The RT9728BHGQW is a low voltage single P-MOSFET Power Switch IC for USB application with an adjustable current limit feature. Low switch-on resistance (typical 120mR) and low supply current (typical 120μA) are realized in this IC. The RT9728B can offer an adjustable current limit threshold between 75mA and 1.8A (typical) via an external resistor. The ±10% current limit accuracy can be realized for all current limit settings. In addition, a flag output is available to indicate fault conditions to the local USB controller. Furthermore, the chip also integrates an embedded delay function to prevent mis-operation due to high inrush current. The RT9728B is an ideal solution for USB power supplies and can support flexible applications since it is suitable for various current limit requirements.
