TL431AILPRP

Overview

The TL431AILPRP is a three-terminal programmable shunt regulator diode from 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 programmable output voltages 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 component is housed in a TO-92 (TO-226) package and is rated for an operating ambient temperature range of -40°C to +85°C.

Feature Summary

• Programmable precision reference utilizing internal 2.5 V bandgap
• Low dynamic output impedance for stable regulation
• Temperature compensated across the full rated operating range

Applications

• Digital voltmeters
• Power supplies
• Op amp circuitry
• Feedback control for driving optocouplers
• Voltage monitors

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm the exact package type and shipping configuration. Confirm that the required tolerance level matches the application specifications. Ensure the operating temperature range requirements align with the device ratings before finalizing procurement decisions.

Selection Notes

Select this component when a precise, adjustable voltage reference is needed within a shunt regulator topology. Consider the thermal resistance characteristics if power dissipation limits are critical. Evaluate stability boundary conditions regarding load capacitance and cathode current to ensure loop stability in the target circuit design.

Part Context

This device belongs to the TL431 series of programmable precision references manufactured by onsemi. It serves as a monolithic IC replacement for traditional Zener diodes in various electronic applications. The series includes variants with different tolerances and extended temperature ranges, such as the NCV prefix for automotive applications requiring unique site and control change requirements.

Replacement Considerations

Direct replacements include other TL431 series devices with matching pinouts and electrical characteristics. Verify compatibility regarding package dimensions and lead configurations when substituting.