TL431BCLP

Overview

The TL431BCLP is a precision programmable shunt voltage regulator manufactured by Microsemi Corporation. It features an initial voltage reference accuracy of 0.4% and operates within a temperature range of 0°C to 70°C. The device provides an adjustable output voltage from 2.5V to 36V using two external resistors. It supports a sink current capability ranging from 1mA to 100mA with a typical dynamic impedance below 200mΩ. Packaged in a plastic TO-92 three-terminal case, it serves as a direct pin-to-pin replacement for industry standard TL431 devices.

Feature Summary

• Offers high initial voltage reference accuracy of 0.4% at 25°C
• Provides low output noise and dynamic impedance for improved load regulation
• Features adjustable output voltage programmable via two external resistors
• Delivers stable performance across the commercial operating temperature range

Applications

• Feedback path control in switching power supplies
• Overvoltage protection (OVP) crowbar circuits
• Reference source for analog-to-digital and digital-to-analog converters
• Zener diode replacement with improved turn-on characteristics

Procurement Notes

Verify component authenticity through authorized Microsemi channels or certified distributors. Confirm package integrity upon receipt, as the TO-92 form factor requires careful handling during inspection. Ensure compliance with RoHS standards if required by your manufacturing process. Review the official datasheet for absolute maximum ratings to prevent operational damage during integration.

Selection Notes

Select this component when precise voltage referencing is critical within commercial temperature limits. The 0.4% tolerance suits applications requiring tight regulation without complex trimming. Consider the TO-92 package for through-hole mounting requirements. Evaluate thermal resistance parameters against your board's heat dissipation capabilities to ensure junction temperatures remain within safe operating limits.

Part Context

This device belongs to the TL431 series of precision programmable references. It maintains pin compatibility with legacy industry standards while offering enhanced accuracy. The Microsemi Integrated Products Division designs these components for robust performance in power management systems. The series includes variants with different tolerances and temperature grades to suit diverse electronic design needs.

Replacement Considerations

Direct pin-to-pin replacements include the TL431 and TL1431. Verify that substitute components match the 0.4% initial accuracy and TO-92 package specifications. Ensure the alternative part supports the same 1mA to 100mA sink current range and 2.5V to 36V output voltage span.