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Product Detailed Parameters
- Description：IC VREF SHUNT 2.495V SOT23-3
- Series：-
- Mfr：Nexperia USA Inc.
- Package：Tape & Reel (TR)
- Output Type：Adjustable
- Voltage - Output (Min/Fixed)：2.495V
- Voltage - Output (Max)：36 V
- Current - Output：100 mA
- Operating Temperature：-40°C ~ 125°C (TA)
- Mounting Type：Surface Mount
- Package / Case：TO-236-3, SC-59, SOT-23-3
- Supplier Device Package：TO-236AB
- Grade：Automotive
- Qualification：AEC-Q100
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Overview
The TL431BFDT-QR is an automotive-grade, three-terminal shunt voltage reference manufactured by Nexperia. It operates within a cathode 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 sink current capability from 1 mA to 100 mA. It is qualified under the AEC-Q101 standard for Grade 1 applications and functions reliably across an ambient temperature range of -40 °C to +125 °C.
Feature Summary
- AEC-Q101 qualified for Grade 1 automotive reliability requirements
- Programmable output voltage adjustable up to 36 V using external resistors
- High precision with 0.5% initial accuracy on reference voltage
- Wide operating temperature range suitable for harsh automotive environments
Applications
- Isolated feedback loops in Switch Mode Power Supplies (SMPS)
- Precision constant current sinks
- Shunt regulators
- Precision current limiters
Procurement Notes
Verify component authenticity through authorized Nexperia distributors or certified partners. Confirm that the specific suffix indicates AEC-Q101 qualification rather than standard industrial grades. Ensure packaging integrity matches reel specifications. Validate datasheet revisions against current production status to avoid obsolete variants.
Selection Notes
Select this part when automotive reliability standards are mandatory. The mirrored pinning configuration requires careful PCB layout consideration compared to normal pinning variants. Verify that the 0.5% tolerance meets system accuracy requirements. Ensure the 100 mA sink current capacity aligns with the load demands of the feedback network.
Part Context
This component belongs to the TL431 family of programmable zener diodes. It serves as a direct replacement for legacy TL431 devices in automotive designs. The 'Q' suffix denotes automotive qualification, while 'FDT' indicates the SOT-23 package with mirrored pinning. It provides a cost-effective solution for precision voltage regulation in compact form factors.
Replacement Considerations
Compatible substitutes include TL431BMFDT-QR (mirrored pinning) and TL431BIDBZR-QR (normal pinning). Cross-referencing pin configurations is essential to prevent circuit malfunction during substitution.
