TL431AIDBZT

Overview

The TL431AIDBZT is a precision programmable shunt regulator from Texas Instruments, housed in a compact SOT-23 surface-mount package. It operates with an adjustable output voltage range spanning from 2.495 V to 36 V. The device features an initial accuracy of ±1% and supports a maximum cathode current of 100 mA. It functions within a temperature range of -40°C to +85°C and exhibits a temperature coefficient of 92 ppm/°C. The component utilizes a three-terminal topology with cathode, anode, and reference pins.

Feature Summary

• Provides stable, adjustable reference voltage for power supply regulation
• Enables precise error amplification in feedback loops
• Offers high thermal stability across industrial operating ranges

Applications

• Switching power supply output regulation
• Portable equipment power management circuits
• Internal voltage reference sources for analog-to-digital converters

Procurement Notes

Verify the specific suffix DBZT confirms the SOT-23-3 package configuration and tape-and-reel packaging format. Ensure the 'A' grade designation matches the required ±1% initial accuracy specification for your design. Confirm RoHS compliance status aligns with environmental regulations applicable to your manufacturing region before finalizing procurement orders.

Selection Notes

Select this component when a low-profile surface-mount solution is required for precision voltage referencing. The SOT-23 package suits space-constrained designs compared to larger through-hole alternatives. Consider the ±1% tolerance if tighter initial accuracy is not critical, as other grades may offer different specifications. Evaluate the 100 mA current capability against load requirements to ensure adequate headroom for shunt operation.

Part Context

This part belongs to the widely adopted TL431 family of programmable shunt regulators. It serves as a versatile alternative to Zener diodes, offering superior temperature stability and lower dynamic impedance. The device integrates an internal 2.5 V bandgap reference with an error amplifier, enabling flexible voltage setting via external resistors while maintaining high precision.

Replacement Considerations

Compatible substitutes include the TL431AIDBZR and TL431AQDBZT. Verify pinout compatibility and package dimensions before substitution. Check if automotive qualification (AQ) or extended temperature ranges are necessary for your specific application environment.