TL431AIDBZTG4

Overview

The Texas Instruments TL431AIDBZTG4 is a precision programmable shunt voltage reference in a 3-pin SOT-23 surface-mount package. It features an adjustable output voltage range from 2.495V to 36V with an initial accuracy of ±1%. The device supports a maximum output current of 100mA and operates within a temperature range of -40°C to +85°C, exhibiting a maximum temperature coefficient of 92ppm/°C.

Feature Summary

• Provides stable, adjustable reference voltage for power supply regulation
• Delivers high precision with tight initial accuracy tolerance
• Features sharp turn-on characteristics compared to standard Zener diodes

Applications

• Power supply feedback loops
• Voltage monitoring circuits
• Comparator references

Procurement Notes

Verify the specific suffix 'G4' indicates lead-free compliance and tape-and-reel packaging configuration. Confirm that the 'A' designation corresponds to the ±1% accuracy grade rather than higher precision variants. Ensure the SOT-23-3 footprint matches the target PCB layout dimensions before finalizing procurement orders.

Selection Notes

Select this component when a compact, low-cost adjustable reference is required for general-purpose applications. It is suitable for designs needing ±1% accuracy without requiring automotive qualification. Consider alternative packages if higher thermal dissipation or different pin counts are necessary for the specific circuit topology.

Part Context

This part belongs to the widely adopted TL431 family, originally released in 1978 as an improvement over the TL430. It serves as a fundamental building block in analog electronics, offering superior stability and accuracy compared to traditional temperature-compensated Zener diodes while maintaining a small form factor.

Replacement Considerations

Compatible substitutes include the TL431AIDBZT and TL431AIDBVR. Verify that any replacement maintains the same SOT-23-3 package and ±1% accuracy specification to ensure electrical compatibility.