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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 TL431AQDBZR-QR is a three-terminal shunt regulator from Nexperia, designed for precision voltage reference applications. It operates within an output voltage range of 2.495 V to 36 V, programmable via two external resistors. This specific variant features a reference voltage tolerance of 1% (A-Grade) and is qualified under the AEC-Q100 standard for Grade 1 automotive requirements. The device supports a sink current capability ranging from 1 mA to 100 mA and maintains a typical output impedance of 0.2 Ω. It is housed in a SOT-23 (TO-236AB) surface-mount package.
Feature Summary
- Programmable output voltage adjustable between 2.495 V and 36 V using external resistors
- Automotive-grade reliability with AEC-Q100 qualification for Grade 1 temperature ratings
- High precision performance with 1% reference voltage tolerance for stable regulation
Applications
- Isolated feedback loops for Switch Mode Power Supplies (SMPS)
- Precision constant current sinks
- Shunt regulators in power management circuits
Procurement Notes
Verify that the suffix -QR indicates the specific reel packaging configuration required for automated assembly processes. Confirm that the AEC-Q100 Grade 1 qualification aligns with your system's environmental operating specifications. Ensure the SOT-23 footprint matches your PCB design constraints. Cross-reference the manufacturer part number with official Nexperia documentation to confirm availability status and lead times before finalizing procurement plans.
Selection Notes
Select this component when a 1% reference voltage accuracy is required for automotive or high-reliability industrial applications. The AEC-Q100 Grade 1 qualification ensures suitability for environments with wider temperature variations compared to commercial grades. Choose this over standard grades if strict tolerance control is necessary for precision feedback networks in switching power supplies.
Part Context
This device belongs to the Nexperia TL431 family of three-terminal shunt regulators. The 'A' designation specifies the 1% reference voltage tolerance grade, distinguishing it from standard (2%) and B-grade (0.5%) variants. The 'Q' suffix typically denotes automotive qualification, while '-QR' identifies the tape-and-reel packaging format intended for high-volume surface-mount manufacturing.
Replacement Considerations
Compatible substitutes include TL431ACDBZR-QR and TL431BCDBZR-QR from Nexperia, which share the same package and electrical characteristics but differ in reference voltage tolerance. Other manufacturers offering pin-compatible shunt regulators may require verification of thermal and electrical parameters.
