Method and apparatus for synchronous buck with active...

Details Method and apparatus for synchronous buck with active... Method and apparatus for synchronous buck with active...

2011-04-19

2011-04-19

Patel, Rajnikant B (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

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

C323S285000

Reexamination Certificate

active

07928713

ABSTRACT:
A circuit is disclosed that includes a buck voltage regulator electrically coupled to an active current modulator. The active current modulator is operable to detect a negative current in the low-side switch of the buck voltage regulator circuit during a light mode operation. Whenever the negative current is detected, the active negative current modulator causes the low-side switch to stay ON in a linear mode and limits the negative current to a predetermined current level.

REFERENCES:
patent: 6329801 (2001-12-01), Zuniga et al.
patent: 7746042 (2010-06-01), Williams et al.

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