TL431CPWE4

Overview

The TL431CPWE4 is an adjustable precision shunt regulator manufactured by Texas Instruments. It operates within a reference voltage range of 2.495V to 36V and features an initial accuracy of ±2%. The device supports a maximum output current of 100mA and has a maximum input voltage rating of 37V. It utilizes a SOIC-8 surface-mount package with a temperature coefficient of 92 ppm/°C. The operational temperature range spans from -40°C to +85°C, ensuring reliable performance in standard industrial environments.

Feature Summary

• Provides programmable output voltage capability across a wide range up to 36V
• Delivers low dynamic output impedance for stable regulation
• Offers high current trapping capability suitable for feedback loop control

Applications

• Precision voltage references in power supply circuits
• Programmable zener diode applications
• Error amplifier implementations in switching regulators

Procurement Notes

Verify the specific suffix 'E4' indicates lead-free compliance and RoHS status as per official datasheets. Confirm the SOIC-8 package dimensions and thermal characteristics match the target PCB layout requirements. Ensure the ±2% accuracy specification meets the circuit tolerance needs. Check for any obsolescence notices or lifecycle status updates directly from Texas Instruments documentation before finalizing procurement plans.

Selection Notes

Select this component when a cost-effective, widely available adjustable reference is required for general-purpose power management. The SOIC-8 package facilitates automated surface-mount assembly. Consider the ±2% initial accuracy and 92 ppm/°C temperature coefficient against stricter precision alternatives if higher stability is needed. Verify that the 100mA cathode current limit suffices for the intended load conditions.

Part Context

This part belongs to the TL431 family of programmable precision shunt regulators. These devices function similarly to a temperature-compensated Zener diode but offer adjustable output voltages. The family is extensively used in analog and mixed-signal circuits requiring stable reference points or active feedback elements.

Replacement Considerations

Compatible substitutes include TL431AIDR, TL431BIDR, and TL431ACDR from Texas Instruments. Cross-manufacturer equivalents such as ON Semiconductor's NCV431 series may also be considered, provided pinout compatibility and electrical specifications align.