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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 Nexperia TL431FDT-QR is a three-terminal shunt regulator belonging to the TL431 family, designed for precision voltage reference applications. It features an adjustable output voltage range from 2.495 V to 36 V, set by two external resistors. This specific variant offers a reference voltage tolerance of 2.0% and operates within an ambient temperature range of -40 °C to 125 °C. The device utilizes SOT-23 surface-mount packaging with normal pinning configuration. Key electrical characteristics include a typical temperature drift of 9 mV between 0 °C and 70 °C, low output noise, and a typical output impedance of 0.2 Ω. It supports a sink current capability ranging from 1 mA to 100 mA.
Feature Summary
- Programmable output voltage up to 36 V via external resistors
- AEC-Q101 qualified for automotive reliability standards
- Low output impedance and low output noise performance
Applications
- Shunt regulator circuits
- Precision current limiter designs
- Isolated feedback loops for Switch Mode Power Supplies (SMPS)
Procurement Notes
Verify the AEC-Q101 qualification status and specific package pinning configuration against the official datasheet before integration. Confirm that the -40 °C to 125 °C operating temperature range meets the thermal requirements of the target application environment. Ensure compatibility with the 2.0% reference voltage tolerance specification for the intended circuit precision needs.
Selection Notes
Select this component when a robust, automotive-grade shunt regulator is required with a wide operating temperature range. The 2.0% tolerance suits applications where extreme precision is not critical but cost-effectiveness and reliability are priorities. Compare with TL431BFDT or TL431BMFDT variants if tighter 0.5% tolerance is necessary, noting that those parts may have different temperature ranges or pricing structures.
Part Context
This part belongs to the Nexperia TL431 series of programmable zener diodes. The 'Q' suffix indicates AEC-Q101 qualification for automotive use, while 'FDT' denotes the SOT-23 surface-mount package with normal pinning. It serves as a direct replacement for standard TL431 devices in designs requiring enhanced reliability for automotive electronics.
Replacement Considerations
For equivalent performance with tighter tolerance, consider TL431BFDT-QR (0.5% tolerance) or TL431BIDBZR-QR. For mirrored pinning configurations in the same package, evaluate TL431MFDT-QR. Verify that the alternative part's temperature range and electrical specifications match the original design constraints.
