MIC2549A-1BTS-TR

Overview

The MIC2549A-1BTS-TR is a high-side power switch IC from Microchip Technology, designed for USB power distribution applications. It features a single output channel capable of delivering up to 3 A of load current with a maximum on-resistance of 50 mΩ. The device supports a supply voltage range of 2.7 V to 5.5 V and includes programmable current limiting between 500 mA and 3 A. Key protection mechanisms include over-temperature latch shutdown and thermal shutdown. The component operates within a temperature range of -40°C to +85°C and is housed in a 14-TSSOP surface-mount package.

Feature Summary

• Integrates programmable current limit functionality allowing adjustment from 500 mA to 3 A
• Provides robust over-temperature latch protection to prevent thermal damage
• Features low on-resistance for efficient power delivery in high-side switching applications

Applications

• USB hub power distribution
• Peripheral port power management
• High-side switching for low-voltage digital loads

Procurement Notes

Verify the specific suffix 'BTS' against the manufacturer's official datasheet to confirm pinout compatibility and package dimensions. Ensure the procurement source provides valid RoHS compliance documentation. Cross-reference the part number with the latest Microchip release notes to confirm availability status, as some variants may be discontinued or superseded by newer revisions.

Selection Notes

Select this component when a single-channel high-side switch with adjustable current limiting is required for USB or similar 5 V systems. Consider the 14-TSSOP package for space-constrained designs. Evaluate the need for over-temperature latch versus standard thermal shutdown based on system recovery requirements. Ensure the external programming components match the desired current limit setting within the 500 mA to 3 A range.

Part Context

This part belongs to the MIC2549A family of power switches, which are optimized for USB power distribution. The family typically includes variants with different numbers of channels and package options. The MIC2549A series is designed to replace discrete MOSFET solutions, offering integrated protection and control features in a compact form factor suitable for modern portable electronics.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult Microchip Technology directly for recommended cross-references or updated product line replacements.