TL431BQDBZR,215

Overview

The TL431BQDBZR,215 is a three-terminal adjustable precision shunt regulator manufactured by Nexperia. It operates within an output voltage range of 2.495 V to 36 V, set via two external resistors. The device features a reference voltage tolerance of ±0.5% and supports a sink current capability from 1 mA to 100 mA. It is qualified under the AEC-Q100 Grade 1 standard for automotive applications and functions reliably across a temperature range of -40°C to +125°C.

Feature Summary

• AEC-Q100 Grade 1 qualified for automotive reliability
• High precision with ±0.5% reference voltage tolerance
• Low output noise and typical output impedance of 0.2 Ω

Applications

• Shunt regulator circuits
• Precision constant current sinks
• Isolated feedback loops for Switch Mode Power Supplies (SMPS)

Procurement Notes

Verify the specific suffix '215' corresponds to the required tape-and-reel packaging configuration. Confirm that the B-grade accuracy meets the design requirements. Ensure the SOT-23 package dimensions align with the PCB footprint. Validate the AEC-Q100 qualification status against specific project standards before finalizing procurement.

Selection Notes

Select this component when high accuracy is required in compact surface-mount designs. The B-grade variant offers tighter tolerance than standard or A-grade options. Consider the mirrored pinning configuration if board layout constraints require it. Verify thermal performance within the specified operating temperature range.

Part Context

This part belongs to the TL431 family of programmable zener diodes. It serves as a direct replacement for generic TL431 devices where higher precision and automotive qualification are necessary. The device integrates a bandgap reference and error amplifier into a small SOT-23 package.

Replacement Considerations

Compatible substitutes include TL431AQDBZR,215 and TL431BFDT,215. Verify pinout compatibility, specifically regarding normal versus mirrored pinning configurations, before substitution.