TL431BIDBZR-QR

Overview

The TL431BIDBZR-QR is a three-terminal adjustable shunt regulator from the Nexperia TL431 family, designed for surface-mount applications in SOT-23 (TO-236AB) packages. It features a reference voltage tolerance of 0.5% and operates within an ambient temperature range of -40°C to 85°C. The device supports programmable output voltages up to 36V via two external resistors, with a typical temperature drift of 9mV between 0°C and 70°C. It is qualified under AEC-Q101 standards, ensuring reliability for automotive environments.

Feature Summary

• AEC-Q101 qualified for automotive grade reliability
• Programmable output voltage up to 36V using external resistors
• Low output impedance with typical value of 0.2Ω
• Sink current capability ranging from 1mA to 100mA

Applications

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

Procurement Notes

Verify component authenticity through authorized Nexperia distributors or certified supply chain partners. Confirm that the specific suffix indicates the correct package variant and automotive qualification status. Request official traceability documentation to ensure compliance with AEC-Q101 requirements. Validate part markings against manufacturer specifications to prevent counterfeit components.

Selection Notes

Select this component when high precision and automotive durability are required. The 0.5% initial accuracy suits tight regulation needs. Ensure the operating temperature range aligns with system constraints. Consider the SOT-23 footprint for space-limited PCB layouts. Verify input voltage limits do not exceed maximum ratings during transient conditions.

Part Context

This device belongs to the widely used TL431 series of programmable zener diodes. It serves as a direct replacement for standard TL431 variants while offering enhanced automotive-grade testing. The B-grade designation specifies the tighter 0.5% tolerance compared to standard grades. It integrates active output circuitry for sharp turn-on characteristics.

Replacement Considerations

Compatible substitutes include TL431AQDBZR and TL431BMFDT. Verify pinning configuration compatibility before substitution. Ensure thermal performance matches original design requirements.