RT9728ALGE

Overview

The RT9728ALGE is a single P-channel high-side power switch IC designed for USB applications. It features a low on-resistance of 120mΩ and supports a maximum output current of 1.3A. The device operates within a load voltage range of 2.5V to 5.5V without requiring a separate supply voltage. Key protection mechanisms include adjustable current limiting, over-temperature shutdown, and under-voltage lockout (UVLO). It utilizes an active-low enable interface and provides a status flag output. The component is housed in a compact SOT-23-6 package and is rated for operation across an ambient temperature range of -40°C to 85°C.

Feature Summary

• Integrates a single P-channel MOSFET with programmable current limiting for precise load control.
• Includes comprehensive fault protection featuring over-temperature shutdown and under-voltage lockout.
• Provides a status flag output to indicate operational state or fault conditions.
• Operates directly from system voltages without requiring an additional supply rail.

Applications

• USB port power distribution and switching
• Battery-powered portable electronic devices
• Peripheral load management in consumer electronics

Procurement Notes

Verify the specific suffix 'LGE' corresponds to the required tape and reel packaging configuration when ordering. Confirm that the adjustable current limit settings align with the target application's protection requirements before finalizing procurement. Ensure compatibility with the intended PCB footprint for the SOT-23-6 package during the sourcing phase.

Selection Notes

Select this component for applications requiring a cost-effective, single-channel high-side switch with integrated protection. It is suitable where space constraints necessitate a small SOT-23-6 package. Consider the 1.3A current rating and 120mΩ on-resistance for thermal management calculations. Verify that the 2.5V to 5.5V operating range matches the system voltage rails.

Part Context

The RT9728A series represents Richtek's solution for low-voltage power distribution switches. This family targets USB and portable device markets by combining power switching capabilities with essential protection features in a minimal footprint. The RT9728ALGE is a specific variant within this lineup, distinguished by its packaging and specific electrical characteristics optimized for high-side switching applications.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Evaluate alternative single-channel P-channel power switches with similar current ratings and protection features if substitution is required.

FAQ

Does the RT9728ALGE require a separate supply voltage?

No, the device does not require a separate supply voltage (Vcc/Vdd) as it operates directly from the load voltage.

What protection features are included in the RT9728ALGE?

The IC includes adjustable current limiting, over-temperature shutdown, and under-voltage lockout (UVLO).