TL431AILPRAG

Overview

The TL431AILPRAG is a three-terminal programmable shunt regulator diode manufactured by onsemi. It operates as a low temperature coefficient zener, providing a reference voltage of 2.495 V at 25 °C with a tolerance of ±1%. The device allows for programmable output voltages ranging from the reference level up to 36 V using two external resistors. It supports a cathode current range of 1.0 mA to 100 mA and features a typical dynamic impedance of 0.22 Ω. The unit is housed in a TO-92 (TO-226) package with bent leads and functions within an ambient temperature range of -40 °C to +85 °C.

Feature Summary

• Programmable precision reference functionality utilizing internal bandgap architecture
• Temperature compensated operation across the full rated industrial temperature range
• Low dynamic output impedance ensuring stable regulation under varying load conditions
• Capable of serving as both positive and negative voltage reference sources

Applications

• Feedback control loops driving optocouplers in switching power supplies
• Precision digital voltmeter reference circuits
• Operational amplifier biasing and circuitry
• Series pass regulators and constant current sinks

Procurement Notes

Verify component authenticity through authorized distribution channels. Confirm that the specific ordering suffix matches the required tape and reel packaging specifications. Ensure compliance with RoHS directives and material declarations prior to integration into final assemblies.

Selection Notes

Select this component when a stable, adjustable reference voltage is required within the 2.5 V to 36 V range. Consider the ±1% initial accuracy and 50 ppm/°C temperature coefficient for precision applications. Evaluate stability boundary conditions regarding load capacitance and cathode current to ensure loop stability in feedback configurations.

Part Context

This device belongs to the TL431 family of programmable shunt regulators. It serves as a direct replacement for standard Zener diodes in applications demanding higher precision and lower temperature drift. The TO-92 package variant offers a cost-effective solution for through-hole mounting in consumer and industrial electronics.

Replacement Considerations

TL431AILPM