RT9742VGJ5

Overview

The RT9742VGJ5 is a single N-channel high-side power switch IC designed for USB applications. It features a maximum on-resistance of 70 mΩ and supports an output current of 2 A. The device operates within a supply voltage range of 2.7 V to 6 V, with a maximum operating temperature of +85 °C and a minimum of -40 °C. It utilizes a TSOT-23-5 package and includes a flag output for fault indication.

Feature Summary

• Integrates over-current protection, short fold-back circuit, thermal shutdown, and under-voltage lockout.
• Includes an embedded delay function to prevent miss-operation caused by inrush current.
• Provides a flag output signal to indicate fault conditions to the local USB controller.

Applications

• USB peripherals
• Notebook PCs

Procurement Notes

Verify the specific suffix 'VGJ5' against the manufacturer datasheet to confirm the exact current rating and resistance parameters, as the RT9742 family offers multiple variants. Ensure the ordering information matches the required package type and electrical specifications for the target application design.

Selection Notes

Select this component when a cost-effective, low-voltage high-side switch with integrated protection is required. The choice depends on matching the specific on-resistance and current limit values defined by the suffix, ensuring compatibility with the system's USB power supply requirements and thermal constraints.

Part Context

The RT9742 series consists of low-voltage, single N-MOSFET high-side power switches optimized for USB applications. These ICs are designed to provide flexible solutions with low switch-on resistance and low supply current, available in various packages including TSOT-23-5 and SOT-23-3 to suit different space constraints.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify cross-reference data through official manufacturer channels before substitution.