TL431FDT,215

Overview

The TL431FDT,215 is a three-terminal shunt adjustable precision reference manufactured by Nexperia USA Inc. It operates within an output voltage range of 2.495 V to 36 V, set via two external resistors. The device features a B-grade reference voltage tolerance of 0.5% and supports a maximum sink current of 100 mA with a minimum cathode current of 400 µA. It utilizes the SOT-23 (TO-236AB) surface-mount package with normal pinning configuration. The component is qualified to AEC-Q100 Grade 1 standards and functions reliably across an ambient temperature range of -40 °C to +125 °C.

Feature Summary

• Programmable output voltage capability up to 36 V using external resistors
• High initial accuracy with 0.5% reference voltage tolerance
• Automotive grade qualification compliant with AEC-Q100 standards
• Low output noise and typical output impedance of 0.2 Ω

Applications

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

Procurement Notes

Verify the specific suffix '215' corresponds to the standard tape-and-reel packaging format intended for automated assembly. Confirm that the normal pinning configuration aligns with the target PCB footprint, as mirrored variants exist within the family. Ensure the selected component meets the required thermal management specifications for the intended operating environment.

Selection Notes

Select this variant when a 0.5% accuracy level is required alongside automotive reliability certification. The SOT-23 package offers space efficiency for compact designs. Consider the mirrored pinning options if board layout constraints necessitate alternative terminal arrangements while maintaining electrical functionality.

Part Context

This component belongs to the TL431 series of programmable zener diodes, widely used as voltage references in power management applications. Nexperia provides multiple grades and packages within this family to address diverse industrial and automotive requirements. The FDT designation specifically indicates the SOT-23 surface-mount package with standard pinout orientation.

Replacement Considerations

Direct substitutes include TL431BFDT,215 and TL431BMFDT,215, which share identical electrical characteristics and 0.5% tolerance. Alternative packages such as TL431QDBZR offer the same performance in different form factors.