RT9742FGJ5F

Overview

The RT9742FGJ5F is a single N-channel MOSFET high-side power switch IC designed for USB applications. It operates with a load voltage range of 2.7V to 6V and supports a maximum output current of 1.5A. The device features a typical on-resistance of 55 milliohms and utilizes a TSOT-23-5 package. Key electrical parameters include fixed current limiting, overtemperature protection, reverse current blocking, and UVLO. It functions within an ambient temperature range of -40°C to 85°C.

Feature Summary

• Integrates N-channel MOSFET with gate driver for high-side switching
• Provides comprehensive fault protection including current limit and thermal shutdown
• Includes status flag output for monitoring operational state
• Supports load discharge functionality for rapid power-down

Applications

• USB port power distribution
• Peripheral device power management
• Battery-powered equipment load switching

Procurement Notes

Verify the specific suffix 'FGJ5F' against the manufacturer's official datasheet to confirm pinout and electrical characteristics match your design requirements. Ensure compatibility with your PCB footprint, specifically the TSOT-23-5 package dimensions. Confirm RoHS compliance status if required by your manufacturing standards. Cross-reference ordering information with authorized distributors to avoid counterfeit components.

Selection Notes

Select this component when a compact, cost-effective solution for low-voltage USB power switching is required. The 1.5A current rating suits most standard USB peripherals. Consider the TSOT-23-5 package size for space-constrained designs. Evaluate the need for integrated fault protection and status flags versus discrete solutions. Compare against other variants in the RT9742 family for different current ratings or package options.

Part Context

The RT9742 series comprises single N-channel high-side power switches optimized for USB applications. These ICs integrate the power MOSFET and control logic into a small footprint. The series offers various current ratings and package options to suit different power distribution needs. The RT9742FGJ5F represents a specific configuration within this family, focusing on 1.5A capability in a thin SOT-23-5 package.

Replacement Considerations

Check for direct substitutes like RT9742CNGJ5F or RT9742ENGJ5F if current ratings differ. Verify pin-to-pin compatibility before swapping. Ensure replacement parts meet the same voltage and temperature specifications.