When the VBUS voltage is higher than V_{VBUS_OVP} (typical 26 V), the converter stops switching immediately to protect the internal power MOSFETs. As the SYS voltage falls below the battery voltage, the BATFET is turned on to supplement the system load. During VBUS over-voltage, an INT pulse is asserted to alert the host, if the VBUS_OVP_MASK is low, the VBUS_OVP_STAT and VBUS_OV_FLAG registers report the fault. The device automatically starts switching again when the VBUS voltage drops below the threshold.