General Description
The MAX1946 single current-limited switch with autoreset supplies a guaranteed 500mA load in accordance with USB specifications. The MAX1946 operates from a 2.7V to 5.5V input supply and consumes only 40µA of quiescent current when operating and only 3µA in shutdown. Selectable active-high/active-low control logic and shutdown control provide additional flexibility. An autoreset feature latches the switch off in the event of a short circuit, saving system power. The switch reactivates upon removal of the shorted condition.

FEATUREs
♦ Single USB Switch in 3mm x 3mm Package
♦ Autoreset Feature Saves System Power
♦ Guaranteed 500mA Load Current
♦ Built-In 20ms Fault-Blanking Circuitry
♦ Active-High or Active-Low Control Logic
♦ Fully Compliant to USB Specifications
♦ 2.7V to 5.5V Input Voltage Range
♦ Fault-Indicator Output
♦ Thermal-Overload Protection
♦ UL Certification Pending

APPLICATIONs
    USB Ports and USB Hubs
    Notebook and Desktop Computers
    PDAs and Palmtop Computers
    Digital Cameras
    Docking Stations