Overview

CH217 is a USB port power switch chip with adjustable current limiting threshold. The chip has integrated modules for over-current protection, over-temperature protection, and under-voltage protection, and supports programmable currents of up to 2.7A at 5V, which can limit the output current to protect the power supply system in the event of a short circuit at the VOUT output.

Internal Block Diagram

Features

• Built-in power switching tube, typical 70mΩ on-resistance.
• The current limiting threshold can be adjusted by external resistors, supporting 400mA to 2.7A with ±10% typical error.
• Support power supply voltage 2.7V~5.5V.
• Fast current limiting protection in case of output short circuit.
• Low-power consumption, typical 50uA quiescent operating current.
• Typical shutdown current is less than 1uA, with no reverse current at shutdown.
• SOT23-6 package.

Package