Capacitor free low drop out regulator

Details Capacitor free low drop out regulator Capacitor free low drop out regulator

2007-12-25

2007-12-25

Vu, Bao Q. (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

C323S281000, C323S273000, C323S316000, C323S226000, C323S277000, C330S253000, C330S255000, C330S259000, C330S261000

Reexamination Certificate

active

11467520

ABSTRACT:
A low drop out (LDO) regulator that includes a novel error amplifier, which is arranged with a first stage that employs both NMOS and PMOS devices that are similarly doped in differential pairs and a second stage that operates with NMOS and PMOS devices in a push-pull arrangement. In addition to the error amplifier, the LDO regulator can also include a startup circuit coupled to an enable voltage, a reference filter circuit coupled to a reference voltage, an output circuit, a quiescent current control circuit, and a pulse generator circuit. Also, an internal RC network is provided to compensate for phase shift. The integrated operation of the components of the regulator enables stable and fast operation of an LDO regulator with no external capacitors connected to the input or output terminals.

REFERENCES:
patent: 5939870 (1999-08-01), Nguyen et al.
patent: 6005440 (1999-12-01), Okamoto
patent: 6603294 (2003-08-01), Morita
patent: 6661210 (2003-12-01), Kimball et al.
patent: 7106136 (2006-09-01), Moon et al.
patent: 2005/0017809 (2005-01-01), Ueno
patent: 2007/0040536 (2007-02-01), Smith et al.
Hazucha et al.: “Area-Efficient Linear Regulator With Ultra-Fast Load Regulation,” IEEE Journal of Solid-State Circuits, vol. 40, No. 4, Apr. 2005, pp. 933-940.
Leung et al.: “A Capacitor-Free CMOS Low-Dropout Regulator with Damping-Factor-Control Frequency Compensation,” IEEE Journal of Solid-State Circuits, vol. 38, No. 10, Oct. 2003, pp. 1691-1702.
TPS732xx Datasheet: Cap-Free, NMOS, 250mA Low Dropout Regulator with Reverse Current Protection, Texas Instruments Incorporated, 27 pages, Revised May 2007, Dallas, Texas.

Affiliated with

Also associated with

Rating

Capacitor free low drop out regulator does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Capacitor free low drop out regulator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Capacitor free low drop out regulator will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3837448