TL431BCPKG3

Overview

The TL431BCPKG3 is an adjustable precision shunt regulator manufactured by Texas Instruments, housed in a SOT-89-3 surface-mount package. It provides an adjustable output voltage ranging from 2.495 V to 36 V with an initial accuracy of ±0.5%. The device supports a maximum cathode current of 100 mA and operates within a temperature range of -40°C to +125°C. It features a maximum input voltage of 37 V and a typical temperature coefficient of 92 PPM/°C.

Feature Summary

• Provides precise voltage regulation with ±0.5% initial accuracy for stable reference applications
• Offers wide adjustable output voltage capability from 2.495 V up to 36 V using external resistors
• Designed for robust operation across extended industrial temperature ranges

Applications

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

Procurement Notes

This component has reached End-of-Life status as per Product Change Notification dated June 16, 2023. Verify availability through authorized distributors or secondary markets. Confirm RoHS3 compliance and MSL level 2 handling requirements during sourcing. Cross-reference recommended substitutes if new production units are required for long-term projects.

Selection Notes

Select this part when high precision (±0.5%) is required in a compact SOT-89-3 footprint. Ensure the design accommodates the specified 100 mA maximum cathode current and 37 V maximum input voltage limits. Consider thermal management for operation near the upper temperature limit of 125°C.

Part Context

Part of the TL431B series, this device serves as a direct replacement for Zener diodes in many linear and switching regulator topologies. It belongs to the broader TL431 family of programmable parallel regulators known for low output impedance and well-defined turn-on characteristics.

Replacement Considerations

TL431BCPK is listed as a manufacturer-recommended alternative.