TL431K-TP

Overview

The TL431K-TP is a programmable precision shunt voltage reference manufactured by Micro Commercial Components (MCC). It operates within a cathode voltage range of up to 36 V and supports an output current of 100 mA. The device features a typical reference voltage of 2.5 V with a tolerance of ±0.5%. It exhibits a temperature coefficient of 50 ppm/°C and functions reliably across an operating temperature range from -40°C to +85°C. Packaged in a SOT-23-3 surface-mount case, it serves as a stable voltage reference for power management circuits.

Feature Summary

• Provides adjustable output voltage capability between the reference threshold and maximum cathode voltage using external resistors.
• Delivers low dynamic output impedance for stable regulation performance under varying load conditions.
• Ensures thermal stability over the specified industrial temperature range with minimal drift.

Applications

• Shunt regulator circuits
• Series regulator configurations
• Switching regulator feedback loops
• Precision voltage references

Procurement Notes

Verify component status carefully as this specific part number is listed as obsolete or end-of-life by the manufacturer. Confirm availability through authorized distributors or check for valid replacement alternatives before finalizing design specifications. Ensure compliance with RoHS standards if required for the target application environment.

Selection Notes

Select this component when a precise, adjustable voltage reference is needed in a compact SOT-23-3 package. Consider the ±0.5% tolerance and 50 ppm/°C temperature coefficient for accuracy requirements. Verify that the 100 mA sink current capability meets the circuit demands and that the -40°C to +85°C operating range suits the environmental conditions.

Part Context

This device belongs to the TL431 family of three-terminal adjustable regulators known for replacing Zener diodes in many applications. It offers superior stability and lower temperature drift compared to standard Zener references. The MCC variant maintains the industry-standard pinout and electrical characteristics associated with the TL431 topology.

Replacement Considerations

Public confirmed substitute part numbers include TL431KA-TP and NCP432BCSNT1G.