TL431AIPKG3

Overview

The TL431AIPKG3 is a precision adjustable shunt regulator manufactured by Texas Instruments, housed in an SOT-89-3 surface-mount package. It provides an adjustable output voltage range from 2.495 V to 36 V with an initial accuracy of ±1%. The device supports a maximum cathode current of 100 mA and requires a minimum operating cathode current of 700 µA for regulation. It operates within a temperature range of -40°C to +85°C and features a typical temperature coefficient of 92 ppm/°C. The component is RoHS compliant and classified as a voltage reference IC under PMIC categories.

Feature Summary

• Provides precise programmable reference voltage functionality via three-terminal shunt regulation topology
• Delivers stable performance across a wide adjustable output voltage range up to 36 V
• Designed for surface-mount integration with compact SOT-89-3 packaging

Applications

• Voltage reference sources in switching power supplies
• Precision voltage monitoring circuits
• Linear regulator feedback networks

Procurement Notes

Verify the specific suffix 'G3' against the manufacturer's latest documentation to confirm compliance with current environmental standards such as RoHS3. Confirm that the SOT-89-3 package designation matches the required footprint for the target PCB design. Check for any Product Change Notifications (PCN) regarding manufacturing site changes or marking updates that may affect long-term supply chain consistency.

Selection Notes

Select this component when a high-accuracy adjustable reference is required in a compact surface-mount form factor. Ensure the circuit design accommodates the minimum 700 µA cathode current requirement to maintain regulation stability. Verify that the thermal environment remains within the specified -40°C to +85°C operational range for reliable performance.

Part Context

This part belongs to the TL431B series of precision programmable references from Texas Instruments. It serves as a successor to earlier Zener diode solutions, offering superior voltage accuracy and sharper turn-on characteristics. The device is widely utilized in power management applications requiring stable reference voltages for feedback control loops.

Replacement Considerations

The TL431AIPK is listed as a manufacturer-recommended alternative. Other potential substitutes include the AS431ARTR-G1 from Diodes Incorporated.