SEMICONDUCTOR
TECHNICAL DATA
PROGRAMMABLE PRECISION REFERENCES
TL431 Series
BIPOLAR LINEAR INTEGRATED CIRCUIT
The TL431 Series integrated circuits are three-terminal programmable shunt regulator diodes.
These monolithic IC voltage reference operate as a low temperature coefficient zener which is programmable from V
ref
to 36 volts with two external resistors. These devices exhibit a wide operating current range of 1.0 to 100mA with a
typical dynamic impedance of 0.22 .The characteristics of these references make them excellent replacements for
zener diodes in many applications such as digital voltmeters, power supplies, and op amp circuitry. The 2.5 volt
reference makes it convenient to obtain a stable reference from 5.0 volt logic supplies, and since the TL431 Series
operates as a shunt regulator, it can be used as either a positive or negative voltage reference.
FEATURES
Divice Code Name :TL431 + V
ref
Code + Package Code
ITEM
Code
TL431
A
B
V
ref
Code
Tolerance (%)
2.2
1.0
0.5
Code
F
Package Code
Package
TO-92
SOT-89
Low Dynamic Output Impedance : 0.22 (Typ.).
Sink Current Capability of 1.0 to 100mA.
Equivalent Full-Range Temperature Coefficient of 50ppm/ (Typ.).
Temperature Compensated for Operation Over Full Rated Operating Temperature Range.
Low Output Noise Voltage.
LINE UP
Type No.
TL431
TL431A
TL431B
TL431F
TL431AF
TL431BF
Operating Voltage(V)
Package
TO-92
2.5~36
SOT-89
3D
3E
3F
Marking
BLOCK DIAGRAM
Cathode (K)
Cathode (K)
Reference (R)
Reference (R)
+
-
2.5V
ref
Anode (A)
Anode (A)
2008. 7. 3
Revision No : 0
1/6
KEC [ KEC(KOREA ELECTRONICS) ]
