UNISONIC TECHNOLOGIES CO., LTD US2005 Preliminary CMOS IC FIXED CURRENT LIMIT POWER DISTRIBUTION SWITCH DESCRIPTION UTC US2005 is a low voltage cost-effective high-side power switch with current limiting function. It is particularly suitable for general purpose power distribution and control in digital televisions (DTV), printers, set top boxes (STB), PCs, PDAs, and other peripheral devices. UTC US2005 contains a charge pump circuitry to drive the internal MOSFET switch and also incorporate such protection circuits: soft-start circuit protect these devices from being damaged by limiting inrush current during plug-in; thermal shutdown circuit is used to prevent catastrophic switch failure from high-current loads. UVLO is used to ensure that the device remains off unless there is a valid input voltage present. A flag output is designed to indicate fault conditions to the local USB controller. Lower quiescent current as 80μA making this device ideal for portable battery-operated equipment. UTC US2005 allows momentary high current surges to pass unrestricted without sacrificing overall system safety. It also allows output slew rate limiting by an external capacitor. FEATURES * Built-in 80mΩ N-MOSFET * Open-drain fault flag output to Indicate fault conditions * Input voltage varies from 2.5V to 5.5V * 80μA low quiescent current * Current limit values of 0.5A, 0.8A, and 1.2A * Automatic-on output after fault * Thermal protection * Under voltage lock-out (UVLO) ORDERING INFORMATION Note: Ordering Number Lead Free Halogen Free US2005L-AG6-R US2005G-AG6-R xx: Output Voltage, refer to Marking Information. Package Packing SOT-26 Tape Reel MARKING INFORMATION www.unisonic.com.tw Copyright © 2013 Unisonic Technologies Co., Ltd 1 of 5 QW-R502-A04.a US2005 Preliminary PIN CONFIGURATION PIN DESCRIPTION PIN NO. PIN NAME 1 IN 2 3 GND EN 4 FLG 5 CSLEW 6 OUT CMOS IC DESCRIPTION Supply input. This pin provides power to both the output switch and the UTC US2005’s internal control circuitry. Ground. Switch Enable (Input): Active-high (-1) or active-low (-2) Fault status. A logic LOW on this pin indicates the UTC US2005 is in current limiting, or has been shut down by the thermal protection circuit. This is an ‘Open Drain’ output allowing logical OR’ ing of multiple UTC US2005s. Slew rate control. Adding a small value capacitor between this pin and VIN slows turn-ON of the power FET. Switch output. The load being driven by UTC US2005 is connected to this pin. BLOCK DIAGRAM IN Slew Rate Control CSLEW EN UVLO Current Limiting Gate Control Bias Oscillator Thermal Protection Charge Pump Output Voltage Detection Delay OUT FLG GND UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 5 QW-R502-A04.a US2005 Preliminary CMOS IC ABSOLUTE MAXIMUM RATING (TA=25°C, unless otherwise specified) (Note 1) PARAMETER SYMBOL RATINGS UNIT Supply Voltage VIN 6 V Enable Input Voltage VEN 5.5 V Flag Voltage VFLG 5.5 V Power Dissipation (TA=25°C) PD 0.4 W Junction Temperature TJ 150 °C Storage Temperature TSTG -65~150 °C Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. THERMAL DATA PARAMETER Package Thermal Resistance SYMBOL θJA UNIT °C/W RATINGS 2.5~5.5 0~5.5 0~2.1 -40~+85 UNIT V V A °C RECOMMENDED OPERATING CONDITIONS (Note 2) PARAMETER Supply Input Voltage Enable Input Voltage Continuous Output Current Range Ambient Operating Temperature RATINGS 230 SYMBOL VIN VI(EN) TA ELECTRICAL CHARACTERISTICS (VIN=5V, TAMBIENT=25°C unless specified otherwise. Bold indicates -40°C~+85°C limits.) PARAMETER SYMBOL TEST CONDITIONS MIN Switch Input Voltage VIN 2.5 Internal Supply Current IIN Switch=OFF, ENABLE=0V Internal Supply Current IIN Switch=ON, IOUT=0, ENABLE=1.5V Output Leakage Current ILEAK VIN=5V, VOUT=0V, ENABLE=0 Power Switch Resistance RDS(ON) Current Limit: –0.5 Current Limit: –0.8 Current Limit: –1.2 Secondary Current Limit (Kickstart) Under Voltage Lock Out Threshold ILIMIT ILIMIT ILIMIT ILIMIT_2nd UVLOTHRESHOLD ENABLE Input Voltage VEN ENABLE Input Current Fault Status Output Voltage IEN Over-Temperature Threshold VFAULT OTTHRESHOLD VOUT=0.8VIN to VOUT=1V VOUT=0.8VIN to VOUT=1V VOUT=0.8VIN to VOUT=1V 0.5 0.8 1.2 0.7 1.1 1.6 MAX 5.5 5 300 100 100 125 0.9 1.5 2.1 VIN=2.7V 2.2 4 6 A VIN Rising VIN Falling VIL(max.) VIH(min) VEN=0V~5.0V IOL=10mA TJ Increasing TJ Decreasing 2.0 1.9 2.25 2.15 25 2.4 0.5 1 0.25 145 135 5 0.4 V V V V μA V VIN=5V, IOUT=100mA UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw TYP 1 80 12 70 1.5 UNIT V μA μA μA mΩ mΩ A A A °C 3 of 5 QW-R502-A04.a US2005 Preliminary CMOS IC AC CHARACTERISTICS PARAMETER SYMBOL TEST CONDITIONS Output Turn-ON Rise Time tRISE RL=10Ω, CLOAD=1µF, VOUT=10%~90% Time from Current Limiting to FLG State Delay Before Asserting Or tD_FAULT Change. UTC US2005 Releasing FLG Output Turn-ON Delay tON_DLY RL=43Ω, CL=120µF, VEN=50%~VOUT=90% Output Turn-OFF Delay tOFF_DLY RL=43Ω, CL=120µF, VEN=50%~VOUT=90% Notes: 1. Exceeding the absolute maximum rating may damage the device. 2. The device is not guaranteed to function outside its operating rating. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw MIN 500 TYP 1000 MAX 1500 UNIT μs 20 32 49 ms 1000 1500 700 μs μs 4 of 5 QW-R502-A04.a US2005 Preliminary CMOS IC TYPICAL APPLICATION CIRCUIT UTC US2005 5V Supply + IN OUT CSLEW GND EN VBUS + D+/D- USB Port FLG USB Controller UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 5 QW-R502-A04.a