Microchip Technology, Inc. USB Port Power Controller with Charger Emulation UCS1001-3

The UCS1001-3 provides a USB port power switch for precise control of up to 2.5 amperes continuous current with over-current limit (OCL), dynamic thermal management, latch or auto-recovery (low test current) fault handling, selectable active low or high enable, under- and over-voltage lockout, back-drive protection, and back-voltage protection. Split supply support for VS and VDD is an option for low power in system standby states. This gives battery operated applications, like notebook PCs, the ability to detect attachments from a sleep or off state. After the Attach Detect is flagged, the system can decide to wake up and/or provide charging. In addition to power switching and current limiting modes, the UCS1001-3 will automatically charge a wide variety of portable devices, including USB-IF BC1.2, YD/T-1591 (2009), most Apple® and RIM®, and many others. It prioritizes 12W charging, smartphones and tablets. Nine preloaded charger emulation profiles maximize compatibility coverage of peripheral devices. The UCS1001-3 is available in a 20-pin QFN 4 mm x 4 mm package. Additional Features Highlights Port power switch with two current limit behaviors 2.9 V to 5.5 V source voltage range Up to 2.5 A current with 55 mΩ On Resistance Over-current trip or constant current limiting Soft turn-on circuitry Selectable current limit Dynamic thermal management Under- and over-voltage lockout Back-drive, back-voltage protection Latch or auto-recovery (low test current) fault handling Selectable active high or low power switch enable BC1.2 VBUS discharge port renegotiation function Selectable/automatic cycling of USB data line charger emulation profiles Supports 12W charging Allows for active cables USB-IF BC1.2 charging downstream port (CDP) and dedicated charging port (DCP) modes, YD/T-1591, and most Apple® and RIM® protocols standard USB 2.0 compliant high-speed data switch (in Passthrough and CDP modes) Nine preloaded charger emulation profiles for maximum compatibility coverage of peripheral devices Charging Active (UCS1001-3) or Attach Detection (UCS1001-4) open-drain output Fault Alert open-drain output Ultra low power Sleep state Optional split supply support for VBUS and VDD for low power in system standby states Wake on Attach USB (UCS1001-2) Wide operating temperature range: -40°C to +85°C IEC61000-4-2 8 / 15 kV ESD immunity UL recognized and EN/IEC 60950-1 (CB) certified Target Applications Notebook and Netbook Computers Tablets and E-book Readers Desktops and Monitors Docking Stations and Printers AC-DC wall adapters