Frequency compensation scheme for a switching regulator...

Details Frequency compensation scheme for a switching regulator... Frequency compensation scheme for a switching regulator...

2007-01-30

2007-01-30

Vu, Bao Q. (Department: 2838)

Electricity: power supply or regulation systems

In shunt with source or load

Using choke and switch across source

C323S282000, C323S284000

Reexamination Certificate

active

11456432

ABSTRACT:
A compensation circuit in a monolithic switching regulator controller being incorporated in a closed loop feedback system of a switching regulator includes an amplifier configured in a unity gain feedback configuration with a first resistor and including a non-inverting input terminal receiving the feedback voltage and an inverting input terminal coupled to a first terminal of the switching regulator controller. The compensation circuit further includes a first capacitor and a third resistor connected in series between an input terminal and an output terminal of an error amplifier of the switching regulator controller. The first capacitor and the third resistor introduce a first zero in the closed loop feedback system. When a second capacitor is coupled to the first terminal of the switching regulator controller, a second zero is introduced in the closed loop feedback system. The second capacitor is an off-chip capacitor formed external to the monolithic switching regulator controller.

REFERENCES:
patent: 5617306 (1997-04-01), Lai et al.
patent: 5850139 (1998-12-01), Edwards
patent: 5889393 (1999-03-01), Wrathall
patent: 6531854 (2003-03-01), Hwang
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patent: 6828766 (2004-12-01), Corva et al.
patent: 6885176 (2005-04-01), Librizzi
patent: 6894471 (2005-05-01), Corva et al.
patent: 6963190 (2005-11-01), Asanuma et al.

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