TL431ACDBZTG4

Overview

The TL431ACDBZTG4 is an adjustable precision shunt regulator from Texas Instruments, designed for automotive applications. It operates with a reference 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 maximum temperature coefficient of 92ppm/°C. It functions within a supply voltage range up to 37V and operates across a temperature spectrum from -40°C to 125°C. Packaged in a surface-mount SOT-23 format with three pins, it is supplied in tape and reel quantities.

Feature Summary

• Automotive-grade qualification ensuring reliability in vehicle environments
• Adjustable output voltage capability spanning 2.495V to 36V
• High precision shunt regulation with defined initial accuracy

Applications

• Automotive power supply regulation circuits
• Precision voltage reference sources
• Feedback control loops in switching regulators

Procurement Notes

Verify the specific suffix 'G4' against the manufacturer's official documentation to confirm automotive grade status and RoHS compliance details. Ensure the ordering part number matches the exact package type and tape-and-reel specifications required for your assembly process. Cross-reference the datasheet revision to confirm pinout and electrical characteristics align with your design requirements before finalizing procurement.

Selection Notes

Select this component when automotive environmental resilience is required alongside precise voltage regulation. The wide operating temperature range suits harsh under-hood conditions. Consider the 2% initial accuracy and thermal stability for applications demanding consistent performance without extensive calibration. Verify that the SOT-23 package dimensions fit within the available PCB real estate constraints.

Part Context

This device belongs to the TL431 family of programmable precision references, widely utilized in power management systems. It serves as a cost-effective alternative to Zener diodes, offering superior accuracy and lower dynamic impedance. The automotive variant ensures compatibility with stringent industry standards for vehicle electronics, providing stable reference voltages for critical control systems.

Replacement Considerations

Direct substitutes include TL431QDBZTG4 and TL431AQDBZTG4, which share similar automotive qualifications and package types. Verify that any replacement maintains the required 2% or better initial accuracy and operates within the specified -40°C to 125°C temperature range. Ensure the substitute part supports the same 100mA cathode current and 36V output voltage limits.