TL431QDBZTG4

Overview

The TL431QDBZTG4 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 output current of 100mA. The device features an initial accuracy of 2% and a maximum temperature coefficient of 92ppm/°C. It is housed in a surface-mount SOT-23 package with three pins and supplied in tape and reel format. The component is designed for robust performance across a wide operating temperature range from -40°C to 125°C, ensuring reliability in demanding automotive environments.

Feature Summary

• Automotive-grade qualification ensures reliability in vehicle electronic systems
• Adjustable reference voltage allows flexible circuit design integration
• Precision shunt regulation maintains stable output under varying conditions

Applications

• Automotive power supply regulation circuits
• Voltage reference sources for automotive sensors
• Feedback control loops in automotive DC-DC converters

Procurement Notes

Verify the complete part number including the G4 suffix to confirm lead-free compliance and specific automotive grade designation. Ensure the ordering code matches the required tolerance and temperature range specifications. Confirm the packaging type corresponds to the production requirements. Cross-reference the manufacturer's latest documentation for any updates on RoHS status or environmental compliance declarations before finalizing procurement orders.

Selection Notes

Select this component when automotive qualification is mandatory for the application. The 2% initial accuracy suits general regulation tasks where tighter tolerances are unnecessary. The SOT-23 package offers space efficiency for compact automotive modules. Consider the 100mA current limit when designing load requirements. Verify that the -40°C to 125°C temperature range aligns with the specific environmental conditions of the target installation site.

Part Context

This device belongs to the TL431 family of adjustable shunt regulators, widely used as voltage references and error amplifiers. The QDBZTG4 variant specifically targets automotive markets, distinguishing itself through enhanced thermal stability and qualification standards compared to commercial grades. It serves as a critical component for maintaining voltage integrity in safety-critical and non-safety-critical automotive electronics alike.

Replacement Considerations

Direct substitutes include other automotive-grade TL431 variants such as TL431AQDBZTG4 or TL431BQDBZTG4, which offer different accuracy levels. Ensure pinout compatibility and package dimensions match exactly. Verify that alternative parts meet the same AEC-Q100 automotive reliability standards and temperature specifications.