FP133

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Rev. 0.9

8/10

REF

GND

CA

2.5V

Reference

R2

IF

R3

R1

Voltage Shunt Regulator

The figure below shows the FP133 voltage shunt regulator. It includes an internal 2.5V voltage

reference connecting to the comparator inverting input. The comparator’s high cathode current sink

ability is designed for photo-coupler driving.

2.5V

R2

R1

1













 



---- (4)

Note

1. Connect a compensation network between CA and REF pins to reduce high output voltage

ringing during light loading or transient.

2. R3 is selectable for dynamic loading feedback.