RT9711CGJ5

Overview

The RT9711CGJ5 is a high-side power switch from the Richtek RT9711 series, designed for USB applications. It features an integrated N-channel MOSFET with a typical on-resistance of 80mΩ in the TSOT-23-5 package. The device supports a continuous load current of 0.6A and operates within a wide input voltage range of 2.5V to 5.5V. Key electrical characteristics include a typical quiescent current of 25μA in the on-state and 1μA in the off-state. It incorporates open-drain fault flag output, soft-start functionality, under-voltage lockout (UVLO), current limiting, and thermal shutdown protection.

Feature Summary

• Compliant with USB specifications for portable battery-operated equipment
• Integrated N-MOSFET with low on-resistance for minimal voltage drop
• Open-drain fault flag output for status monitoring
• Built-in protections including UVLO, current limit, and thermal shutdown

Applications

• Bus-powered Universal Serial Bus (USB) applications
• Portable battery-operated equipment
• Hot plug-in applications requiring soft-start

Procurement Notes

Verify the specific suffix J5 corresponds to the TSOT-23-5 package type as documented in official Richtek ordering information. Confirm that the 'C' variant designation aligns with the 0.6A continuous load current rating specified for the RT9711C/D sub-series. Ensure compatibility with the required operating temperature range and check for RoHS compliance status in the latest datasheet revision.

Selection Notes

Select this component when a compact high-side switch with USB compliance is required. The TSOT-23-5 package minimizes board space compared to SOP-8 options. Choose this part over higher current variants if the load does not exceed 0.6A continuously. Consider the 80mΩ on-resistance for efficiency requirements and verify that the 2.5V minimum input voltage suits the system power rail.

Part Context

The RT9711 series comprises high-side power switches available in multiple packages and current ratings. The CGJ5 variant specifically utilizes the TSOT-23-5 package and is rated for 0.6A continuous load, distinguishing it from the 1.5A rated A/B variants. This family is optimized for USB power distribution and portable electronics where low quiescent current and small footprint are critical design constraints.

Replacement Considerations

Official substitutes within the same family include RT9711AGJ5 (1.5A, TSOT-23-5) and RT9711DGJ5 (0.6A, TSOT-23-5). Verify pinout and package dimensions match before substitution. Cross-referencing with other manufacturers' USB switches requires careful validation of on-resistance and protection thresholds.