Title:
LINEAR REGULATORS WITH LOW DROPOUT AND HIGH LINE REGULATION
Document Type and Number:
WIPO Patent Application WO2002013362
Kind Code:
A3
Abstract:
Apparatus and method to provide high line regulation, which can be combined with a low dropout voltage, for linear regulators. The control for the regulators is referenced to ground rather than a relatively noisy power supply terminal so that the control is substantially free of power supply noise. The pass transistor forms the second transistor of a current mirror mirroring the current from the control. Referencing the control to ground and mirroring the control current to the pass transistor makes the output of the regulator substantially independent of the power supply noise. Various embodiments are disclosed.
Inventors:
EDWARDS CHRISTOPHER F (GB)
MANEY J WILLIAM (US)
MANEY J WILLIAM (US)
Application Number:
PCT/US2001/024508
Publication Date:
August 01, 2002
Filing Date:
August 03, 2001
Export Citation:
Assignee:
MAXIM INTEGRATED PRODUCTS (US)
EDWARDS CHRISTOPHER F (GB)
MANEY J WILLIAM (US)
EDWARDS CHRISTOPHER F (GB)
MANEY J WILLIAM (US)
International Classes:
G05F1/575; G05F3/26; (IPC1-7): G05F1/575
Foreign References:
| US5929616A | 1999-07-27 | |||
| US6046577A | 2000-04-04 | |||
| EP0957421A2 | 1999-11-17 | |||
| US5867015A | 1999-02-02 |
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