Product Description
California Micro Devices’ CM3511 is a dual port USB overcurrent power switch that selects between two independent 5V inputs available on a PC, depending on the state of a logic input (SEL). The device has two pairs of power switches, and each pair is an analog “OR” function, providing a continuous voltage at both outputs during power transfer between inputs.

Features
• Dual outputs, each with independent over-current protection circuitry and indicator
• Supports standby mode in PCs so that a peripheral can ramp down safely to a current <100mA
• Up to 1.2A (VCC) / 200mA (VSBY) continuous current on each output
• Over-current limits at 1.2A / 200mA respectively
• 10msec min fault blanking delay on OC# outputs prevents false overcurrent alarms
• Prevents backdrive current when host powered off
• Low operating current (95µA typ.)
• Small 8-Lead SOIC package

Applications
• PC motherboards, Notebooks, Set-Top-Boxes