2008. 7. 3

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Revision No : 0

Cathode (K)

Anode (A)

Reference (R)

+

-

Reference (R)

Anode (A)

Cathode (K)

PROGRAMMABLE PRECISION REFERENCES

The TL431 Series integrated circuits are three-terminal programmable shunt regulator diodes.

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

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

SEMICONDUCTOR

TECHNICAL DATA

TL431 Series

BIPOLAR LINEAR INTEGRATED CIRCUIT

Type No.

Operating Voltage(V)

Package

Marking

TL431

2.5~36

TO-92

TL431A

TL431B

TL431F

SOT-89

3D

TL431AF

3E

TL431BF

3F

ITEM

Package Code

TL431

Code

Tolerance (%)

Code

Package

2.2

TO-92

A

1.0

F

SOT-89

B

0.5

BLOCK DIAGRAM