TL431CP

Overview

The onsemi TL431CP is a three-terminal programmable shunt regulator diode operating as a low temperature coefficient zener. It provides an adjustable output voltage from Vref to 36 V using two external resistors. The device supports a cathode current range of 1.0 mA to 100 mA with a typical dynamic impedance of 0.22 Ω. It features a reference input voltage tolerance of ±2.2% and operates within an ambient temperature range of 0°C to +70°C.

Feature Summary

• Programmable output voltage capability up to 36 V
• Temperature compensated for full rated operating range
• Low dynamic output impedance
• Wide sink current capability

Applications

• Digital voltmeters
• Power supplies
• Op amp circuitry
• Shunt regulators

Procurement Notes

Verify the specific suffix 'CP' corresponds to the PDIP-8 package and commercial temperature grade (0°C to +70°C) in the official ordering information table. Confirm that the device code matches the standard marking diagram for this series. Ensure compliance requirements align with project specifications, noting that Pb-Free variants may carry a 'G' suffix.

Selection Notes

Select the TL431CP when a commercial-grade, through-hole packaged precision reference is required. This variant offers a ±2.2% initial accuracy suitable for general-purpose applications. Designers must account for stability boundaries regarding load capacitance and cathode current to ensure loop stability in feedback configurations.

Part Context

This component belongs to the TL431, A, B Series and NCV431A, B family of programmable precision references manufactured by onsemi. These monolithic ICs serve as direct replacements for Zener diodes in various analog circuits. The CP designation specifically identifies the PDIP-8 plastic package configuration within this extensive product line.

Replacement Considerations

Compatible substitutes include TL431ACD, TL431BCD, and TL431CD from onsemi, which share identical electrical characteristics but differ in package type or tolerance grades.