10

Date: 03/25/05

SP7653 Wide Input Voltage Range, 1.3MHz, Buck Regulator

© Copyright 2005 Sipex Corporation

Bode Plot of Type III Error Amplifier Compensation.

Type III Error Amplifier Compensation Circuit

APPLICATIONS INFORMATION

Frequency

(Hz)

Error Amplifier Gain

Bandwidth Product

Condition:

C22 >> CP1, R1 >> RZ3

20 Log (RZ2/R1)

Gain

(dB)

CP1

RZ2

CZ2

-

+

6

5

VFB

COMP

+

- 0.8V

CF1

VOUT

R1

68.1k, 1%

R

SET

CZ3

RZ3

R

SET

=54.48/ (V

OUT

-0.8V)(kΩ)