TLV431AIDBZRG4

Overview

The TLV431AIDBZRG4 is a low-voltage, three-terminal adjustable voltage reference manufactured by Texas Instruments. It operates within an industrial and commercial temperature range with specified thermal stability. The output voltage is programmable between the internal reference of 1.24 V and 6 V using two external resistors. This device features a lower operating voltage compared to standard TL431 shunt regulators, making it suitable for 3 V to 3.3 V switch-mode power supplies. It provides an active output circuit with a typical output impedance of 0.25 Ω, enabling sharp turn-on characteristics.

Feature Summary

• Adjustable output voltage capability via external resistor divider
• Active output circuit providing sharp turn-on characteristics
• Low operating voltage suitable for low-voltage systems
• Specified thermal stability across industrial and commercial temperature ranges

Applications

• Isolated feedback circuits in 3 V to 3.3 V switch-mode power supplies
• Secondary side regulation in flyback SMPS
• Board-level voltage regulation
• Voltage monitoring systems
• Comparators with integrated references

Procurement Notes

Verify the specific suffix 'G4' indicates RoHS compliance and lead-free status as per Texas Instruments documentation. Confirm the package type matches SOT-23-3 requirements for your PCB layout. Ensure the operating voltage range aligns with your system's 3 V to 3.3 V design constraints. Cross-reference the datasheet revision date to ensure compatibility with current manufacturing standards.

Selection Notes

Select this component when a low-voltage precision reference is required for systems operating below standard 2.5 V or 5 V benchmarks. It serves as a direct replacement for TL431 in applications where lower minimum operating voltage is critical. Consider its 0.25 Ω output impedance for applications requiring fast transient response. Verify that the adjustable range up to 6 V meets your specific feedback network requirements.

Part Context

This part belongs to the TLV431A family of low-voltage adjustable shunt regulators. It is designed to replace traditional TL431 devices in modern low-voltage electronics. The 'DBZR' suffix denotes the SOT-23-3 surface-mount package, while 'G4' typically signifies environmental compliance. It is widely used in compact power management designs where space and low voltage operation are prioritized.

Replacement Considerations

Direct pin-compatible substitutes include the TLV431AIDBZR. For higher voltage applications, the TL431AIDBZR may be considered if the lower operating voltage of the TLV431 is not required. Always verify electrical parameters such as initial accuracy and temperature coefficient against the original design specifications before substitution.