Control circuit for low dropout regulator
US5274323A · kind A · utility
28Cited by
11References
42Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 31, 1991 |
| Grant date | Dec 28, 1993 |
| Priority date | — |
| Expiry date | Oct 31, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F1/56
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A three terminal control circuit for a low dropout voltage regulator having a PNP pass transistor is provided. The control circuit is capable of pulling the base drive point down to a voltage of 3.0 volts or less to permit a current limiting resistor to be inserted between the base drive point and the base of the PNP pass transistor. The control circuit includes a pair of small-valued capacitors for providing stable operation with different output capacitors. The control circuit can also be used with p-channel FET pass transistors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.