AQ431R
2.5V Shunt Ref/Amplifier
TO-92 and SOT23 Package
Preliminary Specification
Revision 1.6
June 15, 2007
General Description
The AQ431R is a three-terminal adjustable
shunt regulator based on a highly stable
bandgap reference and is an excellent
replacement for standard TL431 references
when used as a secondary feedback element
in Switch Mode Power Supplies.
The AQ431R meets all of the requirements of
the standard 431 specifications that are
needed to monitor the secondary output
voltage and provide the feedback signal to
the primary through an opto-coupler. It is
offered in both the very popular SOT23-3 and
TO-92 packages.
Applications
•
Power supply control loop
•
Low TC voltage reference
•
Power management applications
Features
•
Programmable precise output voltage
•
•
•
•
•
2.5V to 15V
Wide temp range: -40º to 85ºC standard
Improved stability with capacitive loads
Low TC voltage reference
Wide range of package options
RoHS compliant
Pin Configuration
Pin Descriptions
Pin Name
CATH
REF
ANODE
Function
Output and supply terminal, must be greater than 2.5V for normal operation
Input, nominally 2.495V in normal operation.
Ground and Substrate
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AQ431R
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