TL431CLPR

Overview

The TL431CLPR is a three-terminal adjustable shunt regulator from Texas Instruments, housed in a TO-92 package. It provides an adjustable output voltage ranging from 2.5 V to 36 V using two external resistors. The device features a typical dynamic impedance of 0.2 Ω and supports cathode currents between 1 mA and 100 mA. It operates within a temperature range of 0°C to 70°C with an initial accuracy of ±2% at 25°C.

Feature Summary

• Adjustable output voltage capability spanning from the internal reference level up to 36 V via external resistor networks.
• Low dynamic output impedance characteristic enabling stable regulation performance under varying load conditions.
• Integrated active output circuitry providing defined turn-on characteristics suitable for replacing Zener diodes.

Applications

• Board-level voltage regulation circuits
• Adjustable power supply designs
• Switching power supply feedback loops

Procurement Notes

Verify the specific suffix CLPR against the official datasheet to confirm the TO-92 through-hole package and commercial temperature grade. Ensure compatibility with the required operating environment and thermal constraints before integration into the final design.

Selection Notes

Select this component when a low-cost, through-hole adjustable reference is needed for commercial applications. Consider higher precision grades or wider temperature ranges if the application demands tighter tolerances or operation outside the standard commercial limits.

Part Context

This part belongs to the TL431 family of programmable shunt regulators widely used in power management. It serves as a precise voltage reference and control element in linear and switching topologies, offering a robust alternative to discrete Zener diode solutions.

Replacement Considerations

Check for EOL status notifications. Verify pinout compatibility with existing PCB layouts. Confirm that alternative packages meet the same electrical specifications and thermal requirements.