TL431LIBEDBZRQ1

Overview

The TL431LIBEDBZRQ1 is an automotive-grade adjustable precision shunt regulator manufactured by Texas Instruments. It operates within a voltage range of 2.495V to 36V and features an initial accuracy of 1% at 25°C. The device supports a maximum cathode current of 15mA and maintains stability across a temperature range of -40°C to +150°C. Packaged in a compact SOT-23-3 surface-mount format, it offers a typical output impedance of 0.2Ω and a temperature coefficient of 63ppm/°C, ensuring reliable performance in demanding electronic environments.

Feature Summary

• Automotive qualification compliant with AEC-Q100 standards for enhanced reliability
• High thermal stability with extended operating temperature range up to 150°C
• Precision voltage reference with 1% initial accuracy for tight regulation
• Low output impedance enabling sharp turn-on characteristics

Applications

• Traction inverter designs requiring robust voltage supervision
• Secondary side regulation in isolated switch-mode power supplies
• Voltage monitoring circuits in automotive control modules
• Comparator applications utilizing integrated precision references

Procurement Notes

Verify the specific suffix 'LI' indicates the 1% accuracy grade and 'EDBZ' denotes the SOT-23-3 package variant. Confirm that the 'Q1' suffix aligns with required automotive reliability standards for your specific application environment. Ensure compatibility with existing PCB footprints for the three-terminal surface-mount configuration before finalizing procurement orders.

Selection Notes

Select this component when high-temperature operation up to 150°C is required, distinguishing it from standard commercial variants limited to lower temperatures. The 1% accuracy grade provides tighter tolerance than standard parts, suitable for precision feedback loops. Consider the 15mA current limit against load requirements, as higher current applications may necessitate alternative packages or devices within the family.

Part Context

This part belongs to the TL431LI-Q1 series, representing the automotive extension of the widely used TL431 adjustable shunt regulator family. It shares functional similarities with other TL431 variants but is specifically optimized for automotive durability and extended thermal ranges. The LI designation specifies the accuracy class, while the Q1 suffix confirms its compliance with automotive quality management systems.

Replacement Considerations

• TL431LIAEDBZRQ1
• TL431LIBEDBZRG4

FAQ

What is the maximum operating temperature for the TL431LIBEDBZRQ1?

The device is rated for a maximum operating temperature of +150°C, making it suitable for high-thermal environments.

Does this component support shutdown functionality?

No, the TL431LIBEDBZRQ1 does not include a shutdown pin or feature; it operates continuously once powered.