UNISONIC TECHNOLOGIES CO., LTD US2075C Preliminary CMOS IC DUAL-CHANNEL POWER DISTRIBUTION CONTROL SWITCH FOR USB DESCRIPTION The UTC US2075C 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 US2075C is equipped with over-temperature and over-current detectors, each flag output is available to indicate fault conditions independently to the USB controller. The UTC US2075C is available in active-high versions. Lead-free: US2075CL Halogen-free: US2075CG FEATURES * 100 μA MAX operating current * 5μA MAX standby current * 3.5V ~ 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 Normal US2075C-S08-R Ordering Number Lead Free Plating US2075CL-S08-R www.unisonic.com.tw Copyright © 2009 Unisonic Technologies Co., Ltd Halogen Free US2075CG-S08-R Package Packing SOP-8 Tape Reel 1 of 10 QW-R502-255,b US2075C Preliminary CMOS IC PIN CONFIGURATION CTL1 1 8 OUT1 FLAG1 2 7 IN UTC US2075C 3 6 GND CTL2 4 5 OUT2 PIN DESCRIPTION PIN NO 1 PIN NAME CTL1 2 FLAG1 3 FLAG2 4 5 6 7 8 CTL2 OUT2 GND IN OUT1 FLAG2 DESCRIPTION Switch1Control Input: Logic-compatible, active-high. TTL input Fault Detection Flag 1 (OUTPUT): Active-low. N-ch open-drain. Indicates over-current, thermal shutdown, or UVLO conditions Fault Detection Flag 2 (OUTPUT): Active-low. N-ch open-drain. Indicates over-current, thermal shutdown, or UVLO conditions Switch2 Control Input: Logic-compatible, active-high. TTL input Switch2 Output: Drain of MOSFET for output. Usually, connected to Load Ground Power Input: Source of MOSFET for output. Power supply to Internal circuit Switch1 Output: Drain of MOSFET for output. Usually, connected to Load TRUTH TABLE (H: High, L: Low, ON: Turn on, OFF: Turn off, X: H or L) CTL1 (IN) H H L L H H X X FLAG1 (OUT) H H H H L H L L OUT1 (OUT) ON ON OFF OFF ON ON OFF OFF CTL2 (IN) H L H L H H X X UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw FLAG2 (OUT) H H H H H L L L OUT2 (OUT) ON OFF ON OFF ON ON OFF OFF Operation Mode Normal Operation Only OUT1 is ON. Only OUT2 is ON. Standby Mode Over current Detection Only for OUT1 Over current Detection Only for OUT2 Thermal Shutdown Circuit Operation Under voltage Lockout Circuit Operation 2 of 10 QW-R502-255,b US2075C Preliminary CMOS IC BLOCK DIAGRAM CTL1 1 2 FLAG1 8 OUT1 7 IN 5 OUT2 3 FLAG2 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 10 QW-R502-255,b US2075C Preliminary CMOS IC ABSOLUTE MAXIMUM RATINGS (Ta=25°С) PARAMETER SYMBOL RATINGS UNIT Input Voltage VIN -0.3 ~ +6 V Flag Voltage VFLAG -0.3 ~ +6 V Flag Current IFLAG 50 mA Output Voltage VOUT VIN+0.3 V Output Current IOUT -0.1 ~ +0.5 A Control Input VCTL -0.3 ~ +6 V Total Power Dissipation PD 300 mW Junction Temperature TJ +150 °С Operating Temperature TOPR 0 ~ +85 °С Storage Temperature TSTG -55 ~ +150 °С 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. RECOMMENDED OPERATING RANGE PARAMETER Thermal Shutdown Protection SYMBOL TSHDN TEST CONDITIONS Temperature Rising Temperature Hysteresis TYP 150 5 MAX 10 UNIT °С °С DC ELECTRICAL CHARACTERISTICS (VIN=+5V, TOPR=+25°С, Unless otherwise specified) PARAMETER Input Voltage CTL Voltage, Low CTL Voltage, High SYMBOL TEST CONDITIONS VIN VIL CTL Pin (Note) VIH CTL Pin (Note) VIN=Increasing Under-Voltage Lockout VUVLO VIN=Decreasing Hysteresis Voltage VCTL = VIN, ISW_ON VOUT1=VOUT2=Open Supply Current VCTL = GND, ISW_OFF VOUT1=VOUT2=Open Output Leakage