TL431QD

Overview

The TL431QD is an automotive-grade adjustable precision shunt regulator manufactured by Texas Instruments. It operates within a voltage range of 2.495V to 36V and supports a maximum cathode current of 100mA. The device features an initial accuracy of 2% and a temperature coefficient of 92ppm/°C. Designed for robust performance, it functions across an extended temperature range from -40°C to +125°C. The component is housed in an SOIC-8 surface-mount package, ensuring compatibility with standard PCB layouts while maintaining high reliability for demanding electronic applications.

Feature Summary

• Automotive-grade qualification for enhanced reliability
• Adjustable output voltage capability
• Extended industrial temperature operation

Applications

• Automotive power supply regulation
• Precision voltage reference circuits
• Switching power supply feedback loops

Procurement Notes

Verify the specific suffix 'Q' confirms automotive grade status against official documentation. Confirm the SOIC-8 package variant matches design requirements. Ensure RoHS compliance aligns with project specifications. Validate operating temperature ranges for target environments. Cross-reference datasheet revisions for any parameter updates.

Selection Notes

Select this component when automotive reliability standards are mandatory. The adjustable nature allows flexible voltage setting via external resistors. Consider the 100mA current limit for load requirements. The wide input voltage range suits various supply rails. Verify thermal management needs for the SOIC-8 package.

Part Context

Part of the TL431 family of programmable shunt regulators. The 'Q' designation indicates automotive qualification per AEC standards. This series provides a cost-effective solution for voltage referencing and regulation. It serves as a direct replacement for legacy discrete Zener diode references in many designs.

Replacement Considerations

TL431QDR is a reel-packaged equivalent within the same automotive grade series.