TL431BMFDT-QR

Overview

The TL431BMFDT-QR is a three-terminal shunt regulator from the Nexperia TL431 family, housed in an SOT-23 package. It features a reference voltage tolerance of 0.5% and operates within a temperature range of -40°C to +125°C. The device supports programmable output voltages up to 36V using two external resistors. It is qualified under AEC-Q101 standards for automotive applications.

Feature Summary

• AEC-Q101 qualified for automotive reliability
• High precision with 0.5% reference voltage tolerance
• Wide operating temperature range suitable for harsh environments

Applications

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

Procurement Notes

Verify component authenticity through authorized Nexperia distributors or official channels. Confirm AEC-Q101 qualification status matches specific project requirements. Check datasheet revisions for any pinning configuration updates between standard and mirrored variants before finalizing PCB layouts.

Selection Notes

Select this variant when high precision and automotive-grade reliability are required. The mirrored pinning configuration differs from standard versions; verify footprint compatibility. Ensure the 0.5% tolerance meets circuit accuracy needs compared to lower-cost standard grades.

Part Context

This part belongs to the TL431 series of adjustable precision shunt regulators. It serves as a stable voltage reference and control element in power management systems. The 'Q' suffix indicates automotive qualification, while 'MFDT' denotes the specific SOT-23 package with mirrored pinning.

Replacement Considerations

TL431BFDT offers similar electrical characteristics but lacks automotive qualification. TL431BIDBZR provides equivalent performance in a different package type. Verify pinout compatibility due to the mirrored configuration unique to the MFDT series.