TL431CLP

Overview

The TL431CLP is a precision programmable three-terminal shunt voltage regulator manufactured by Microsemi. It features an adjustable output voltage range from 2.5V to 36V, set via two external resistors. The device offers an initial voltage reference accuracy of 2% and operates within an ambient temperature range of 0°C to 70°C. Key electrical characteristics include a typical dynamic output impedance of less than 200mΩ and a sink current capability ranging from 1mA to 100mA. It serves as a direct pin-to-pin replacement for industry standard TL431 devices.

Feature Summary

• Precision adjustable three-terminal shunt voltage regulation
• Direct pin-to-pin compatibility with industry standard TL431
• Low output noise and low dynamic output impedance
• Temperature compensated operation over the full rated range

Applications

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

Procurement Notes

Verify component status before procurement as this specific part may be obsolete or not recommended for new designs. Confirm that the LP package designation corresponds to the Plastic TO-92 3-Pin configuration. Ensure the 2% tolerance grade meets system requirements. Check for RoHS compliance transition data codes if environmental standards are critical. Validate thermal resistance parameters against the specific PCB layout and airflow conditions.

Selection Notes

Select this component when a precise, adjustable shunt regulator is required for commercial temperature ranges. The 2% initial accuracy suits general-purpose applications where tighter tolerances are unnecessary. Consider the TO-92 package for through-hole mounting needs. Evaluate the 1mA to 100mA sink current range against load requirements. Verify stability boundary conditions regarding load capacitance to prevent oscillation in the final circuit design.

Part Context

This device belongs to the TL431 series of precision programmable references produced by Microsemi's Integrated Products Division. It shares functional equivalence with the TL431A and TL431B variants, differing primarily in initial voltage tolerance grades. The series is designed to replace standard Zener diodes, offering superior performance in terms of impedance and temperature stability across the specified operating range.

Replacement Considerations

The datasheet confirms direct pin-to-pin replacement for the industry standard TL431 and TL1431. No other specific substitute part numbers are documented in the provided source material.