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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 TL431BQDBZR-QR is an automotive-grade programmable shunt voltage reference manufactured by Nexperia. It provides a precise reference voltage of 2.5 V with an initial tolerance of ±0.5%. The device operates within a temperature range of -40°C to +125°C and supports a sink current capability from 1 mA to 100 mA. It features a typical output impedance of 0.2 Ω and low output noise. The component is housed in a SOT-23 (TO-236AB) surface-mount package with three pins, designed for high reliability in demanding environments.
Feature Summary
- AEC-Q101 qualified for automotive applications
- Programmable output voltage up to 36 V via external resistors
- Low output noise and high precision stability
Applications
- Shunt regulator circuits
- Precision constant current sinks
- Isolated feedback loops for Switch Mode Power Supplies
Procurement Notes
Verify the specific suffix 'QR' against the official Nexperia datasheet to confirm it denotes the standard tape-and-reel packaging format rather than a unique electrical variant. Ensure the ordering part number matches the required AEC-Q101 Grade 1 qualification and B-grade (0.5%) tolerance specifications. Confirm that the SOT-23 package dimensions align with the target PCB footprint requirements before finalizing procurement.
Selection Notes
Select this component when designing for automotive systems requiring high thermal stability across the full industrial temperature range. The B-grade tolerance ensures tighter voltage accuracy compared to standard or A-grade alternatives. Consider the 100 mA sink current limit for load requirements and verify that the SOT-23 package size fits the available board space constraints.
Part Context
This part belongs to the TL431 family of three-terminal shunt regulators. The 'B' indicates a 0.5% reference voltage tolerance, while 'Q' signifies automotive qualification. The 'DBZR' suffix identifies the SOT-23 surface-mount package and reel packaging. This series serves as a cost-effective solution for voltage referencing and regulation in power management designs.
Replacement Considerations
Direct substitutes include TL431AQDBZR (1% tolerance) and TL431CQDBZR (2% tolerance). For non-automotive use, TL431ACDBZR and TL431BCDBZR are pin-compatible options. Verify that any replacement maintains the required operating temperature range and package outline.
