TL431QDBZR,215

Overview

The TL431QDBZR,215 is a three-terminal adjustable precision shunt regulator manufactured by Nexperia. It operates within a voltage range of 2.495 V to 36 V and is housed in an SOT-23 surface-mount package with three pins. The device features an initial accuracy of ±0.5% and supports a maximum cathode current of 100 mA. It is qualified under the AEC-Q100 standard for Grade 1 automotive applications, ensuring reliability across a wide operating temperature range from -40°C to +125°C.

Feature Summary

• AEC-Q100 Grade 1 qualified for automotive electronics
• Adjustable output voltage via external resistors
• High precision reference with low temperature drift
• Low output impedance for stable regulation

Applications

• Isolated feedback loops in switch-mode power supplies
• Precision current limiting circuits
• Programmable linear regulators
• Voltage references in industrial control systems

Procurement Notes

Verify the specific suffix 'Q' indicates AEC-Q100 Grade 1 qualification during procurement. Confirm the package type matches the required PCB footprint. Ensure the supply chain source provides valid traceability documentation for automotive-grade components. Cross-reference the manufacturer's latest datasheet for any updates on pin configurations or thermal characteristics before finalizing orders.

Selection Notes

Select this component when high reliability in automotive environments is required. The ±0.5% accuracy suits applications needing tight voltage tolerance. Consider the SOT-23 package size for space-constrained designs. Verify that the input voltage does not exceed the maximum rating. Evaluate thermal dissipation requirements based on the expected load current and ambient temperature conditions.

Part Context

This part belongs to the TL431 family of programmable shunt regulators. It serves as a direct replacement for generic TL431 devices where automotive qualification is mandatory. The 'Q' designation specifically denotes compliance with AEC-Q100 standards. It is widely used in power management circuits requiring precise voltage referencing and regulation.

Replacement Considerations

Compatible substitutes include other AEC-Q100 qualified TL431 variants from manufacturers such as Texas Instruments or ON Semiconductor. Ensure the replacement maintains the same SOT-23-3 package and ±0.5% accuracy. Verify that the substitute meets the same electrical specifications for reference voltage and current handling capabilities.