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Product Detailed Parameters
- Description：IC VREF SHUNT ADJ 1% SOT23-3
- Series：-
- Mfr：Texas Instruments
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Type：Adjustable
- Voltage - Output (Min/Fixed)：2.495V
- Voltage - Output (Max)：36 V
- Current - Output：15 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：SOT-23-3
- Grade：Automotive
- Qualification：AEC-Q100
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Overview
The TL431LIAQDBZRQ1 is an automotive-grade programmable shunt regulator from Texas Instruments, designed for high-bandwidth and low-quiescent current applications. It operates within a cathode voltage range of 2.5 V to 36 V and offers an initial accuracy of 1%. The device features a temperature coefficient of 66 PPM/°C and supports a maximum cathode current of 15 mA. It functions reliably across an extended temperature range from -40°C to +125°C. Packaged in a compact SOT-23-3 surface-mount case, this component meets AEC-Q100 standards for automotive reliability.
Feature Summary
- Automotive qualification compliant with AEC-Q100 standards for robust performance in vehicle environments
- Optimized reference current architecture enabling low quiescent current consumption
- High bandwidth capability suitable for demanding feedback loop requirements
- Adjustable output voltage configuration via external resistor network
Applications
- Automotive power supply regulation circuits
- Battery management system monitoring
- Precision voltage reference generation in harsh environments
- Linear regulator error amplification stages
Procurement Notes
Verify the complete part number including suffixes to ensure correct automotive grade and package variant. Confirm AEC-Q100 compliance requirements match your specific application standards. Check for recent production change notices regarding marking or assembly site updates. Ensure ESD handling procedures are followed during installation due to the small form factor.
Selection Notes
Select this component when automotive reliability and low standby current are critical design constraints. Compare against standard industrial grades if cost sensitivity outweighs automotive certification needs. Consider the 15 mA cathode current limit for load driving capabilities. Evaluate thermal performance within the SOT-23-3 package for your specific power dissipation requirements.
Part Context
This device belongs to the TL431LI-Q1 family of programmable shunt regulators. It shares functional similarities with the ATL431LI-Q1 but differs in bandwidth and current specifications. The Q1 suffix denotes automotive qualification, distinguishing it from commercial variants like the TL431LIBQDBZR. It serves as a foundational reference element in Texas Instruments' power management portfolio for automotive electronics.
Replacement Considerations
Direct substitutes include ATL431LIAQDBZRQ1 for higher bandwidth needs. Industrial equivalents such as TL431BQDBZRQ1 offer different accuracy and current characteristics. Verify pinout compatibility and electrical limits before swapping components in existing designs.
