2%, 1%, or 0.5% accuracy, adjustable precision Zener shunt regulator
Product details
Parameters
Package | Pins | Size
Features
- 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
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.
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Technical documentation
= Top documentation for this product selected by TI
| Type | Title | Date | |
|---|---|---|---|
| * | Datasheet | LM431 Adjustable Precision Zener Shunt Regulator datasheet (Rev. H) | Jan. 06, 2016 |
| Selection guides | 431 Device Nomenclature (Rev. B) | Sep. 18, 2019 | |
| White papers | Voltage Supervisor and Reset ICs: Tips, Tricks and Basics | Jun. 28, 2019 | |
| White papers | Tips and tricks for designing with voltage references | May 30, 2017 | |
| Application notes | Low-cost flyback solutions for 10-mW standby power | Jan. 22, 2014 | |
| Application notes | AN-2102 LM3464 and LM5021 DHC 25W Reference Designs (Rev. A) | May 01, 2013 | |
| Application notes | Precision Output Current Limiting Using Average Current Monitor Feature | Jun. 21, 2011 | |
| Application notes | TO-92 Packing Options / Ordering Instructions (Rev. A) | Jun. 23, 2010 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Design tools & simulation
SNVMAB5A.ZIP (49 KB) - PSpice Model
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Features
- Leverages Cadence PSpice Technology
- Preinstalled library with a suite of digital models to enable worst-case timing analysis
- Dynamic updates ensure you have access to most current device models
- Optimized for simulation speed without loss of accuracy
- Supports simultaneous analysis of multiple products
- (...)
SHUNT_VOLTAGE_REFERENCE_RESISTOR_CALCULATOR — This external resistor quick-start calculator tool lets you easily calculate valid external resistor values relative to voltage reference, supply and load-current bounds. With these inputs, you can instantly view the resulting calculations and use the color-coded indications to understand (...)
Features
- Case-specific tool to calculate external resistor value associated with shunt voltage reference
- Input fields for: voltage reference, supply voltage, load current and Iq bound values
- Real-time effects of input values on schematic
- Quick indicators notifying user of valid and invalid outputs
- Error messages (...)
SNVC184.ZIP (53 KB)
Reference designs
CAD/CAE symbols
| Package | Pins | Download |
|---|---|---|
| SOIC (D) | 8 | View options |
| SOT-23 (DBZ) | 3 | View options |
| TO-92 (LP) | 3 | View options |
Ordering & quality
Support & training
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