RT9711CGBG

Overview

The RT9711CGBG is a high-side power switch manufactured by Richtek USA Inc., designed for USB-compliant applications. It features an N-channel MOSFET with a typical on-resistance of 90mΩ in the SOP-8 package. The device supports a load voltage range of 2.5V to 5.5V and provides a continuous output current of 0.6A. Key electrical characteristics include a 1.7V typical under-voltage lockout threshold and low supply currents of 25μA (on) and 1μA (off). It incorporates fixed current limiting, thermal shutdown, reverse current blocking, and an open-drain fault flag output.

Feature Summary

• Complies with USB specifications for portable device power management
• Integrates comprehensive protection mechanisms including current limiting, thermal shutdown, and reverse current flow blocking
• Features an open-drain fault flag output for system status monitoring
• Supports hot plug-in applications via built-in soft-start functionality

Applications

• Portable devices requiring low power consumption and small PCB footprint
• USB port power switching and distribution
• Battery-powered equipment with high-side load control requirements

Procurement Notes

Verify the specific suffix 'GBG' against the official Richtek datasheet to confirm package type and tape/reel configuration. Ensure compatibility with the required 0.6A current rating and 90mΩ on-resistance for your design. Check for RoHS compliance and environmental certifications such as TUV IEC60950-1 if applicable to your target market regulations.

Selection Notes

Select this component when a 0.6A continuous load current is sufficient for the application, distinguishing it from higher-current variants like the RT9711A/B which support 1.5A. The SOP-8 package is suitable for designs where board space allows for slightly larger footprints compared to SOT-23-5 options. Consider the 90mΩ on-resistance for power dissipation calculations at full load.

Part Context

The RT9711 series consists of high-side power switches optimized for USB applications. The RT9711C/D variants are specifically rated for 0.6A continuous load current, whereas the A/B variants support 1.5A. This family offers various package options including SOT-23-5, TSOT-23-5, SOP-8, and MSOP-8 to accommodate different size constraints.

Replacement Considerations

RT9711DGS: Similar 0.6A variant in SOP-8 package with comparable electrical characteristics.

FAQ

Does the RT9711CGBG allow reverse current flow?

No, the device includes reverse current flow blocking and does not utilize a body diode.

What is the typical quiescent current in the off state?

The typical supply current is 1μA when the switch is in the off state.