TL431BIPKG3

Overview

The TL431BIPKG3 is a three-terminal adjustable precision shunt regulator manufactured by Texas Instruments. It operates within a voltage range of 2.495 V to 36 V and features an initial accuracy of ±0.5%. The device supports a maximum cathode current of 100 mA with a minimum operating current of 700 µA. It is housed in a SOT-89-3 surface-mount package and functions across an industrial temperature range of -40°C to +85°C.

Feature Summary

• Provides precise programmable reference voltage functionality via external resistors
• Delivers sharp turn-on characteristics suitable for replacing Zener diodes
• Maintains thermal stability across specified industrial temperature ranges

Applications

• Board-level regulation circuits
• Adjustable power supply designs
• Switching power supply feedback loops

Procurement Notes

Verify component authenticity through authorized channels as the part status is End-of-Life. Confirm that the SOT-89-3 package matches design requirements. Ensure compliance with RoHS3 specifications and check moisture sensitivity level (MSL 2) handling procedures during assembly.

Selection Notes

Select this variant for applications requiring ±0.5% initial accuracy and operation between -40°C and +85°C. Consider the SOT-89-3 package for space-constrained surface-mount designs. Verify that the 100 mA cathode current capability meets load requirements.

Part Context

This component belongs to the TL431 family, originally released in 1978 as an improved version of the TL430. It serves as a precision adjustable shunt regulator designed to offer better voltage accuracy and stability compared to temperature-compensated Zener diodes.

Replacement Considerations

TL431BCPKG3 is listed as a manufacturer-recommended substitute.