UNISONIC TECHNOLOGIES CO., LTD US16855 Preliminary CMOS IC DUAL HIGH-SIDE SWITCH FOR USB APPLICATION DESCRIPTION The UTC US16855 is a dual channel power switch with independent enable and flag functions optimized for bus-powered Universal Serial Bus (USB) and self-powered applications. This product satisfies USB voltage drop requirement with soft start which eliminates the momentary voltage drop on the upstream port that may occur. In addition, the UTC US16855 is equipped with over-temperature and over-current detectors and each flag output is available to indicate fault conditions independently to the USB controller. The UTC US16855 is available in active-high versions in 8-pin SOP package. SOP-8 FEATURES * 4V ~ 5.5V operating range * Two P-channel power MOSFET control switch * Over-current protection * Under-voltage lockout circuit * Thermal shutdown circuit * Soft-start circuit * Flag indicates fault conditions ORDERING INFORMATION Ordering Number Lead Free Halogen Free US16855L-S08-R US16855G-S08-R US16855L-S08-T US16855G-S08-T Note: xx: Output Voltage, refer to Marking Information. US16855G-xx-S08-R Package Packing SOP-8 SOP-8 Tape Reel Tube (1)Packing Type (1) R: Tape Reel, T: Tube (2)Package Type (2) S08: SOP-8 (3)Output Voltage Code (3) xx: Refer to Marking Information (4)Halogen Free (4) Halogen Free, L: Lead Free www.unisonic.com.tw Copyright © 2011 Unisonic Technologies Co., Ltd 1 of 8 QW-R502-558.a US16855 Preliminary PIN CONFIGURATION PIN DESCRIPTION PIN NO. 1, 4 2, 3 6 7 8, 5 PIN NAME CTL1/CTL2 FLG1/FLG2 GND IN OUT1/OUT2 DESCRIPTION Control : TTL Input Over Current Detect Flag : Active-L, Nch open-drain Ground Power Supply : Source of MOSFET Output of Switch : Drain of MOSFET DESCRIPTION of UTC US16855 FUNCTION CTL Input Logic “H” active CMOS IC Switch Operation with Over-Current Detect Switch Off regardless of CTL Input TRUTH TABLE (H: High, L: Low, ON: Turn on, OFF: Turn off, X: H or L) CTL1 H H L L H H X X FLG1 H H H H L H L L OUT1 ON ON OFF OFF OFF ON OFF OFF CTL2 H L H L H H X X FLG2 H H H H H L L L UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw OUT2 ON OFF ON OFF ON OFF OFF OFF Operating mode Normal mode Only OUT1 is ON Only OUT2 is ON Standby mode Only OUT1 is over-current detect Only OUT2 is over-current detect TSD mode UVLO mode 2 of 8 QW-R502-558.a US16855 Preliminary CMOS IC BLOCK DIAGRAM CTL1 1 2 FLG1 8 OUT1 7 IN 5 OUT2 3 FLG2 FLAG LOGIC Control Gate Control Current Limit GND UVLO 6 Thermal Shutdown Current Limit Gate Control CTL2 4 Control UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw FLAG LOGIC 3 of 8 QW-R502-558.a US16855 Preliminary CMOS IC ABSOLUTE MAXIMUM RATING (TA=25°C, Unless otherwise specified) PARAMETER Input Voltage Flag Voltage Control Input Voltage Output Voltage Flag Current Output Current SYMBOL VIN VFLG VCTL VOUT IFLG DC UNIT V V V V mA +0.5 –0.1 VIN= VCTL=5 V A Pulse Width ≤100μs Single Pulse +3 Power Dissipation PD 300 mW Operating Temperature TA –40 ~ +85 °C Storage Temperature TSTG –55 ~ +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. The thermal shutdown circuit (operating temperature is more than 150 °C typ.) builds in this product. IOUT RATINGS –0.3 ~ +6 –0.3 ~ +6 –0.3 ~ +6 VIN+ 0.3 50 RECOMMENDED OPERATING RANGE PARAMETER SYMBOL VIN TA Input Voltage Operating Temperature RATINGS +4 ~ +5.5 0 ~ +70 UNIT V °C ELECTRICAL CHARACTERISTICS (TA = +25°C, VIN = +5V, Unless otherwise specified) PARAMETER DC CHARACTERISTICS Circuit Current SYMBOL IDD Low-level Input Voltage High-level Input Voltage VIL VIH Input Current of CTL pin ICTL Output MOSFET On Resistance Output Leak Current Over Current Detect Threshold Flag Output Resistance Flag Leak Current Operating Voltage of Under Voltage Locked Out Circuit AC CHARACTERISTICS Output Transition Rising Time Output Transition