MIC2536 Datasheet | Micrel Semiconductor

Micrel Dual USB Power Distribution Switch Preliminary Information General Description The MIC2536 is a cost-effective high-side power switch, with two independently controlled channels, optimized for buspowered Universal Serial Bus (USB) applications. Few external ponents are necessary to satisfy USB requirements. Each switch channel of the MIC2536 will supply up to 100m A as required for USB bus-powered downstream devices. Fault current is limited to typically 275m A by fast-acting currentlimit circuitry which minimizes voltage droop on the upstream port during fault conditions. A flag output with transient filter indicates fault conditions to the local USB controller but will ignore short flag signals resulting from inrush current during hot plug-in events. Soft start eliminates the momentary voltage droop on other ports that may occur when the switch is enabled in buspowered applications. Additional Features include thermal shutdown to prevent catastrophic switch failure from highcurrent loads and 3.3V and 5V logic patible enable inputs. The MIC2536 is available in active-high and active-low versions in 8-lead SOP and MSOP. Features - - - - - - - - - - - - - - - - - - - - - pliant to USB specifications 2.7V to 5.5V operating range 150m A minimum continuous load current per channel 400mΩ typical on-resistance Fast-acting short circuit protection with thermal shutdown Integrated filter eliminates false overcurrent flag assertions Individual open-drain fault flag pins with transient filter 3V/5V-patible enable inputs Active-high (-1) and active-low (-2) versions Reverse-current blocking in off mode (no “body diode”) Soft-start circuit 100µA maximum on-state supply current <1µA typical off-state supply current - 40°C to 85°C operation USB keyboard bus-powered hubs USB bus-powered docking stations Note Book PCs PDAs General purpose power distribution applications PC board hot swap Inrush current-limiting Applications Typical...