SC431CSQTRT

Overview

The SC431CSQTRT is an adjustable shunt voltage reference manufactured by Semtech Corporation. It utilizes a trimmed bandgap design to provide precise voltage regulation with an initial accuracy of 0.5%. The device operates within a wide current range from 130µA to 150mA and features a low dynamic output impedance of 0.25Ω typical. It supports an adjustable output voltage range from 2.5V to 36V. The component is available in SOT-23-3 and SO-8 packages, designed for industrial temperature ranges, and complies with RoHS standards.

Feature Summary

• Trimmed bandgap architecture ensures high precision and stability
• Wide operating current range supports diverse load conditions
• Low dynamic output impedance enhances regulation performance

Applications

• Linear regulators
• Adjustable power supplies
• Switching power supplies
• Battery operated computers
• Instrumentation systems

Procurement Notes

Verify the specific package variant (SOT-23-3 or SO-8) required for your design, as availability may vary between configurations. Confirm that the 0.5% accuracy specification meets your circuit tolerance requirements. Check for end-of-life status or obsolescence notices, as this component family has been subject to discontinuation notifications in the past. Ensure compatibility with your manufacturing process regarding lead-free and RoHS compliance standards.

Selection Notes

Select this component when a precision adjustable reference is needed with a wide input current capability. The 0.5% initial accuracy makes it suitable for applications requiring tighter tolerances than standard 2% references. Consider the low dynamic output impedance for improved transient response in sensitive analog circuits. Evaluate the package options against your PCB space constraints and thermal management needs.

Part Context

This part belongs to the SC431 series of programmable precision references, which serve as alternatives to industry-standard devices like TL431 and LM431. The series is categorized under PMIC - Power Management ICs, specifically Voltage References. It represents a legacy product line from Semtech, often utilized in established designs requiring reliable shunt regulation capabilities.

Replacement Considerations

The datasheet explicitly lists TL1431, TL431, LM431, and AS431 as alternate parts. Verify pinout compatibility and electrical specifications before substitution.