UNISONIC TECHNOLOGIES CO., LTD US3076-US3376 Preliminary CMOS IC DUAL USB HIGH-SIDE POWER SWITCH DESCRIPTION The UTC US3076-US3376 is an integrated dual channel for USB high-side power switch. It particularly designed for self-powered and bus-powered Universal Serial Bus (USB) applications. The RDS(ON) of the MOSFET switch is as low as 87mΩ. OC which is open-drain output report over-current or over-temperature event, has deglitch timeout period typically 9ms. The UTC US3076-US3376 incorporates some protection circuits, such as current limiting circuit with foldback function, thermal shutdown circuit which is designed to prevent catastrophic switch failure due to increasing power dissipation when continuous heavy loads or short circuit occurs. A built-in charge pump is used to drive the N-channel MOSFET that is free of parasitic body diode to eliminate any reversed current flow across the switch when it is powered off. The UTC US3076-US3376 is applied in high-side power protection switch, USB power management, USB host and self-powered bubs, USB bus-powered hubs, hot plug-in power supplies, and battery-charger circuits. SOP-8 FEATURES * Operating on the Range of 2.7V to 5.5V * High-Side MOSFET with 87mΩ RDS(ON) * Quiescent Supply Current: 65μA * Available with 4 Versions of Current Limits with Foldback * Rise Time: 400μS (TYP) * UVLO (Under Voltage Lockout) * Shutdown Supply Current: 1μA (MAX) * Reverse Current is not Generated when in Power Off State * Deglitched Open-Drain Over-Current Flag Output ( OC ) ORDERING INFORMATION Ordering Number US3076XG-S08-R US3176XG-S08-R US3276XG-S08-R US3376XG-S08-R Package SOP-8 SOP-8 SOP-8 SOP-8 www.unisonic.com.tw Copyright © 2010 Unisonic Technologies Co., Ltd Packing Tape Reel Tape Reel Tape Reel Tape Reel 1 of 8 QW-R502-424.b US3076-US3376 Preliminary PIN CONFIGURATION GND 1 CMOS IC 8 OC1 IN 2 7 OUT1 EN1(EN1) 3 6 OUT2 EN2(EN2) 4 5 OC2 PIN DESCRIPTION PIN NO. 1 PIN NAME GND 2 IN 3 EN1(EN1) 4 EN2(EN2) 5 OC2 6 OUT2 7 OUT1 8 OC1 DESCRIPTION Ground Input Supply: Output MOSFET Drain, which also supplies IC's internal circuitry. Connect to positive supply. Enable: Logic level enable input of switch 1. Make sure EN pin never floating. Enable: Logic level enable input of switch 2. Make sure EN pin never floating. Over-Current: Open-Drain OC output of switch 2. Switch Output: Output MOSFET Source of switch 2. Typically connect to switched side of load. Switch Output: Output MOSFET Source of switch 1. Typically connect to switched side of load. Over-Current: Open-Drain OC output of switch 1. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 8 QW-R502-424.b US3076-US3376 Preliminary CMOS IC BLOCK DIAGRAM UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 8 QW-R502-424.b US3076-US3376 Preliminary CMOS IC ABSOLUTE MAXIMUM RATING PARAMETER SYMBOL RATINGS UNIT Supply Voltage VIN 6 V Output Voltage VOUT 6 V Output Current IOUT Internally Limited A Enable Input VEN -0.3 ~ 6 V Storage Temperature TSTG -65~ +150 ℃ 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. OPERATING RATINGS PARAMETER Supply Voltage Ambient Operating Temperature SYMBOL VIN TOPR RATINGS +3 ~ +5.5 -40~ +85 UNIT V °C ELECTRICAL CHARACTERISTICS (VIN=5V, CIN=1µF, COUT=1µF, RL=10Ω,TA=25°C, Unless otherwise specified) PARAMETER SYMBOL TEST CONDITIONS Input Voltage VIN US3376, IOUT = 1.5A US3276, IOUT = 1.0A Output MOS RDS(ON) US3176, IOUT = 0.5A US3076, IOUT = 0.3A Supply Current IIN Output Turn-on Rising Time RL=10Ω, 90% Settling US3376 ITHD(LIMIT) US3276 Current Limit Threshold VOUT=4V US3176 US3076 US3376 VOUT=0V, US3276 Short-circuit Current ISC 2.7V<VIN<5.5 V US3176 US3076 EN Input Threshold Shutdown Supply Current Output Leakage Current VIN Under Voltage Lockout VIN Under Voltage Hysteresis Thermal Limit Thermal Limit Hysteresis ISHDN IO(LEAK) OC assertion or deassertion OC Output Low Voltage IOC = 5mA,VIN =2.7V OC Off-State Current VOC = 5V www.unisonic.com.tw 1.5 1.1 0.7 0.5 0.2 0.2 0.2 0.2 1.2 TYP MAX UNIT 5.5 V 87 103 mΩ 90 400 2 1.5 1 0.75 1.3 1 0.67 0. 