TL431ACDRE4

Overview

The TL431ACDRE4 is a programmable shunt voltage reference from Texas Instruments, housed in an 8-SOIC surface-mount package. It provides an adjustable output voltage ranging from 2.495 V to 36 V with an initial accuracy of ±1%. The device supports a maximum cathode current of 100 mA and operates within a temperature range of 0°C to 70°C. It features a low dynamic impedance of 0.22 ohms and a typical temperature coefficient of 92 ppm/°C. The component is RoHS compliant and designed for general commercial applications requiring precise voltage regulation.

Feature Summary

• Provides stable, adjustable reference voltage across a wide output range
• Low dynamic impedance ensures high stability during transient load changes
• Integrated bandgap reference architecture for reliable thermal performance

Applications

• Precision voltage regulation in power supply circuits
• Voltage monitoring and threshold detection systems
• Programmable linear regulators and battery chargers

Procurement Notes

Verify the specific suffix 'E4' indicates environmental compliance and reel packaging configuration as per Texas Instruments documentation. Confirm that the SOIC-8 package matches the target PCB footprint and soldering profile requirements. Ensure the ±1% tolerance meets the system's precision specifications before finalizing procurement.

Selection Notes

Select this component when a surface-mount solution with ±1% accuracy is required for commercial temperature ranges. It serves as a direct replacement for legacy TO-92 versions in space-constrained designs. Consider the 100 mA current limit for load requirements and verify compatibility with the intended control loop topology.

Part Context

The TL431 series represents a widely adopted family of programmable shunt regulators known for their versatility and cost-effectiveness. The TL431ACDRE4 variant specifically adapts this functionality into a modern surface-mount format, facilitating automated assembly processes while maintaining the electrical characteristics established by earlier through-hole iterations.

Replacement Considerations

Direct pin-compatible alternatives include the TL431ACDR and TL431ACD. Verify that substitute parts maintain the same ±1% initial accuracy and SOIC-8 package dimensions to ensure seamless integration without PCB redesign.