TL431AILPG

Overview

The TL431AILPG is a three-terminal programmable shunt regulator diode from onsemi, operating within the TL431A series. It functions as a low temperature coefficient zener reference, adjustable 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 voltage reference tolerance of ±1% at 25 °C and an equivalent full-range temperature coefficient of 50 ppm/°C. Designed for operation over an ambient temperature range of -40 °C to +85 °C, it utilizes a TO-92 (TO-226) package.

Feature Summary

• Programmable output voltage capability up to 36 V
• Low dynamic output impedance for stable regulation
• Temperature compensated operation across the rated range
• Lead-free and halogen-free construction compliant with RoHS standards

Applications

• Digital voltmeters
• Power supplies
• Op amp circuitry

Procurement Notes

Verify the specific suffix 'LP' corresponds to the TO-92 bent lead package variant when sourcing. Confirm that the component meets the required environmental specifications for your application, as standard versions differ from automotive qualified prefixes like NCV or SCV. Ensure compatibility with the intended operating temperature range of -40 °C to +85 °C before finalizing procurement decisions.

Selection Notes

Select this component when a precise, adjustable voltage reference is needed in a compact through-hole form factor. The ±1% initial accuracy makes it suitable for applications requiring tighter tolerances than standard Zener diodes. Consider the thermal resistance characteristics if high power dissipation is expected, and ensure the circuit design maintains stability within the specified cathode current limits.

Part Context

This part belongs to the TL431 family of programmable precision references manufactured by onsemi. The 'A' designation indicates a specific accuracy grade compared to other series members. The LP suffix identifies the physical packaging style, distinguishing it from surface mount options like SOIC-8 or PDIP-8 variants found within the same product line.

Replacement Considerations

Direct substitutes include parts from other manufacturers offering similar shunt regulator functionality, such as the LM431BIZX. Verify pinout compatibility and electrical parameter alignment, particularly regarding reference voltage tolerance and maximum operating currents, before implementing any cross-brand replacements.