TL431BIDRE4

Overview

The TL431BIDRE4 is an adjustable precision shunt regulator manufactured by Texas Instruments. It operates within a voltage range of 2.5 V to 36 V and features an initial accuracy of ±0.5%. The device supports a maximum cathode current of 100 mA and has a minimum operating current of 700 µA. It utilizes an SOIC-8 surface-mount package with six pins. The operational temperature range spans from -40 °C to +125 °C, ensuring reliability in demanding environments.

Feature Summary

• Provides high-precision voltage reference with ±0.5% initial accuracy for stable regulation.
• Supports wide input voltage operation up to 36 V for versatile power management applications.
• Features low minimum cathode current requirement of 700 µA for efficient standby performance.

Applications

• Precision voltage references in power supply circuits
• On-line monitoring systems requiring accurate threshold detection
• Programmable output regulators for DC-DC converters

Procurement Notes

Verify the specific suffix 'E4' indicates lead-free compliance and RoHS standards when sourcing. Confirm the SOIC-8 package dimensions match PCB footprint requirements. Check current production status as some variants may be subject to obsolescence notices. Ensure thermal management aligns with the +125 °C maximum junction temperature limit during design integration.

Selection Notes

Select this component when precise voltage referencing is critical within a 2.5 V to 36 V range. The ±0.5% accuracy suits applications demanding tight tolerance without external trimming. Consider the SOIC-8 package for automated surface-mount assembly processes. Evaluate the 100 mA current capability against load requirements to ensure adequate headroom for transient responses.

Part Context

This part belongs to the TL431 family of adjustable shunt regulators, widely used as voltage references and error amplifiers. The TL431 series offers a cost-effective solution for replacing zener diodes in feedback loops. The 'B' designation typically denotes improved accuracy specifications compared to standard grades. The 'I' suffix often indicates industrial temperature range qualification.

Replacement Considerations

Direct substitutes include TL431BIDR and TL431BIDRG4. Cross-manufacturer equivalents such as AS431BKTR-G1 or TL431BW5-7 are available but require verification of pinout compatibility and electrical parameter alignment before implementation.