TL431LIBCDBZR

Overview

The TL431LIBCDBZR is an adjustable precision shunt voltage reference manufactured by Texas Instruments. It operates within a cathode voltage range of 2.495V to 36V and delivers a maximum shunt current of 15mA. The device features an initial accuracy of ±0.5% and a temperature coefficient of 63ppm/°C. It supports a maximum input voltage of 36V and functions across an extended temperature range from -40°C to +125°C. The component is housed in a surface-mount SOT-23-3 package.

Feature Summary

• Provides adjustable voltage referencing with high precision for stable circuit operation
• Features low temperature coefficient for consistent performance across wide thermal ranges
• Designed as a compact surface-mount shunt regulator for space-constrained applications

Applications

• Precision power supply regulation circuits
• Programmable zener diode implementations
• Voltage monitoring and threshold detection systems
• Battery management system references

Procurement Notes

Verify the specific suffix CDBZR against the official Texas Instruments datasheet to confirm the exact reel packaging configuration and marking codes. Ensure the procurement channel provides traceability documentation matching the manufacturer's part identification standards. Cross-reference the AEC-Q100 qualification status if automotive compliance is required, as standard commercial variants may differ in reliability specifications.

Selection Notes

Select this component when an adjustable reference with ±0.5% initial accuracy and a 63ppm/°C temperature coefficient is required. The 15mA shunt current limit suits low-power feedback loops rather than high-current load driving. The SOT-23-3 package offers a small footprint suitable for dense PCB layouts. Consider the -40°C to +125°C operating range for industrial or automotive environments where standard commercial grades are insufficient.

Part Context

This device belongs to the TL431LI series, representing a linear improvement over the standard TL431 family with enhanced accuracy and lower temperature drift. It serves as a direct replacement for fixed voltage references in many designs, offering flexibility through external resistor networks. The LI designation indicates optimized performance characteristics for precision analog applications requiring stable voltage thresholds.

Replacement Considerations

Compatible substitutes include TL431ACDBZRQ1 and ATL431LIBIDBZR. Verify pinout compatibility and electrical parameter alignment before substitution. Ensure the alternative part meets the same temperature coefficient and accuracy requirements for the specific application.