Texas Instruments TL431 Adjustable Precision Shunt Regulator SOT-23
Texas Instruments TL431 adjustable precision shunt regulator in SOT-23-3 package. 2.495 V to 36 V reference range, 0.5% initial accuracy.
The Texas Instruments TL431 Adjustable Precision Shunt Regulator offers 0.5% initial accuracy and an adjustable output voltage from 2.495 V to 36 V in a compact SOT-23-3 surface-mount package.
Overview
The TL431 is an adjustable shunt regulator designed to replace zener diodes in numerous circuit designs. It has a typical output impedance of 0.2 Ω and an active output circuit that produces a sharp turn-on characteristic, supporting stable voltage reference points.
Adjustable Output
The output voltage can be set to any value between a reference voltage (Vref) of approximately 2.5 V and 36 V using only two external resistors. The device supports a sink current from 1 mA to 100 mA, accommodating a range of load conditions.
Performance and Reliability
The TL431 is designed for demanding environments, with low output drift over temperature across a full operating range of -40 °C to 125 °C. Its low output noise supports clean and precise voltage regulation in sensitive applications. The device is manufactured without antimony or bromine (Sb/Br).
Key Specifications
- Reference voltage range: Adjustable from 2.495 V to 36 V
- Initial accuracy: 0.5%
- Temperature coefficient: 92 ppm/°C
- Typical output impedance: 0.2 Ω
- Sink current: 1 mA to 100 mA
- Operating temperature range: -40 °C to 125 °C
- Package: SOT-23-3 surface-mount
Applications
This component is a building block in power management systems, used in adjustable power supplies, switching power supplies, and onboard regulation circuits. Its stated suitability extends to automotive, aerospace, defence, and military applications.
Choose the Texas Instruments TL431 Adjustable Precision Shunt Regulator for designs that require a precise, adjustable voltage reference in a compact SOT-23-3 package.
- Adjustable power supplies
- Switching power supplies
- Onboard regulation circuits
- Automotive applications
- Reference Voltage Range: 2.495 V to 36 V
- Initial Accuracy: 0.5%
- Temperature Coefficient: 92 ppm/°C
- Typical Output Impedance: 0.2 Ω
- Sink Current: 1 mA to 100 mA
- Operating Temperature Range: -40 °C to 125 °C
- Package: SOT-23-3 surface-mount
- Special Feature: Low output drift over temperature
- Special Feature: Low output noise
- Special Feature: Manufactured without antimony or bromine (Sb/Br)
- Width: 3.3
- Depth: 1.5
- Height: 4.3
- Weight: 0.002 g
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