TL431ACDE4

Overview

The TL431ACDE4 is an adjustable precision shunt regulator manufactured by Texas Instruments. It operates within a cathode voltage range of 2.495 V to 36 V and supports a maximum cathode current of 100 mA. The device features an initial accuracy of ±1% and a maximum temperature coefficient of 92 ppm/°C. It functions with a minimum operating cathode current of 1 mA and withstands a maximum input voltage of 37 V. The component is housed in an SOIC-8 surface-mount package and is rated for operation between 0°C and 70°C.

Feature Summary

• Provides precise programmable reference voltage functionality via external resistor divider
• Operates as a low-cost alternative to Zener diodes with superior performance characteristics
• Features internal reference voltage source for stable regulation across the operating range

Applications

• Adjustable output power supplies
• On-line circuit breakers
• Programmable output circuits

Procurement Notes

Verify the specific suffix 'E4' indicates lead-free compliance and RoHS standards during sourcing. Confirm the SOIC-8 package dimensions match the target PCB footprint. Ensure the ±1% tolerance meets the design requirements for the intended application. Check for active status or obsolescence notices from the manufacturer before finalizing procurement plans.

Selection Notes

Select this component when a precise, adjustable voltage reference is required in a compact surface-mount format. The ±1% accuracy suits applications demanding tighter tolerances than standard Zener diodes. Consider the 100 mA current capability for driving loads directly or biasing other components. Verify thermal management needs within the specified 0°C to 70°C operating range.

Part Context

This part belongs to the TL431 family of adjustable precision shunt regulators. It serves as a fundamental building block in power management designs, offering high stability and low dynamic impedance. The device is widely used in industrial and consumer electronics for voltage regulation and reference purposes.

Replacement Considerations

Direct replacements include the TL431ACD. Verify pinout compatibility and electrical specifications such as accuracy and temperature coefficient when substituting.