the controllability of the damping factor, solve the problem of extensively using the output capacitor with a parasitic resistance, and solve the problem that a compromise must be made between the damping factor control and the system loop gain. Further, the present invention utilizes a capacitor-sharing technique to reduce the Miller capacitance required by the entire system and accelerate the stabilization of output voltage without influencing stability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.