Falling Time Over Current Detect Delay Time CTL Input Low-Level Time RON IO LEAK ITH RONF IO LEAK F VUVLO tRISE tFALL tOVER tCTL TEST CONDITIONS VCTL= 0V (both pin 1 & pin 4), OUT = open VCTL= VIN, OUT = open CTL Pin CTL Pin VCTL= 0V VCTL= VIN TA= 0 ~ +70 °C, IOUT= 500 mA TA= 0 ~ +70 °C IL= 10 mA VFLAG= 5 V VIN: Up VIN: Down Hysteresis RL= 10Ω each output RL= 10Ω each output CTL : H→L→H UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw MIN TYP MAX 1 5 1 1.5 1.0 0.01 0.01 100 1 1 130 10 1.25 25 1 2.8 2.6 0.3 2.0 0.6 2.2 2.0 0.1 2.5 5 20 0.9 10 0.01 2.5 2.3 0.2 12 10 20 UNIT μA mA V V μA μA mΩ μA A Ω μA V V V ms μs μs μs 4 of 8 QW-R502-558.a US16855 Preliminary CMOS IC TIMING DIAGRAM Output Transition Rising Time (at ON)/Output Transition Falling Time (at OFF) at the timing of CTL changing “L” to “H”/“H” to “L” for UTC US16855 Over Current Detect Delay Time/CTL Input Low-Level Time for UTC US16855 ITH IOUT VOUT tOVER FLG 90% tCTL CTL 90% 90% Over Current Detect Delay Time/CTL Input Low-Level Time for UTC US16855 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 8 QW-R502-558.a US16855 Preliminary CMOS IC FUNCTION DESCRIPTION UNDER VOLTAGE LOCKED OUT UVLO prevents malfunction of the switch because of voltage variation. When input voltage exceeds 2.5V (typical), the output MOSFET turns on. If input voltage drops below 2.3V (typical), UVLO shuts off the both output MOSFET switches and signals the FLAG. POWER ON AND OFF The UTC US16855 performs a soft-start operation on power application, which is to prevent an over-current or inrush-current from flowing through the switch from IN to OUTX towards to the load, while the high-capacity capacitor is connected to the OUTX. OVER CURRENT DETECT The specification of over current detect is 0.6 ~ 1.25 A (typ. 900mA) in this IC. (500 mA max. in USB standard) This function is that flag-pin turns to Low-level and reports to the USB controller when over current is detected. At this time, output of IC is operated as followed. Output turns to off, and isn't based on the state of CTL-pin. When CTL-pin turns to non-active, FLG-pin returns to High-level and Output-pin turn to OFF-state. Immediately the controller should be inputted non-active level to CTL-pin after detecting FLG = “L” not to reach to the state of thermal shutdown. Then, in the case of FLG-pin is High-level and CTL-pin is active level, Output-pin turns to ON-state. To prevent from detecting wrongly the current to the moment, over current detect delay time is set up. This delay time is 10 ms (typ.). 5V IN (Input) GND 5V Flg (Output) GND 5V CTL (Input) GND 5V OUT (Output) GND Over Current detect threshold IOUT Over current Detect UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 6 of 8 QW-R502-558.a US16855 Preliminary CMOS IC FUNCTION DESCRIPTION(Cont.) THERMAL SHUTDOWN The UTC US16855 is internally protected against excessive power dissipation by thermal shutdown protection circuit. If device junction temperature rise above approximately 150℃, both switches are turned off, both fault FLAG outputs are activated, and they goes low. Hysteresis ensures that both switches turned off by thermal shutdown will not be turned on again until the die temperature is reduced to 145℃. When the thermal shutdown circuit is activated, the output pins are in the OFF status. However, the UTC US16855 enters the standby status when CTL pins are all inactive. 5V IN (Input) GND 5V OUT (Output) Stand-by Non-stand-by GND 5V Flg (Output) GND 5V CTL (Input) Tch GND Thermal shutdown operating temperature (up) Thermal shutdown operating temperature (down) TEST CIRCUIT UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 7 of 8 QW-R502-558.a US16855 Preliminary CMOS IC TYPICAL APPLICATION CIRCUIT 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-R502-558.a