TL431MFDT,215

Overview

The TL431MFDT,215 is a three-terminal shunt adjustable precision voltage 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. This component features mirrored pinning configuration and offers a reference voltage tolerance of 1%. It supports a sink current capability from 1 mA to 100 mA with a typical output impedance of 0.2 Ω. The device functions across an ambient temperature range of -40 °C to 125 °C and is housed in a TO-236AB (SOT-23) surface-mount package.

Feature Summary

• Programmable output voltage up to 36 V using two external resistors
• Mirrored pinning configuration for flexible PCB layout
• Low output noise characteristics suitable for sensitive circuits
• High sink current capability ranging from 1 mA to 100 mA

Applications

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

Procurement Notes

Verify the specific suffix '215' corresponds to the reel packaging format required for automated assembly processes. Confirm that the mirrored pinning configuration aligns with the target footprint design, as it differs from standard pinning variants. Ensure the selected tolerance grade meets the circuit's accuracy requirements before finalizing procurement orders.

Selection Notes

Select this variant when a mirrored pinout is necessary for board routing optimization compared to standard pinning options. The 1% tolerance provides higher precision than standard grades while maintaining cost efficiency. Verify that the operating temperature range extends to 125 °C to ensure reliability in high-thermal environments where standard commercial grades might fail.

Part Context

This component belongs to the TL431 family of programmable zener diodes, widely used as voltage references in power management applications. The 'M' designation specifically indicates the mirrored pinning arrangement within the SOT-23 package, distinguishing it from standard pinning versions like the TL431AFDT. It serves as a direct replacement for legacy discrete transistor solutions requiring precise voltage regulation.

Replacement Considerations

Direct functional substitutes include TL431AMFDT,215 and TL431QDBZR,215. When replacing standard pinning variants, verify that the mirrored pin configuration does not conflict with existing PCB silkscreen or trace routing. Cross-reference datasheets to confirm identical electrical parameters such as sink current limits and temperature drift specifications.