Soft-stop circuit and method for a voltage regulator

Details Soft-stop circuit and method for a voltage regulator Soft-stop circuit and method for a voltage regulator

2011-03-15

2011-03-15

Tso, Edward (Department: 2858)

Electricity: battery or capacitor charging or discharging

Battery or cell discharging

With charging

C320S137000, C323S222000, C323S282000

Reexamination Certificate

active

07906939

ABSTRACT:
A soft-stop circuit and method are provided for a voltage regulator which converts a battery voltage to an output voltage according to a feedback voltage derived from the output voltage and a reference voltage, to control the voltage regulator to enter a soft-stop state when the battery voltage is lower than a threshold level, and in which state, and the output voltage is controlled to decrease so as for the battery voltage to have a slower decreasing speed and in turn a longer battery lifetime.

REFERENCES:
patent: 6351110 (2002-02-01), Pappalardo et al.
patent: 7180272 (2007-02-01), Okahara et al.
patent: 7411379 (2008-08-01), Chu et al.
patent: 7612543 (2009-11-01), Yu et al.

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