TL431AQDBVRE4

Overview

The TL431AQDBVRE4 is an adjustable precision shunt regulator manufactured by Texas Instruments. It operates within a supply voltage range of 2.495 V to 36 V and provides an initial accuracy of ±1%. The device supports a maximum cathode current of 100 mA with a minimum operating current of 700 µA. It features a temperature coefficient of 92 PPM/°C and functions reliably across an extended temperature range from -40°C to +125°C. Packaged in a SOT-23-5 surface-mount case, it complies with RoHS3 standards.

Feature Summary

• Adjustable output voltage capability spanning from 2.495 V up to the maximum input limit
• High precision regulation with ±1% initial accuracy tolerance
• Extended industrial temperature operation suitable for demanding environments

Applications

• Precision voltage reference sources in power management circuits
• Programmable linear regulators requiring stable reference voltages
• Feedback control loops in switching power supplies

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm that the specific suffix matches the required package and quality grade. Cross-reference datasheet revisions to ensure compatibility with existing design specifications. Validate compliance with environmental regulations such as RoHS3 before integration into final products.

Selection Notes

Select this component when precise voltage referencing is critical within tight space constraints. The SOT-23-5 package offers a compact solution for surface-mount assembly. Ensure the application voltage does not exceed the 36 V maximum rating. Consider the thermal performance requirements given the wide operating temperature range and low standby current characteristics.

Part Context

This part belongs to the TL431 family of programmable shunt regulators. It serves as a versatile alternative to fixed voltage references like Zener diodes. The device integrates a bandgap reference, error amplifier, and output transistor. It enables designers to create accurate voltage dividers and feedback networks using external resistors.

Replacement Considerations

Direct substitutes include the TL431AQDBVR. Verify pinout compatibility and electrical parameter equivalence before substitution. Check for any changes in packaging or marking schemes that might affect automated assembly processes.