LM431

Product Folder Sample & Buy Technical Documents Tools & Software Support & Community 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 (VREF) 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 N...