Switching regulator and control circuit thereof, and method...

Details Switching regulator and control circuit thereof, and method... Switching regulator and control circuit thereof, and method...

2010-02-05

2011-12-27

Berhane, Adolf (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

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

C323S283000, C323S288000

Reexamination Certificate

active

08085022

ABSTRACT:
The present invention discloses a switching regulator and control method thereof, and a method for determining On-time in switching regulator. The switching regulator comprises: a power switch circuit including at least one power transistor switch which operates to convert an input voltage to an output voltage; a PWM generation circuit for generating a duty signal in a normal operation mode according to a feedback signal relating to the output voltage; a pulse skipping circuit for determining On-time in a pulse skipping mode according to a node with non-constant voltage level, the node being connected with the power transistor switch; and a driver circuit for driving the at least one power transistor switch according to one of the outputs from the PWM generation circuit and the pulse skipping circuit.

REFERENCES:
patent: 6396252 (2002-05-01), Culpepper et al.
patent: 7456624 (2008-11-01), Sheng et al.
patent: 7471072 (2008-12-01), Fogg et al.
patent: 2006/0268974 (2006-11-01), Chu et al.
patent: 2009/0079408 (2009-03-01), Qiao et al.
patent: 2009/0273326 (2009-11-01), Lipcsei
patent: 2010/0026256 (2010-02-01), Liu et al.

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