TS431AIZ-AP

Overview

The TS431AIZ-AP is a low-voltage, three-terminal adjustable shunt voltage reference manufactured by STMicroelectronics. It operates within an input voltage range of 2.5V to 36V and provides an adjustable output voltage from 2.495V up to 36V. The device supports a maximum cathode current of 100mA and maintains a tight initial accuracy tolerance of ±1%. Designed for through-hole mounting, it utilizes the TO-92-3 (TO-226AA) package configuration. The component functions reliably across an extended industrial temperature range spanning from -40°C to +105°C.

Feature Summary

• Adjustable shunt voltage reference topology with external resistor setting
• Low-voltage operation capability starting at 2.495V reference threshold
• High precision initial accuracy with ±1% tolerance specification
• Robust thermal performance suitable for wide industrial temperature environments

Applications

• Precision voltage regulation in switching power supplies
• Reference voltage source for analog-to-digital converter circuits
• Feedback control loops in linear and switching regulators
• Portable equipment requiring stable low-voltage references

Procurement Notes

Verify the specific suffix designation against official manufacturer documentation to confirm pinout compatibility and electrical tolerances. Ensure the procurement channel sources genuine components to guarantee adherence to specified operating temperatures and accuracy standards. Cross-reference the package type with design requirements to prevent mechanical integration issues during assembly.

Selection Notes

Select this component when a low-cost, high-precision adjustable reference is required in a through-hole package. It serves as a direct functional replacement for standard TL431 devices where lower minimum operating voltages are beneficial. Consider its ±1% accuracy and 100mA drive capability for applications demanding stable feedback without complex compensation networks.

Part Context

This part belongs to the widely adopted TL431 family of programmable shunt regulators. It offers a cost-effective solution for voltage monitoring and regulation tasks. The TS431 variant specifically optimizes performance at lower voltages compared to traditional counterparts, making it suitable for modern low-voltage digital and mixed-signal systems requiring precise reference points.

Replacement Considerations

Compatible substitutes include the TL431AIZ-AP and generic TL431 variants from other manufacturers, provided they match the TO-92-3 package and ±1% accuracy class.