MAX1922ESA+

Overview

The MAX1922ESA+ is a current-limited power switch IC designed for USB port distribution. It operates within a supply voltage range of 2.7 V to 5.5 V and delivers an output current of 400 mA with a maximum on-resistance of 125 mOhms. The device features a hard current limit set at 1.75 A, ensuring protection against overload conditions. Electrical performance includes a maximum turn-on time of 200 us and a maximum idle time of 20 us. It functions reliably across an industrial temperature range from -40 C to +85 C. The component is housed in an 8-pin SOIC-Narrow package suitable for surface mount applications.

Feature Summary

• Integrated current limiting functionality protects downstream loads from overcurrent events
• Optimized low on-resistance minimizes power dissipation during conduction
• Designed specifically for high-speed switching requirements in USB interface circuits

Applications

• USB port power distribution systems
• Current-limited switching for peripheral devices
• Overload protection in portable electronics

Procurement Notes

Verify the specific suffix designation to confirm the exact package variant and tape-and-reel or tube packaging configuration required for your assembly process. Ensure that the operating voltage parameters align with your system's power rail specifications before integration. Cross-reference the manufacturer datasheet for detailed thermal management guidelines and pinout assignments to guarantee correct PCB layout implementation.

Selection Notes

Select this component when designing circuits requiring precise current limiting for USB ports rather than simple on/off switching. Consider the 125 mOhms on-resistance impact on overall system efficiency and thermal performance. Evaluate the 1.75 A hard limit threshold against potential surge currents from connected peripherals to ensure adequate protection margins without nuisance tripping during normal operation.

Part Context

This part belongs to the Maxim Integrated family of power distribution switches. It serves as a specialized solution for managing power delivery in multi-port USB hubs and host controllers. The design focuses on providing robust fault protection while maintaining signal integrity and low latency for data communication lines connected to the switched power rails.

Replacement Considerations

Consult official Analog Devices substitution guides for verified alternatives. Generic cross-references may not match the specific current limit thresholds or package dimensions.