TL431ACLPRE3

Overview

The TL431ACLPRE3 is a precision programmable shunt voltage reference manufactured by Texas Instruments. It operates within an adjustable output voltage range of 2.495 V to 36 V and supports a maximum cathode current of 100 mA. The device features an initial accuracy of ±1% and a temperature coefficient of 92 ppm/°C. It is housed in a TO-92-3 through-hole package with a maximum input voltage rating of 37 V. The component functions as a three-terminal device, utilizing the reference pin for threshold control relative to the common anode.

Feature Summary

• Provides precise adjustable voltage regulation via a three-terminal shunt topology
• Delivers high initial accuracy for stable reference applications
• Features sharp turn-on characteristics compared to standard Zener diodes

Applications

• Voltage regulation in power supply circuits
• Precision reference sources for analog signal processing
• Comparator threshold setting in control systems

Procurement Notes

Verify component authenticity against official Texas Instruments documentation due to end-of-life status. Confirm package integrity and lead condition upon receipt. Ensure storage conditions comply with manufacturer guidelines to prevent degradation. Cross-reference datasheet revisions to verify electrical parameter consistency before integration into final designs.

Selection Notes

Select this component when a low-cost, high-accuracy adjustable reference is required in a through-hole package. Consider the ±1% initial accuracy and 92 ppm/°C temperature coefficient for thermal stability requirements. Evaluate the 100 mA current capability against load demands. Verify compatibility with existing PCB footprints designed for TO-92-3 packages.

Part Context

This part belongs to the TL431 series, originally released in 1978 as an improved version of the TL430. It serves as a widely adopted precision adjustable shunt regulator in power management integrated circuits. The device is categorized under PMIC voltage references and is commonly used in industrial and consumer electronics for stable voltage referencing.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material.