TLV431TFTA

Overview

The TLV431TFTA is a three-terminal adjustable shunt regulator manufactured by Diodes Incorporated. It provides an internal reference voltage of 1.24V with a tolerance of 0.2% at +25°C. The device supports an output voltage range from 1.24V to 18V, set via external resistors. It operates within a temperature range of -40°C to +125°C and handles cathode currents up to 15mA. The part is housed in an SOT-23 package.

Feature Summary

• Offers high initial accuracy with 0.2% reference voltage tolerance
• Provides excellent temperature stability across wide operating ranges
• Enables precise regulation through simple two-resistor divider configuration

Applications

• Secondary side regulation in isolated power supplies
• Replacing zener diodes for improved performance
• Increasing output voltage of fixed linear regulators

Procurement Notes

Verify the specific ordering suffix matches the required package type and tolerance grade. Confirm RoHS compliance status and ensure the component meets automotive or industrial qualification requirements if applicable to the design. Cross-reference datasheet revision numbers to guarantee electrical characteristic consistency during production.

Selection Notes

Select this variant when 0.2% initial accuracy is critical for the application. Ensure the circuit design accommodates the minimum cathode current requirement for stable regulation. Verify that the thermal dissipation capabilities of the SOT-23 package are sufficient for the expected operating conditions and load currents.

Part Context

This component belongs to the TLV431 family of low-voltage adjustable precision shunt regulators. It serves as a cost-effective alternative to traditional Zener diodes, offering superior temperature drift characteristics and lower dynamic output impedance. The T-grade designation specifically indicates the highest precision tier within the standard product line.

Replacement Considerations

Direct replacements include other manufacturers' TLV431 equivalents such as Texas Instruments TLV431 variants. Ensure pinout compatibility and verify that the substitute part meets the same 0.2% tolerance and SOT-23 package specifications.