TLV431AQFTA

Overview

The TLV431AQFTA is an automotive-compliant, three-terminal adjustable shunt regulator manufactured by Diodes Incorporated. It provides a reference voltage of 1.24V with an initial tolerance of 1%. The device supports an adjustable output voltage range from 1.24V to 18V and handles a maximum cathode current of 15mA. It operates within a temperature range of -40°C to +125°C and meets AEC-Q100 Grade 1 standards. Packaged in a surface-mount SOT-23 format, it offers excellent temperature stability and low dynamic output impedance.

Feature Summary

• AEC-Q100 qualified for automotive applications with PPAP capability
• Adjustable output voltage set via external resistors up to 18V
• Low voltage operation with a 1.24V internal reference
• High temperature stability across the full operating range

Applications

• Replacing Zener diodes for improved performance
• Isolated feedback loops in Switch Mode Power Supplies (SMPS)
• Precision constant current sinks
• Increasing output voltage of fixed linear regulators

Procurement Notes

Verify that the component matches the specific automotive grade requirements for your application. Confirm the package type is SOT-23 and the tolerance band is 1% as indicated by the 'A' suffix. Ensure compliance with RoHS and halogen-free specifications if required by your manufacturing process. Check for valid PPAP documentation availability through authorized channels.

Selection Notes

Select this part when an adjustable shunt regulator with automotive qualification is needed. The 1% tolerance suits general precision applications. Consider the 15mA current limit for load requirements. Verify that the SOT-23 package fits the PCB layout constraints. Compare against other TLV431Q variants if tighter tolerances or different packages are necessary.

Part Context

This component belongs to the TLV431Q family of adjustable shunt regulators designed for automotive environments. It serves as a high-performance alternative to standard Zener diodes. The family includes variants with different tolerances and packages, all sharing the core 1.24V reference architecture and automotive reliability standards.

Replacement Considerations

TLV431BQFTA (0.5% tolerance) and TLV431TQFTA (0.2% tolerance) offer higher accuracy but may have different cost implications.