TL431AIP

Overview

The TL431AIP is a three-terminal programmable shunt regulator diode manufactured by onsemi. It operates as a low temperature coefficient zener reference, with an output voltage programmable from Vref to 36 V using two external resistors. The device supports a cathode current range of 1.0 mA to 100 mA and features a typical dynamic impedance of 0.22 Ω. It provides a stable 2.5 V reference for logic supplies and functions as either a positive or negative voltage reference. The component is housed in a PDIP-8 package and is rated for an operating ambient temperature range of -40°C to +85°C.

Feature Summary

• Programmable output voltage capability up to 36 V
• Low dynamic output impedance for precise regulation
• Temperature compensated operation over the full rated range

Applications

• Feedback control for driving optocouplers in power supplies
• Voltage monitoring circuits
• Constant current sources and sinks
• Series pass regulators

Procurement Notes

Verify the specific suffix IP corresponds to the PDIP-8 package and industrial temperature range (-40°C to +85°C). Confirm that the ordering code matches the required tolerance and shipping format (e.g., rail vs. tape & reel) as listed in the official onsemi ordering information table. Ensure compliance with RoHS requirements if applicable.

Selection Notes

Select this component when a precision adjustable shunt regulator is needed within the industrial temperature range. The PDIP-8 package is suitable for through-hole mounting applications requiring higher thermal dissipation compared to surface-mount options. Consider the 1.0 mA minimum cathode current requirement for proper regulation during circuit design.

Part Context

This part belongs to the TL431, A, B series of programmable precision references produced by onsemi. It serves as a direct replacement for standard Zener diodes in various analog and digital circuits. The 'A' designation indicates a specific voltage reference tolerance level, while the 'IP' suffix defines the physical package and temperature rating.

Replacement Considerations

Compatible substitutes include TL431BIP and TL431CIP from onsemi, which share the same PDIP-8 package but offer different voltage tolerances. Other manufacturers' TL431 variants may be functionally equivalent provided they meet the electrical specifications and pinout configuration.