RT9702GB

Overview

The RT9702GB is a single N-Channel MOSFET high-side power switch optimized for Universal Serial Bus (USB) applications. It features an integrated low on-resistance output, typically 80mΩ, and supports continuous load currents of up to 500mA. The device operates within a wide input voltage range from 2V to 5.5V and includes an open-drain fault flag output. Key protection mechanisms include current limiting, thermal shutdown, and reverse current flow blocking without a body diode. It utilizes a TSOT-23-5 package.

Feature Summary

• Compliant with USB specifications for bus-powered and self-powered applications
• Integrated N-Channel MOSFET with low typical on-resistance
• Open-drain fault flag output for status monitoring
• Built-in current limiting and thermal shutdown protection

Applications

• USB bus or self-powered hubs
• USB peripherals and hot-plug applications
• ACPI power distribution systems
• Notebook and motherboard PCs
• Battery-charger circuits

Procurement Notes

Verify the specific suffix GB against the manufacturer datasheet to confirm pinout compatibility and package dimensions. Confirm RoHS compliance status and lead-free certification prior to integration. Check for end-of-life notifications or alternative package options if long-term supply stability is required for production.

Selection Notes

Select this component for designs requiring compact high-side switching in USB environments. The TSOT-23-5 package minimizes board space compared to larger alternatives. Ensure the application load does not exceed the 500mA continuous rating. Consider the RT9702A variant if higher current capacity is needed.

Part Context

The RT9702 series belongs to Richtek's portfolio of cost-effective, low-voltage power switches designed for USB interfaces. These devices are engineered to reduce board area while providing robust protection features essential for portable electronics and computer peripheral connectivity standards.

Replacement Considerations

RT9702A offers 1.1A continuous load current capability in the same package family.