TECHNICAL DATA



Programmable Precision Reference
TL431

PIN CONNECTIONS
FEATURES

• Programmable Output Voltage to 40V
• Low Dynamic Output Impedance 0.2Ω
• Sink Current Capability of 0.1 mA to 100 mA
• Equivalent Full-Range Temperature
Coefficient of 50 ppm/
o
C
• Temperature Compensated for Operation over
Full Rated Operating Temperature Range
• Low Output Noise Voltage
• Fast Turn on Response
• TO-92, SOP- 8, SOT-23, SOT-89 packages


CATHODE
ANODE
REFERENCE



DESCRIPTION

The TL431 is a three-terminal adjustable regulator series with a guaranteed thermal stability over applicable temperature ranges.
The output voltage may be set to any value between Vref (approximately 2.5 volts) and 40 volts with two external resistors. These
devices have a typical dynamic output impedance of 0.2Ω. Active output circuitry provides a very sharp turn-on characteristic,
making these devices excellent replacement for zener diodes in many applications.
The TL431 is characterized for operation from -25
o
C to +85
o
C.


SYMBOL FUNCTIONAL BLOCK DIAGRAM













ABSOLUTE MAXIMUM RATINGS
(Operating temperature range applies unless otherwise specified)
Characteristic Symbol Value Unit
Cathode Voltage V
KA
40 V
Cathode Current Range (Continuous) I
K
-100 ~ 150 mA

Reference Input Current Range I
REF
0.05 ~ 10 mA
Power Dissipation at 25
o
C:
SOP, TO – 92 Package (R
‰
JA
= 178
o
C/W)
SOT Package (R
‰
JA
= 625
o
C/W)
P
D

0.7
0.2

W
W
Junction Temperature Range T
J
-40 ~ 150
o
C
Operating Temperature Range T
g
-40 ~ +85
o
C

Storage Temperature Range T
stg
-65 ~ +150
o
C



Rev. 00