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 Respons
• Provided Pb-Free packages from the end of 2004
PIN CONNECTIONS

















DESCRIPTION

The TL431I 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 TL431I is characterized for operation from -60
o
C to +125
o
C.




SYMBOL FUNCTIONAL BLOCK DIAGRAM













ABSOLUTE MAXIMUM RATINGS
(Operating temperature range applies unless otherwise specified)
Characteristic Symbol Value Unit
Cathode Voltage V
KA
42 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:
TO – 92 Package (R
!
JA
= 178
o
C/W)
SOT – 23 – 3 Package (R
!
JA
= 625
o
C/W)
P
D

0.7
0.2

W
W
Junction Temperature Range T
J
0 ~ 150
o
C
Operating Temperature Range T
g
-60 ~+125
o
C

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


TL431I Adjustable Precision Shunt Regulator (I Grade)
1
2
3
4
8
7
6
5
CATHODE
ANODE
ANODE
NC
REF
ANODE
ANODE
NC
SO8
TL431ACMX