LM3544MX-H/NOPB

Power Distribution Switches, Load Drivers Overview

The LM3544MX-H/NOPB is a quad-port USB power distribution switch manufactured by Texas Instruments. It provides over-current protection and power switching for four independent channels in a 16-pin SOIC package. The device supports load voltages between 2.7V and 5.5V with a maximum output current of 500mA per channel. It operates within an ambient temperature range of -40°C to 85°C.

Power Distribution Switches, Load Drivers Feature Summary

• Integrates fixed current limiting, over-temperature protection, and under-voltage lockout for comprehensive fault management.
• Provides status flag indication to monitor operational state and fault conditions across the four ports.
• Designed specifically for USB power distribution applications requiring reliable multi-channel switching.

Power Distribution Switches, Load Drivers Applications

• USB hub power distribution circuits
• Multi-port charging stations
• Peripheral power management systems

Power Distribution Switches, Load Drivers Procurement Notes

Verify the specific suffix 'H' against the official datasheet to confirm it denotes the extended temperature or specific variant characteristics as defined by Texas Instruments. Ensure the ordering part number matches the exact package and thermal rating required for your design. Cross-reference with authorized distributors to confirm RoHS compliance and lead times.

Power Distribution Switches, Load Drivers Selection Notes

Select this component when designing systems requiring four independent USB ports with integrated protection. Compare the 500mA per-channel limit against total system load requirements. Consider the SOIC-16 package constraints for PCB layout. Evaluate if the fixed current limit meets the specific USB specification needs without external sensing components.

Power Distribution Switches, Load Drivers Part Context

This part belongs to the LM3544 series of USB power switches. It shares functional similarities with the LM3544M-L/NOPB but may differ in temperature ratings or internal thresholds. The series is designed to simplify USB power distribution by integrating protection features typically handled by discrete components.

Power Distribution Switches, Load Drivers Replacement Considerations

The LM3544MX-L/NOPB is a documented alternative within the same family. Verify if the operating temperature range and internal threshold differences are compatible with the target application before substitution.