TLV431BFTA

Overview

The TLV431BFTA is a three-terminal adjustable shunt regulator manufactured by Diodes Incorporated, housed in an SOT-23 package. It provides a reference voltage of 1.24 V with a tolerance of 0.5%. The device supports an output voltage range from 1.24 V to 18 V and operates within a temperature range of -40°C to +125°C. It features a typical output impedance of 0.25 Ω and requires a minimum cathode current of 80 µA for regulation.

Feature Summary

• Adjustable output voltage set via external resistors
• High initial accuracy with 0.5% tolerance
• Low operating current capability
• Excellent temperature stability

Applications

• Secondary side regulated supply
• Primary side controller feedback
• Replacing zener diodes for improved performance

Procurement Notes

Verify the specific ordering suffix 'F' corresponds to the tape and reel packaging configuration as defined in the manufacturer's ordering information. Confirm that the component meets RoHS compliance requirements and ensure the selected grade matches the required initial tolerance specifications for the intended circuit design.

Selection Notes

Select this component when precise voltage referencing is required in space-constrained designs utilizing surface mount technology. Ensure the application circuit provides sufficient bias current above the minimum threshold while staying within the maximum continuous cathode current limits to maintain stable regulation across the specified temperature range.

Part Context

This part belongs to the TLV431 family of low-voltage shunt regulators designed as cost-effective alternatives to traditional Zener diodes. The B-grade designation indicates a tighter initial voltage tolerance compared to standard grades, making it suitable for applications demanding higher precision without requiring complex trimming procedures or additional calibration steps.

Replacement Considerations

TLV431TFTA offers 0.2% tolerance in the same package.