5 1.6 150 µA µs A A A A A A A A V µA µA V mV °C °C EN=”0”, VOUT=0V OC Deglitch UNISONIC TECHNOLOGIES CO., LTD MIN 2.7 2.1 2.3 200 135 20 5 9 2.8 2.1 1.4 1.7 1.9 1.4 1 0.7 2 1 1 2.65 15 ms 0.2 V 1 µA 4 of 8 QW-R502-424.b US3076-US3376 Preliminary CMOS IC TEST CIRCUIT VOUT IOUT Device Under Test OUT COUT RL CL IL Current Probe UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 8 QW-R502-424.b US3076-US3376 Preliminary CMOS IC TIMING DIAGRAMS UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 6 of 8 QW-R502-424.b US3076-US3376 Preliminary CMOS IC TYPICAL APPLICATION CIRCUIT Power Supply 2.7V ～ 5.5V IN 1μF OC1 OC2 OUT1 0.1μF EN1(EN1) EN1(EN1) Load OUT2 Load 0.1μF UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 22μF 22μF 7 of 8 QW-R502-424.b US3076-US3376 Preliminary CMOS IC FUNCTIONAL DESCRIPTION Input and Output IN pin (Input) is the power supply connection to the logic circuitry and the drain of the output MOSFET. OUT pin (Output) is the source of the output MOSFET. Current flows through the switch from input to output toward the load in a typical application. Both OUT pins must be connected together to the load. Thermal Shutdown Thermal shutdown is designed to prevent this device from being damaged due to excessive power dissipation. It is used to turn off the output MOSFET when the if the temperature is higher than135°C, 20°C of hysteresis prevents the switch turn on until the die temperature drops to 115°C. Thermal shutdown circuit functions only when the switch is enabled. Under-Voltage Lockout UVLO (Under Voltage Lockout) turns off the MOSFET switch once the input voltage falls below 2.3V (TYP.) and if the input voltage exceeds 2.5V (TYP.), the switch will be turned on. UVLO detection functions only when the switch is enabled. Current Limiting The current limit value is fixed internally, typically 2A, 1.5A, 1A, 0.75A for US3376/ US3276/ US3176/ US3076 respectively. There is foldback of current limit When VOUT is less than 1.5V, there is foldback of current limit. OC Function The OC open-drain output is asserted (active low) when an over-current or over-temperature shutdown condition is encountered after a 9-ms deglitch timeout. The output remains asserted until the over current or over temperature condition is removed. APPLICATION INFORMATION Supply Filtering To avoid supply transients, 1μF bypass capacitor is strongly recommended to located between IN to GND. Without a bypass capacitor, an output short may cause sufficient ringing on the input (from supply lead inductance) to damage internal control circuitry. Input transients value must be not higher than the absolute maximum supply voltage (VIN max = 6V) even for a short duration. EN, the Enable Input The enable pin, EN, must be driven logic high or logic low for a clearly defined input. The input is not allowed to float, or unpredictable operation may be occurs. EN should not be allowed to go negative with respect to GND. 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 8 of 8 QW-R502-424.b