UCC3981 PRELIMINARY Universal Serial Bus Hot Swap Power Controller FEATURES DESCRIPTION • Fully USB Compliant The UCC3981 Hot Swap Power Controller is designed to provide a self powered USB hub with a local 3.3V regulated voltage and four 5V regulated voltages for USB ports. Each of the 5V output ports is individually enabled for optimal port control. Each port also provides an overcurrent fault signal indicating that the port has exceeded a 500mA current limit. The 3.3V linear regulator is used to power the local USB microcontroller. This regulator is protected with a 100mA current limit and has a logic level enable input. • Support Four 5V Peripherals and One USB 3.3V Controller • Separate Power Enables • 500mA Current Limiting per Channel • Separate Open Drain Fault Indicator for Each Channel • 3.3V Output for USB Controller • Available in 28 Pin Wide Surface Mount and DIP The UCC3981 can be configured to provide USB port power from a loosely regulated voltage such as a Filament voltage internal to a monitor. Pre-regulation is provided by an internal linear regulator controller and one external logic level N-channel MOSFET. The UCC3981 can also be configured without using the pre-regulator stage by connecting the VREG pins to a regulated 5.5V 2A source. The UCC3981 comes in a 28-pin wide SOIC power package optimized for power dissipation, and is protected by internal over-temperature shutdown mechanism, which disables the outputs should the internal junction temperature exceed 150°C. APPLICATION AND BLOCK DIAGRAM UCC3981 USB HUB POWER CONTROLLER UDG-97101 11/98 UCC3981 ABSOLUTE MAXIMUM RATINGS CONNECTION DIAGRAM VFIL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9V VCON Supply Votage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9V Logic Inputs (ENA-D, ENHUB) Maximum Forced Voltage . . . . . . . . . . . . . . . . . –0.3V to 7V Maximum Forced Current . . . . . . . . . . . . . . . . . . . . . . ±1mA V33 Maximum Forced Voltage. . . . . . . . . . . . . . . . . . . . . . . . . 5V Maximum Current . . . . . . . . . . . . . . . . . . . . . . . . . . . 200mA V5A-D Maximum Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9V Maximum Current . . . . . . . . . . . . . . . . . . . . . . . . . . . 750mA Storage Temperature . . . . . . . . . . . . . . . . . . . −65°C to +150°C Junction Temperature . . . . . . . . . . . . . . . . . . . –55°C to +150°C Lead Temperature (Soldering, 10 sec.) . . . . . . . . . . . . . +300°C SOIC-28 (Top View) DWP Package Unless otherwise indicated, voltages are reference to ground. Pulsed is defined as a less than 10% duty cycle with a maximum duration of 500mS. Currents are positive into, negative out of the specified terminal. All voltages are with respect to ground. Consult Packaging Section of Databook for thermal limitations and considerations of packages. * DWP package pin 28 serves as signal ground; Pins 7, 8, 9, 20, 21, 22 serve as heatsink/ground. ELECTRICAL CHARACTERISTICS Unless otherwise specified, TJ = 0°C to 125°C for the UCC3981. VFIL = 6.5V, VHUB = 5V. TA = TJ. PARAMETER TEST CONDITIONS MIN TYP MAX UNITS Input Supply Currents VHUB Supply Current No External Load on V33 VFIL Supply Current 1 3 mA 1 3 mA 2.5 2.65 V 3 10 mV Reference VREF Voltage Over Temperature Line Regulation VHUB = 4.5V to 9V 2.35 3.3V Regulator V33 Voltage TJ = 25°C, ILOAD = 10mA 3.2 3.3 3.4 V 3.165 3.3 3.435 V VHUB = 6V, Output shorted to Ground 100 120 150 mA 0A to 2A, 0°C to 125°C, VFIL = 6V to 9V 5.25 5.5 5.7 V TJ = 25°C, ILOAD = 250mA, VREG = 5.5V 4.85 5 5.15 V 0mA to 500mA, 0°C to 125°C 4.8 5 5.2 V VREG = 5.5V, Output Shorted to Ground 500 600 750 mA 11 11.45 12 V 10.5 11.45 12 V 9 15 kΩ 0mA to 100mA, 0°C to 125°C, VHUB = 4.5V to 9V Short Circuit Current Limit Pre-Regulator VREG Voltage 5V Regulator V5A-D Voltage Short Circuit Current Limit Charge Pump Quiescent Output Voltage TJ = 25°C, VFIL = 6V, ENA-D = 5V, ENHUB = 5V 0°C to 125°C, VFIL = 6V Output Impedance 2 UCC3981 ELECTRICAL CHARACTERISTICS Unless otherwise specified, TJ = 0°C to 125°C for the UCC3981. VFIL = 6.5V, VHUB = 5V. TA = TJ. PARAMETER TEST CONDITIONS MIN TYP MAX UNITS Enable Inputs ENA-D Inputs - Guaranteed Low ENA-D Inputs - Guaranteed High 0.7 V 0.7 V 3 V ENHUB Input - Guaranteed Low ENHUB Input - Guaranteed High 3 V Overcurrent Signals Active Sink Current IOCX =100mA 140 500 mV PIN DESCRIPTIONS ENA-D: Separate enables pins for each of the four 5V supplies. V33: 3.3V regulator output. Enable when ENHUB is high. Current limit is 100mA minimum. ENHUB: Enables the 3.3V output V33. Pulling this pin low disables V33. VDRIVE: Internal charge pump voltage is brought out for external decoupling. Nominal voltage is between 11V and 13V. No external loading permitting. Decouple with at least 0.001µF capacitor. GATE: Gate drive for an external NMOS used to regulate the 5.5V VREG supply. Minimum available drive is 11V. GND: All 6 GND pins must be tied to the system ground. In addition to serving as electrical conductors, these 6 pins are heat sinks. Refer to the Packaging Device Temperature Management guide in the Packaging section of the Unitrode Databook. VFIL: Bias supply for all four of the 5V regulators. VFIL voltage must be between 6V and 9V. OCA-D: Open drain overcurrent indicator. OCA-D can be wire OR'ed by the user to create a single overcurrent indicator. VREF: Internal 2.5V reference is brought out for external decoupling only. Decouple with 0.01µF capacitor. VHUB: Supply for the 3.3V USB controller power supply and bandgap reference. VREG: Regulated to 5.5V by means of an external NMOS. Two pins supply up to a total of 2.5A to the four 5V bus voltages (V5A, V5B, V5C, V5D). V5A-D: 5V regulated output with enable, 500mA (minimum) current limit, and overcurrent indicator. UNITRODE CORPORATION 7 CONTINENTAL BLVD. • MERRIMACK, NH 03054 TEL. (603) 424-2410 • FAX (603) 424-3460 3 PACKAGE OPTION ADDENDUM www.ti.com 18-Sep-2008 PACKAGING INFORMATION Orderable Device Status (1) UCC3981DWP OBSOLETE Package Type Package Drawing Pins Package Eco Plan (2) Qty UTR TBD Lead/Ball Finish Call TI MSL Peak Temp (3) Call TI (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. 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