TS3431AILT

Overview

The TS3431AILT is an adjustable shunt voltage reference manufactured by STMicroelectronics, housed in a SOT-23-3 surface-mount package. It provides an output voltage range from 1.24 V to 24 V, set via an external resistor divider. The device features a typical initial accuracy of ±1% at 25 °C and a temperature coefficient of 100 ppm/°C. It supports a cathode current range from 0.4 mA to 100 mA and operates within an industrial temperature range of -40 °C to +125 °C.

Feature Summary

• Adjustable output voltage capability spanning 1.24 V to 24 V using external resistors
• High precision with ±1% initial accuracy at room temperature
• Robust thermal stability across the full industrial operating temperature range

Applications

• Precision power supply regulation circuits
• Battery-operated equipment requiring stable reference voltages
• Industrial control systems demanding high reliability

Procurement Notes

Verify the specific suffix 'AILT' to confirm the ±1% accuracy grade and tape-and-reel packaging format. Ensure compatibility with the SOT-23-3 footprint during PCB layout. Confirm RoHS compliance status for environmental regulations. Validate that the selected component meets the required sink current specifications for the target application design.

Selection Notes

Select this component when space-constrained designs require a precise, adjustable reference in a small SOT-23-3 package. It serves as a direct performance-compatible alternative to industry-standard TL431 devices. Choose this variant over lower-accuracy options when tighter tolerance is critical for circuit stability and measurement precision.

Part Context

This part belongs to the TS3431 series of adjustable shunt voltage references. The series offers multiple precision grades, including ±2%, ±1%, ±0.5%, and ±0.25%. The TS3431AILT specifically denotes the ±1% accuracy version. These components are designed for applications where saving board space is critical while maintaining high performance standards.

Replacement Considerations

The TS3431IZ is listed as a discontinued equivalent. Verify pinout and electrical parameter compatibility before substituting with other adjustable shunt references or generic TL431 clones.