UNISONIC TECHNOLOGIES CO., LTD US107 Preliminary LINEAR INTEGRATED CIRCUIT POWER DISTRIBUTION SWITCH DESCRIPTION The UTC US107 is a power distribution switch. It is intended for applications such as USB where heavy capacitive loads and short-circuits are likely to be encountered. This family offers multiple devices with fixed current-limit thresholds for applications between 1.2 A, 1.7A and 2.5 A. The RDS(ON) of the MOSFET switch is as low as 70mΩ. OC is open-drain output report over-current or over-temperature event which has typical 9ms deglitch timeout period, also reports output reverse-voltage condition with typical 5ms deglitch timeout period. The UTC US107 incorporates protection circuits including current limiting circuit with foldback function, thermal shutdown circuit designed to prevent catastrophic switch failure due to increasing power dissipation when continuous heavy loads or short circuit occurs. Besides, 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 US107 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, battery-charger circuits. FEATURES * Single power switch family * Operating range: 3.0V~5.5V * 130µA quiescent supply current * 1µA maximum shutdown supply current * 70mΩ high-side MOSFET * 1mS typical rise time * Under voltage lockout * Logic level enable pin, available with Active-high or active-low version * No reverse current when power off * Available with or without output shutdown pull-low resister * Deglitched open-drain over-current flag output ( OC ) * Output reverse-voltage protection ORDERING INFORMATION Ordering Number US107xxG-AF5-R Note: Pin Assignment: O: OUT G: GND OC: OC www.unisonic.com.tw Copyright © 2015 Unisonic Technologies Co., Ltd Package SOT-25 C: CE/ CE Pin Assignment 1 2 3 4 O G OC C 5 I Packing Tape Reel I: IN 1 of 8 QW-R129-004.b US107 Preliminary MARKING US107A U17Ax US107B U17Bx L: Low, H: High US107C U17Cx L: Low, H: High L: Low, H: High PIN CONFIGURATION IN 5 1 2 OUT GND EN (EN) 4 3 OC PIN DESCRIPTION PIN NO. PIN NAME 1 OUT 2 GND 3 OC 4 EN( EN ) 5 IN LINEAR INTEGRATED CIRCUIT DESCRIPTION Switch Output: Output MOSFET Source of switch. Typically connect to switched side of load. Ground Over-Current: Open-Drain OC output. Enable: Logic level enable input. Make sure EN pin never floating. Input Supply: Output MOSFET Drain, which also supplies IC's internal circuitry. Connect to positive supply. BLOCK DIAGRAM IN EN (EN) Output Reverse-Voltage Protection Clock Gate Control UVLO Overcurrent Limiting BandGap Reference CMP Current Sense OUT Shutdown Signal OC Thermal Sense OC Deglitch logic GND UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 8 QW-R129-004.b US107 Preliminary LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATING (TA=25°C, unless otherwise specified) PARAMETER SYMBOL RATINGS UNIT Supply Voltage VIN 6 V Output Voltage VOUT 6 V Output Current IOUT Internally Limited Enable Input VEN -0.3 ~ 6 V Continuous Power Dissipation (Note 2) PD 0.5 W Junction Temperature TJ 150 °C Storage Temperature TSTG -65 ~ +150 °C Notes: 1. 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. 2. Please refer to Minimum Footprint PCB Layout Section. OPERATING RATINGS PARAMETER Supply Voltage Operating Temperature SYMBOL VIN TA RATINGS 3.0 ~ 5.5 -40 ~ +85 UNIT V °C THERMAL DATA PARAMETER Junction to Ambient (Note 2) Junction to Case UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw SYMBOL θJA θJC RATINGS 260 85 UNIT °C/W °C/W 3 of 8 QW-R129-004.b US107 Preliminary LINEAR INTEGRATED CIRCUIT ELECTRICAL CHARACTERISTICS (VIN=5V, CIN=1µF, COUT=1µF, RL=10Ω, TA=25°C) The device is not guaranteed to function outside its operating conditions. Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified. PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Input Voltage Rage VIN 3.0 5.5 V Output MOS RDS(ON) RDS(ON) 70 85 mΩ Supply Current ION 130 190 µA Shutdown Supply Current IOFF 0.1 1 µA VIN=5V 1.4 1.8 ms Output Turn-on Rising Time TON RL=10Ω, 90% Settling 2 2.4 ms VIN=3.3V US107A 2.2 2.5 2.8 A Over Current Trigger Point ILIMIT US107B 1.7 2.0 2.3 A US107C 1.2 1.5 1.8 A US107A, VIN>3.5V and VOUT<1V 1.6 A Fold-Back Current ISC(FB) US107B, VIN>3.5V and VOUT<1V 1.3 A US107C, VIN>3.5V and VOUT<1V 1.0 A EN Input Threshold-High VIH VIH 1.2 V EN Input Threshold-Low VIL VIL 0.6 V Shutdown Pull Low Resistance RPD 300 Ω Output Leakage Current IO(LEAK) EN=”0”, VOUT=0V 0.5 1 µA VIN Under Voltage Lockout VUVLO VIN Increasing 2.2 2.4 2.9 V VIN Under Voltage Hysteresis ∆VUVLO VIN Decreasing 200 mV Thermal Limit TSD 140 °C Thermal Limit Hysteresis ∆TSD 20 °C TD OC Deglitch OC Output Low Voltage OC Off-State Current Output Reverse-Voltage Trigger Point (VOUT-VIN) Output Reverse-Current Trigger Point Output Reverse-Voltage Deglitch Time tIOS Response Time to Short Circuit 15 ms V OC _OFF I OC =2mA 0.4 V I OC_OFF V OC =5V 1 µA VREV OC Assertion or Deassertion VIN=5V IREV TDREV tIOS VIN=5V VIN=5V, See Figure 1,2 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 9 250 350 450 mV 200 400 800 mA 3 5 7 ms 1.5 µs 4 of 8 QW-R129-004.b US107 Preliminary LINEAR INTEGRATED CIRCUIT ELECTRICAL CHARACTERISTICS (Cont.) Note: To exactly identify the short circuit characteristic of IC, avoid the test result interfered by parasitic inductor, output capacitor, and contact resistor. It is necessary to follow the recommendation as follows. Please, 1. Add 1000µF of capacitor between VIN and GND, and close to IC. 2. Remove output capacitor. 3. Shorter the short circuit device wire. 4. Measure output current (IOUT). UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 8 QW-R129-004.b US107 Preliminary LINEAR INTEGRATED CIRCUIT FUNCTIONAL DESCRIPTION Input and Output IN (input) is the power supply connection to the logic circuitry and the drain of the output MOSFET. OUT (output) is the source of the output MOSFET. In a typical application, current flows through the switch from IN to OUT toward the load. Both OUT pins must be connected together to the load. Thermal Shutdown The thermal shutdown circuit is used to prevent damage occurs when the die temperature becomes higher than approximately 140°C. After 20°C of hysteresis, the switch will automatically restart if it enabled. When these devices are disabled or the fault is removed, the output and OC signal will continue to cycle on and off. Undervoltage Lockout UVLO (Under-voltage Lockout) turns off the MOSFET switch once the input voltage falls below 2.2V, and the OC is in active. If the input voltage exceeds approximately 2.4V, the switch will be turned on. Under-voltage detection functions only when the switch is enabled. Over Current Trigger Point The typical over current trigger point of UTC US107 is 2.5A, 2A, 1.5A. There is foldback of current limit when VIN>3.5V and VOUT<1V. Output Reverse-Voltage Protection The output reverse-voltage protection turns off the MOSFET switch whenever the output voltage is higher than the input voltage by 20mV (typ) for 5ms (typ) and the MOSFET switch will turn on when output reverse-voltage condition is removed for 5ms (typ). OC Function The OC open-drain output is asserted (active low) when an over current condition is encountered after a 9ms deglitch timeout. The output remains asserted until the overcurrent condition is removed. Over temperature condition is also reported immediately by OC open-drain output. In addition, OC is also asserted (active low) in output reverse-voltage condition with typical 5ms deglitch timeout period until the output reverse-voltage condition is removed. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 6 of 8 QW-R129-004.b US107 Preliminary LINEAR INTEGRATED CIRCUIT TEST CIRCUIT VOUT IOUT Device Under Test OUT COUT RL CL IL Current Probe TIMING DIAGRAMS tR tF 90% VOUT 90% 10% 10% Output Rise and Fall Times VEN 50% tOFF tON 90% VOUT 10% Switch Delay Times UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 7 of 8 QW-R129-004.b US107 Preliminary LINEAR INTEGRATED CIRCUIT TYPICAL APPLICATION CIRCUIT UTC US107 Power Supply 2.7V to 5.5V IN (Note) OUT Load 0.1µF 1µF 22µF OC ON EN(EN) OFF Note : 1µF of input capacitor is enough in most application cases. If the PCB trace of power rail to IN is long, larger input capacitor is necessary. 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-R129-004.b