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.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | LM431 Adjustable Precision Zener Shunt Regulator datasheet (Rev. H) | PDF | HTML | 06 Jan 2016 |
| Application brief | A Simple Constant Voltage Regulation Using the MODE Pin (Rev. A) | PDF | HTML | 15 Feb 2024 | |
| E-book | Tips and tricks for designing with voltage references (Rev. A) | 07 May 2021 | ||
| Selection guide | 431 Device Nomenclature (Rev. B) | 18 Sep 2019 | ||
| E-book | Voltage Supervisor and Reset ICs: Tips, Tricks and Basics | 28 Jun 2019 | ||
| Analog Design Journal | Low-cost flyback solutions for 10-mW standby power | 22 Jan 2014 | ||
| Application note | AN-2102 LM3464 and LM5021 DHC 25W Reference Designs (Rev. A) | 01 May 2013 | ||
| Application note | Precision Output Current Limiting Using Average Current Monitor Feature | 21 Jun 2011 | ||
| Application note | TO-92 Packing Options / Ordering Instructions (Rev. A) | 23 Jun 2010 |
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