TL431/TL432
ADJUSTABLE PRECISION SHUNT REGULATOR
Description
The TL431 and TL432 are three terminal adjustable shunt
regulators offering excellent temperature stability and output
current handling capability up to 100mA. The output voltage
may be set to any chosen voltage between 2.5 and 36 volts
by selection of two external divider resistors.
The devices can be used as a replacement for zener diodes
in many applications requiring an improvement in zener
performance. Diodes’ TL431 has the same electrical
specifications as the industry standard ‘431 and is available
in 2 grades with initial tolerances of 1% and 0.5% for the
A and B grades respectively.
Pin Assignments
TL431
(Top View)
3
ANODE
1
2
CATHODE
REF
NEW PRODUCT
SOT23
NC
NC
1
2
3
(Top View )
5
ANODE
Features
•
•
Temperature range -40 to 125ºC
Reference Voltage Tolerance at 25°C
•
TL431A: 2.495V
±
1.0%.
•
•
•
•
•
•
TL431B: 2.495V
±
0.5%
Low Output Noise
0.2Ω Typical Output Impedance
Sink Current Capability: 1mA to 100mA
Adjustable Output Voltage: V
REF
to 36V
SOT23 and SOT25: Available in “Green” Molding
Compound (No Br, Sb) and Lead Free Finish/ RoHS
Compliant (Note 1)
CATHODE
4
REF
SOT25
TL432
(Top View)
3
ANODE
1
2
REF
CATHODE
Applications
SOT23
•
•
•
•
Opto-Coupler Linearisers
Shunt Regulators
Improved Zener
Variable Reference
Notes:
1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at
TL431/432
Document number: DS35050 Rev. 2 - 2
1 of 14
September 2010
© Diodes Incorporated
DIODES [ DIODES INCORPORATED ]
