SC5826

USB power distribution switches are high-side nchannel MOSFET switches with built-in overcurrent protection and low on-state resistance. The SC5826 switch is designed to meet the USB requirements for power switching and maintenance-free fault protection for self-powered & bus-powered hub applications. The SC5826 features low on-state resistance to meet the USB requirement for voltage drop and regulation. The switch is controlled by an enable input that is compatible with 3V and 5V logic. The enable input is available with an active high or active low input for maximum design flexibility. The device provides short circuit current limiting at a value of less than 1.6A, well below the USB limit of 5A. During an overcurrent condition the device provides a fault notification to signal the USB controller. An integrated thermal protection circuit automatically shuts the switch off when the junction temperature reaches its thermal limit. The switch remains off until the junction temperature drops approximately 10. The switch will continue to cycle on and off until the fault is removed. Inrush current limiting prevents the voltage drop on an upstream port when the switch is enabled. An undervoltage lockout circuit guarantees the switch is
initially off during start-up.