Method and apparatus for power management of a low dropout...

Details Method and apparatus for power management of a low dropout... Method and apparatus for power management of a low dropout...

2011-04-19

2011-04-19

Berhane, Adolf (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

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

C323S282000, C327S540000

Reexamination Certificate

active

07928707

ABSTRACT:
A method of switching a low dropout regulator includes determining an actual active time of a power request from an electronic device; enabling the low dropout regulator in response to said power request at a time corresponding to a start of the actual active time of the power request for an active enabled time having a duration at least the same as the actual active time and long enough to sufficiently settle the output voltage of the low dropout regulator; and disabling the low dropout regulator. In embodiments, the active enabled time is prolonged beyond the actual active time of the power request for all or at least some power requests. An electronic device includes circuits for controlling the switching of a low dropout in the described manner.

REFERENCES:
patent: 7626367 (2009-12-01), Tsai
patent: 2007/0152646 (2007-07-01), Godil
patent: 2007/0249305 (2007-10-01), Hsu et al.
patent: 2007/0252564 (2007-11-01), De Nisi et al.
Oliver Weinfurtner et al, “Advanced Controlling Scheme for a DRAM Voltage Generator System,” IEEE Journal of Solid-State Circuits, vol. 35, No. 4, Apr. 2000.

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