Microchip UCS1003-1-BP-TR

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 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/signature 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

• 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

• 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® and Samsung 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

• 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

Applications:
• Notebook and Netbook Computers
• Tablets and E-book Readers
• Desktops and Monitors
• Docking Stations and Printers
• AC-DC wall adapters