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REV.-A
A. 1.1.10 L5431-AA
The 431 is a high-accuracy temperature-compensated shunt regulator. The output voltage can be set
anywhere between 2.5 V and 36 V through addition of two external resistors. The 431 is highly stable
and outputs a large current, so that it is capable of replacing various Zener diodes. The 431 is especially
suitable for driving the photodiode in the photocoupler section of the feedback circuit used in the RCC
system switching regulator.
• Temperature-compensated reference voltage (50 ppm/C TYP)
•
High response speed
•
Low noise
CATHODE
ANODE
REF
REF
NC
A
NC
Figure A-18. L5431-AA Pin Diagram
CATHODElll
(8IREFERENCE
Vref
~---L---oCathode
L -_ _- ' -
~
Anode
ANODE(6)
Figure A-19. L5431-AA Internal Circuit
A-23
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