TL431AILPM

Overview

The TL431AILPM is a precision programmable shunt voltage reference manufactured by Texas Instruments. It operates within a cathode voltage range of 2.5V to 36V and provides an adjustable output voltage determined by external resistors. The device features a typical initial accuracy of ±1% at 25°C, ensuring stable performance across its operating temperature range of -40°C to +85°C. Designed for high stability, it offers low temperature drift and low dynamic output impedance, making it suitable for applications requiring precise voltage regulation.

Feature Summary

• Provides a highly stable and precise reference voltage with low temperature drift characteristics
• Features a low dynamic output impedance for effective noise rejection and regulation
• Offers flexible output voltage adjustment via two external resistors over a wide range

Applications

• Precision power supply regulation circuits
• Voltage monitoring and threshold detection systems
• Replacement for standard Zener diodes in linear regulators

Procurement Notes

Verify the specific suffix 'PM' against official Texas Instruments documentation to confirm package type and availability status. Ensure compatibility with required thermal management and PCB layout constraints. Cross-reference datasheet revisions to confirm pinout consistency and electrical parameter tolerances before finalizing procurement specifications.

Selection Notes

Select this component when a reliable, adjustable shunt regulator is needed for circuit protection or feedback loops. Consider the ±1% tolerance and operating temperature range relative to system requirements. Evaluate the TO-92 package suitability for through-hole mounting versus surface area constraints compared to alternative SMD packages.

Part Context

This part belongs to the widely used TL431 family of programmable shunt regulators. It serves as a versatile alternative to fixed voltage references and Zener diodes. The device integrates a bandgap reference, error amplifier, and output transistor into a compact three-terminal configuration, facilitating easy integration into various analog control and power management designs.

Replacement Considerations

Direct substitutes include LM431 variants from other manufacturers that maintain identical pinouts and electrical characteristics. Verify equivalent accuracy grades and temperature ranges when selecting cross-brand alternatives to ensure functional parity in existing designs.