TL431BQDBZR

Overview

The TL431BQDBZR is an adjustable precision shunt regulator from the Texas Instruments TL431 family, housed in a SOT-23-3 surface-mount package. It operates within a voltage range of 2.495 V to 36 V and offers an initial accuracy of ±0.5%. The device supports a maximum cathode current of 100 mA and functions reliably across an extended temperature range of -40°C to +125°C.

Feature Summary

• Provides stable reference voltage with high initial accuracy for precise circuit regulation
• Capable of handling significant cathode current for robust power management applications
• Designed for automotive environments with catalog-grade reliability specifications

Applications

• Automotive power supply regulation circuits
• Precision voltage reference sources in industrial equipment
• Battery management system monitoring
• Linear regulator feedback loops

Procurement Notes

Verify the specific suffix 'B' indicates the ±0.5% accuracy grade during procurement. Confirm the 'Q' designation aligns with required automotive qualification standards. Ensure the DBZR package variant matches the PCB footprint requirements. Cross-reference the datasheet revision to confirm compatibility with existing design parameters.

Selection Notes

Select this component when high accuracy and automotive reliability are required in a compact surface-mount form factor. Compare against standard TL431 variants if lower accuracy or non-automotive grades suffice. Consider thermal performance and current limits relative to the specific application load requirements.

Part Context

This part belongs to the widely used TL431 series of programmable shunt regulators. It serves as a cost-effective alternative to Zener diodes, offering superior stability and adjustability. The automotive-grade version ensures compliance with stringent quality and reliability standards for vehicle electronics.

Replacement Considerations

TL431BQDBZRQ1 is a verified equivalent with identical electrical characteristics and packaging.