TL431QDBVTE4

Overview

The TL431QDBVTE4 is an automotive-grade, adjustable precision shunt regulator manufactured by Texas Instruments. It operates within a voltage range of 2.495 V to 36 V and supports a maximum cathode current of 100 mA. The device features an initial accuracy of 2% and a maximum temperature coefficient of 92 ppm/°C. Designed for surface-mount applications, it utilizes a SOT-23 package with three pins. The component functions reliably across an extended temperature range from -40°C to +125°C, ensuring stable performance in demanding automotive environments.

Feature Summary

• Automotive-grade qualification for reliable operation in vehicle electronics
• Adjustable output voltage capability spanning 2.495 V to 36 V
• Precision regulation with defined initial accuracy and low temperature drift

Applications

• Automotive power supply regulation circuits
• Voltage reference sources in automotive control modules
• Feedback networks in DC-DC converters for vehicles

Procurement Notes

Verify the specific suffix 'E4' against the manufacturer's latest documentation to confirm compliance with RoHS directives and lead-free manufacturing standards. Ensure the selected package variant matches the intended PCB footprint requirements. Confirm that the automotive grade designation aligns with the target application's environmental stress specifications before finalizing procurement decisions.

Selection Notes

Select this component when automotive reliability and precise voltage referencing are required in space-constrained designs. The SOT-23 package offers a compact solution suitable for high-density board layouts. Consider the 100 mA current handling capability and wide operating temperature range when designing for harsh automotive thermal conditions. Verify compatibility with existing circuit topologies requiring adjustable shunt regulation.

Part Context

This part belongs to the TL431 family of programmable parallel voltage references. The 'Q' prefix indicates automotive qualification, while 'DBVT' specifies the SOT-23-5 package configuration. The 'E4' suffix typically denotes environmental compliance attributes such as lead-free status. This series serves as a versatile reference element in power management systems requiring stable voltage thresholds.

Replacement Considerations

Direct substitutes include other automotive-qualified variants within the TL431 family, such as TL431QDBZTG4 or TL431QDR, provided they match the required package and electrical specifications. Cross-manufacturer equivalents may require verification of pinout compatibility and thermal performance characteristics.