Texas Instruments LM431
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 (VREF) up to 36 V merely by selecting two external resistors that act as a voltage divided network. The LM431 is available in space-saving SOIC-8, SOT-23, and TO-92 packages.| Part No. | LM431 |
|---|---|
| Datasheet | LM431 Download |
| Manufacturer |  Texas Instruments |
| Description | Adjustable Precision Zener Shunt Regulator |
| Buy | Stock & Price |
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
Due to the sharp turnon characteristics this device is an excellent replacement for many Zener diode applications. 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.
