SNVS020G – MAY 2000 – REVISED APRIL 2013
LM431 Adjustable Precision Zener Shunt Regulator
Check for Samples:
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FEATURES
Average Temperature Coefficient 50 ppm/°C
Temperature Compensated for Operation Over
the Full Temperature Range
Programmable Output Voltage
Fast Turn-On Response
Low Output Noise
DESCRIPTION
The LM431 is a 3-terminal adjustable shunt regulator
with ensured temperature stability over the entire
temperature range of operation. The output voltage
may be set at any level greater than 2.5V (V
REF
) up to
36V merely by selecting two external resistors that
act as a voltage divided network. Due to the sharp
turn-on characteristics this device is an excellent
replacement for many zener diode applications.
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Connection Diagram
Figure 1. TO-92: Plastic Package
Top View
A.
Note: NC = Not internally connected.
Figure 2. SOT-23: 3-Lead Small Outline
Top View
Figure 3. SOIC: 8-Pin Surface Mount
Top view
Symbol and Functional Diagrams
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Copyright © 2000–2013, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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