The wide introduction of an intelligent core source-channel USB programmable limit switch --SA76280. The device features built-in P-channel power MOS, primarily for laptops and desktop computers, USB hubs and USB devices in the PDA. Car charger, multi-port USB Travel Charger Power Supply with USB interface devices, and so on. The limit switch limiting external programming resistor, limiting the flexibility to adjust the current size. SA76280 switch on-resistance only 80mΩ, quiescent supply current of 78μA, the input voltage range of 2.7V to 5.5V, standby current 7μA, thus saving battery power in portable devices. This USB switch provides a number of security measures to protect the USB port. Built-in thermal overload protection to limit the power dissipation and junction temperature inside by the user to accurately set the current limit circuit overload and short circuit protection of the input power. In the event of thermal overload, current limiting, undervoltage lockout (UVLO) and short-circuit fault, thereby protecting the circuit is not damaged. Company Business Website: http: //www.086ic.cn Corporate Website: http: //www.zgsemi.com