TL1431AIZT

Overview

The TL1431AIZT is a programmable shunt voltage reference manufactured by STMicroelectronics. It operates within an input voltage range of 2.5 V to 36 V and provides an adjustable output voltage across the same span using two external resistors. The device guarantees high initial accuracy with a tolerance of ±0.4% and maintains stability over a wide temperature range from -40 °C to +105 °C. It features a typical dynamic impedance of 0.2 Ω and supports a cathode current range from 1 mA to 100 mA. The component is housed in a TO-92-3 through-hole package.

Feature Summary

• Adjustable output voltage capability ranging from 2.5 V to 36 V via external resistor network
• High precision performance with guaranteed initial accuracy of ±0.4%
• Wide operating temperature range suitable for industrial environments (-40 °C to +105 °C)
• Low dynamic output impedance ensuring stable regulation under varying load conditions

Applications

• Precision voltage references in power supply circuits
• Programmable linear regulators requiring stable reference nodes
• Battery-operated devices needing accurate voltage monitoring
• Industrial control systems utilizing shunt regulation topologies

Procurement Notes

Verify the specific suffix 'AIZT' against official STMicroelectronics documentation to confirm pinout compatibility and packaging details. Ensure that the required accuracy class matches the ±0.4% specification rather than standard variants. Confirm RoHS compliance status for the specific manufacturing batch prior to integration into final assemblies.

Selection Notes

Select this component when precise voltage referencing is critical within a shunt regulator topology. The ±0.4% accuracy makes it suitable for applications demanding tighter tolerances than standard TL431 equivalents. Consider the TO-92-3 package constraints for thermal management and board space requirements compared to surface-mount alternatives.

Part Context

This part belongs to the TL1431 series, which represents an upgraded version of the industry-standard TL431 family. The TL1431 series offers improved accuracy and temperature stability characteristics. It serves as a direct functional replacement for legacy adjustable shunt references while providing enhanced performance metrics for modern electronic designs.

Replacement Considerations

Direct substitutes include the TL1431IZ and TL1431AIYDT from STMicroelectronics. Cross-manufacturer equivalents such as the LM431AIZ or KA431AZBU may be considered if pinout and electrical specifications align perfectly with the design requirements.