LM431_16 Datasheet, PDF (1/32 Pages) Texas Instruments – Adjustable Precision Zener Shunt Regulator

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LM431
SNVS020H – MAY 2000 – REVISED JANUARY 2016
LM431 Adjustable Precision Zener Shunt Regulator
1 Features
•1 Average Temperature Coefficient 50 ppm/°C
• Temperature Compensated for Operation Over
the Full Temperature Range
• Programmable Output Voltage
• Fast Turnon Response
• Low-Output Noise
• Low-Dynamic Output Impedance
• Available in Space-Saving SOIC-8, SOT-23, and
TO-92 Packages
2 Applications
• Adjustable Voltage or Current Linear and
Switching Power Supplies
• Voltage Monitoring
• Current Source and Sink Circuits
• Circuits Requiring Precision References
• Zener Diode Replacements
3 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 2.5 V (V_REF) up
to 36 V merely by selecting two external resistors that
act as a voltage divided network. Due to the sharp
turnon characteristics this device is an excellent
replacement for many Zener diode applications.
The LM431 is available in space-saving SOIC-8,
SOT-23, and TO-92 packages.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
SOIC (8)
4.90 mm × 3.91 mm
LM431
SOT-23 (3)
2.92 mm × 1.30 mm
TO-92 (3)
4.30 mm × 4.30 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
LM431 Symbol
Functional Block Diagram
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.