Anti-latch circuit for low dropout dual supply voltage regulator

Details Anti-latch circuit for low dropout dual supply voltage regulator Anti-latch circuit for low dropout dual supply voltage regulator

1997-08-07

1998-07-14

Nguyen, Matthew V.

Electricity: power supply or regulation systems

Input level responsive

323284, 323311, G05F 500

Patent

active

057810028

ABSTRACT:
Efficient very low dropout (i.e., approximately equal to about V.sub.CESAT of the output transistor) dual supply voltage regulator circuits and methods are provided. The voltage regulators are capable of providing very low dropout irrespective of supply sequencing. Traditional supply sequencing problems are overcome by including an anti-latch circuit that monitors the output power supply during power-on. The anti-latch circuit is also coupled to any location in the regulator circuit where the drive current can be inhibited whenever the output power monitor senses that the output power supply is not fully operational. The anti-latch circuit operates to prevent drive current from being supplied to the output transistor unless output power is available so that the substrate of the regulator is not permitted to become forward biased (and thus prevents the establishment of an undesired latch condition).

REFERENCES:
patent: 3754182 (1973-08-01), Morris et al.
patent: 4709320 (1987-11-01), Konopka
patent: 4755741 (1988-07-01), Nelson
patent: 4792747 (1988-12-01), Schroeder
patent: 5280233 (1994-01-01), Poletto et al.
"Initial Release: LT1580/LT1580-2.5; 7A, Very Low Dropout Regulator," Linear Technology, Inc., Milpitas, California, pp. 1 to 4, published Jun. 1995.

Affiliated with

Also associated with

Rating

Anti-latch circuit for low dropout dual supply voltage 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 Anti-latch circuit for low dropout dual supply voltage regulator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Anti-latch circuit for low dropout dual supply voltage regulator will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1885531