TL431ACCT

Overview

The TL431ACCT is an adjustable shunt voltage reference manufactured by STMicroelectronics, housed in a SOT-323-6L surface-mount package. It provides an output voltage range from 2.495 V to 36 V, set via two external resistors. The device features an initial accuracy of ±1% and operates within a temperature range of 0°C to +70°C. Key electrical parameters include a maximum cathode current of 100 mA, a minimum operating current of 1 mA, and a typical dynamic impedance of 0.22 Ω.

Feature Summary

• Adjustable output voltage capability ranging from 2.495 V to 36 V using external resistors
• High precision with guaranteed ±1% initial accuracy for stable reference performance
• Wide sink current operating range from 1 mA to 100 mA
• Low dynamic output impedance ensuring effective regulation under varying load conditions

Applications

• Precision voltage references in power supply circuits
• On-line DC/DC converters requiring stable feedback
• Internal reference voltage sources for data acquisition systems
• Programmable linear regulators and switching power supplies

Procurement Notes

Verify the specific suffix 'CCT' corresponds to the SOT-323-6L package and ±1% tolerance grade when sourcing. Confirm RoHS compliance status and moisture sensitivity level (MSL 1) requirements for your assembly process. Ensure the ordering quantity matches the manufacturer's standard packaging specifications to avoid handling discrepancies.

Selection Notes

Select this component when a compact surface-mount solution is required for high-precision voltage referencing. The SOT-323-6L package offers space efficiency compared to traditional through-hole options. Consider the ±1% accuracy and 0°C to +70°C operating range against application thermal constraints. Verify that the 100 mA cathode current capability meets the circuit's sink requirements.

Part Context

This part belongs to the TL431 family of programmable shunt voltage references, widely used as a low-cost alternative to Zener diodes. The TL431 series is known for its replaceability in existing designs and broad industry adoption. The 'A' designation indicates the ±1% accuracy grade, while 'CCT' specifies the commercial temperature range and SOT-323-6L packaging format.

Replacement Considerations

Direct substitutes include the TL431ACDCKR from Texas Instruments. Other compatible options are the TL431AIDCKR and TL431AIDCKT from Texas Instruments. Verify pinout compatibility and package dimensions before substituting.