TL431QDCKT

Overview

Texas Instruments TL431QDCKT is an automotive-grade adjustable shunt voltage reference IC housed in a compact SC-70-6 surface-mount package. It operates within a supply voltage range of 2.5V to 36V, delivering a maximum cathode current of 100mA. The device features an initial accuracy tolerance of ±2.2% and maintains stable performance across an extended industrial temperature range from -40°C to +125°C. Designed for high reliability in automotive environments, it supports precise voltage regulation with low dynamic impedance.

Feature Summary

• Automotive-grade qualification ensuring robust performance in demanding vehicle electronic applications
• Adjustable output voltage capability allowing flexible circuit design integration
• Compact SC-70-6 surface-mount footprint optimized for space-constrained PCB layouts

Applications

• Automotive power supply regulation circuits
• Precision voltage reference sources for data acquisition systems
• Feedback control loops in switching power converters

Procurement Notes

Verify the specific suffix 'Q' confirms automotive grade status against the official Texas Instruments datasheet. Ensure the SC-70-6 package dimensions match your board layout constraints. Confirm RoHS compliance requirements align with project specifications. Validate that the ±2.2% initial accuracy meets your system's precision thresholds before finalizing procurement decisions.

Selection Notes

Select this component when automotive reliability standards are mandatory for voltage reference applications. The SC-70-6 package offers a smaller footprint compared to traditional SOT-23 or TO-92 variants. Consider the ±2.2% tolerance if tighter precision is not required, as other series options may offer lower error margins. Ensure the 100mA current drive capacity suffices for the intended load conditions.

Part Context

The TL431QDCKT belongs to the broader TL431 family of programmable shunt regulators widely used in industrial and consumer electronics. The 'Q' designation specifically denotes automotive qualification, distinguishing it from standard commercial grades. This variant shares core electrical characteristics with non-automotive counterparts but undergoes stricter manufacturing controls to meet AEC-Q100 reliability standards for long-term automotive durability.

Replacement Considerations

Direct substitutes include TL431QDBZTG4 (SOT-23 package) and TL431QDCKR (tape and reel packaging). Verify pin compatibility and package dimensions when transitioning between these alternatives. Ensure the replacement maintains the same automotive grade certification and thermal performance characteristics.