TLV431AQE5TA

Overview

The TLV431AQE5TA is an automotive-compliant, three-terminal adjustable shunt regulator manufactured by Diodes Incorporated. It provides a reference voltage of 1.24V with an initial tolerance of 1%. The device supports an adjustable output voltage range from 1.24V to 18V and handles cathode currents up to 15mA. Qualified to AEC-Q100 Grade 1 standards, it operates within a temperature range of -40°C to +125°C. The component is housed in a surface-mount SOT-25 package.

Feature Summary

• Offers excellent temperature stability for precision applications
• Capable of replacing Zener diodes to improve performance
• Supports high-accuracy adjustable shunt references

Applications

• Adjustable low voltage reference circuits
• Increasing output voltage of fixed linear regulators
• High current shunt regulation using external transistors
• Series regulators with integrated current limiting

Procurement Notes

Verify the specific ordering suffix E5TA corresponds to the SOT-25 package configuration. Confirm that the 1% tolerance band (A) meets the required accuracy specifications for the design. Ensure the procurement channel is authorized to guarantee compliance with AEC-Q100 Grade 1 qualification and PPAP documentation requirements.

Selection Notes

Select this component when automotive reliability and precise voltage referencing are required. The 1% tolerance offers a balance between cost and accuracy compared to tighter bands. Verify that the application circuit can maintain the minimum cathode current of 80µA for proper regulation across the full operating temperature range.

Part Context

This part belongs to the TLV431Q family of automotive-compliant shunt regulators. It shares functional similarities with standard TLV431 devices but includes enhanced qualification for automotive environments. The SOT-25 package variant provides a compact footprint suitable for space-constrained PCB layouts while maintaining thermal performance.

Replacement Considerations

Direct replacements include other TLV431Q variants with different tolerances or packages, such as TLV431BQE5TA for 0.5% accuracy. Standard TLV431 parts may serve as substitutes if automotive qualification is not strictly required.

FAQ

How does the SOT-25 package affect pin connections?

In the SOT-25 package, the die is attached to Pin 2, creating an electrical contact between Pin 2 and Pin 5. Pin 2 must be left floating or connected to Pin 5.

What is the minimum cathode current required for regulation?

The minimum cathode current for regulation is typically 80µA at room temperature and increases to 100µA at maximum operating temperatures.