TL431BIDBZRG4

Overview

The TL431BIDBZRG4 is an adjustable precision shunt regulator from Texas Instruments, housed in a SOT-23 surface-mount package. It features a reference voltage tolerance of 0.5% and operates within a temperature range of -40°C to +125°C. The device supports an output voltage range from 2.495V to 36V, with a maximum cathode current of 100mA and a maximum input voltage of 37V.

Feature Summary

• Provides programmable output voltage capability up to 36V via external resistors
• Delivers high initial accuracy with a 0.5% reference voltage tolerance
• Maintains thermal stability across extended industrial temperature ranges

Applications

• Precision constant current sinks
• Isolated feedback loops for switch mode power supplies
• Board-level voltage regulation

Procurement Notes

Verify the specific suffix 'RG4' against official Texas Instruments documentation to confirm RoHS compliance and lead-free status. Ensure the ordering part number matches the exact temperature grade and package variant required for your design specifications before finalizing procurement.

Selection Notes

Select this component when a 0.5% accuracy shunt regulator is required for automotive or industrial applications. It serves as a direct replacement for standard TL431 variants where tighter tolerance and wider operating temperature are necessary compared to commercial grade options.

Part Context

This device belongs to the TL431 family of three-terminal adjustable shunt regulators. It is designed to replace Zener diodes in many applications, offering superior performance in terms of output impedance and temperature stability while maintaining a compact footprint suitable for space-constrained designs.

Replacement Considerations

Compatible substitutes include TL431BIDBZR and TL431BCDBZTG4. Verify pinout compatibility and electrical parameter alignment with the original design requirements before substitution.