RT9728AHZQW

Overview

The RT9728AHZQW is a single-channel P-MOSFET high-side power switch IC designed for USB applications. It operates within a supply voltage range of 2.5V to 5.5V and supports a maximum output current of 1.3A. The device features a typical on-resistance of 120mΩ and includes programmable current limiting, over-temperature protection, and under-voltage lockout. It is housed in a WDFN-6 package and functions across an operating temperature range of -40°C to +85°C.

Feature Summary

• Integrates a P-MOSFET with programmable current limit control for precise load management
• Provides comprehensive fault protection including over-temperature shutdown and under-voltage lockout
• Features low on-resistance to minimize conduction losses in power distribution paths

Applications

• USB port power switching and distribution
• High-side load switching for peripheral devices
• Power management in portable electronic equipment

Procurement Notes

Verify the specific suffix 'ZQW' corresponds to the WDFN-6 package and tape-and-reel configuration when sourcing. Confirm RoHS compliance status through official manufacturer declarations or authorized distributor documentation prior to integration into regulated products.

Selection Notes

Select this component for applications requiring a single-channel high-side switch with adjustable current limiting capabilities. Ensure the required load current does not exceed the 1.3A rating and that the system voltage remains within the 2.5V to 5.5V operational window. Consider thermal performance given the small WDFN-6 footprint.

Part Context

This part belongs to the Richtek RT9728 family of low-voltage power switches. The family offers variants with different packages and current limits, such as the SOT-23-6 packaged RT9728AHGE. These ICs are engineered to provide efficient power distribution with integrated protection features suitable for modern low-voltage digital systems.

Replacement Considerations

The RT9728AHGE serves as a functional alternative within the same family, offering similar electrical characteristics but utilizing a SOT-23-6 package instead of WDFN-6. Verify pin compatibility and thermal requirements before substitution.

FAQ

Does the RT9728AHZQW require a separate supply voltage?

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

What type of interface controls the switch?

The switch is controlled via a simple On/Off interface signal.