Microchip Technology, Inc. Programmable USB Port Power Controller with Charger Emulation UCS1003-1

The UCS1003 provides a USB port power switch for precise control of up to 2.7 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, back-voltage protection and charge active signal*. 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 UCS1003 will automatically charge a wide variety of portable devices, including USB-IF BC1.2, YD/T-1591 (2009), most Apple®, Samsung, and RIM®, and many others. Nine preloaded charger emulation profiles maximize compatibility coverage of peripheral devices. As well, a customizable charger emulation profile** is available to accommodate unique existing and future portable device handshaking/signatur e requirements. The UCS1003 also provides current monitoring** to allow intelligent management of system power and charge rationing for controlled delivery of current regardless of the host power state. This is especially important for battery operated applications that want to provide power in a standby and/or off state but do not want to drain the battery excessively. The UCS1003 is available in a 20-pin QFN 4 mm x 4 mm package. *UCS1003-2 only ** UCS1003-1 only Additional Features Highlights Port power switch with two current limit behaviors 2.9 V to 5.5 V source voltage range Up to 2.7 A current with 55 mΩ On Resistance Over-current trip or constant current limiting Soft turn-on circuitry Programmable 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 charger emulation Allows for active cables USB-IF BC1.2 charging downstream port (CDP) and dedicated charging port (DCP) modes, YD/T-1591, and most Apple®, Samsung and RIM® protocols standard; others as defined via the SMBus 2.0/I2C® 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 One custom programmable charger profile for portable device support for fully host controlled charger emulation** Custom Emulation profile uses unique stimulus and response method useful for future profiles** Self-contained current monitoring and charge rationing for power allocation applications Automatic shutdown when Battery Full option Low power Attach Detection and open-drain A_DET# pin (not in UCS1003-2) Charge active signal (UCS1003-2 only) Ultra low power Sleep state Optional split supply support for VBUS and VDD for low power in system standby states Wake on Attach USB SMBus 2.0/I2C communications Supports Block Write and Read Multiple SMBus addresses 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