Current IO(LEAK) VCTL = GND Flag Leakage Current IF(LEAK) VFLAG=5V Current Limit ILIMIT Ta=0~80°С Flag Output Resistance ROUT IL=10mA Output MOSFET on-Resistance RON IOUT=500mA Note: ON is CTL>2.0V and OFF is CTL<1.0V. MIN MIN 3.5 TYP 5 MAX 5.5 1.0 2.0 2.2 2.0 0.05 2.5 2.3 2.8 2.6 0.25 UNIT V V V V V V 100 μA 1 5 μA 0.1 0.9 10 105 10 1 1.25 20 145 μA μA A Ω mΩ MAX 8 10 UNIT ms μs μs ms 0.6 AC ELECTRICAL CHARACTERISTICS PARAMETER SYMBOL TEST CONDITIONS Output Turn-on Rise Time tR RL=10Ω, Per Output Output Turn-off Fall Time tF RL=10Ω, Per Output Over-Current Detection Delay Time tDELAY Over-Current Detection Output Rise Time tDECR RL=10Ω, Per Output UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw MIN 2.5 TYP 5 2.5 20 5 8 4 of 10 QW-R502-255,b US2075C Preliminary CMOS IC TEST CIRCUIT VIN 1M 1M 10K CIN 10K 2 3 FLAG1 7 OUT1 8 FLAG2 UTC US2075C S2 IN 1 CTL1 4 CTL2 VOUT1 CL1 VOUT2 S1 OUT2 GND 6 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw RL1 5 CL2 RL2 5 of 10 QW-R502-255,b US2075C Preliminary CMOS IC TIMING DIAGRAM VCTL ILIMIT IOUT VOUT tDELAY VFLAG tDECR 90% UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 6 of 10 QW-R502-255,b US2075C Preliminary CMOS IC FUNCTIONAL DESCRIPTION The UTC US2075C is dual P-Channel switch with active-low and active-high enable inputs, respectively. Fault conditions (such as UVLO, thermal shutdown and over-current) that appear will turn off the power switch, and the FLAG pin will go low. Of course, the two internal FLAG circuits also operate respectively. INPUT AND OUTPUT IN (Input) is the power supply connection to the control circuitry and the source of the output MOSFET. OUTX (Output) is the connection to the drain of the output MOSFET. In a typical application circuit, current flows through the switch from IN to OUTX towards the load. If VOUT is greater than VIN when the switch is enabled, current will flow from OUTX to IN since the MOSFET is bi-directional. POWER ON AND OFF The UTC US2075C 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. THERMAL SHUTDOWN The UTC US2075C is internally protected against excessive power dissipation by thermal shutdown protection circuit. If device junction temperature rise above approximately 150°С, 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°С. When the thermal shutdown circuit is activated, the output pins are in the OFF status. However, the UTC US2075C enters the standby status when CTL pins are all inactive. CURRENT LIMIT The current limit circuit is designed to protect the output MOSFET, the load and the IC supply from damage caused by excessive currents. The current limit threshold is preset internally, If an over-current is detected, the IC performs a slow-start operation again, it is assumed that output is short circuit, and FLAG pin will go low, FLAG output is available to indicate fault conditions independently to the USB controller. UNDER-VOLTAGE LOCKOUT UVLO prevents the output MOSFET switch from turning on until input voltage exceeds 2.5V (typical). If input voltage drops below 2.3V (typical), UVLO shuts off the both output MOSFET switches and signals the FLAG. FAULT FLAG The fault FLAG is an output with open-drain of N-channel. The fault FLAG is pulled down when any of the conditions such as under-voltage, current limit and thermal shutdown. In a typical application circuit, the FALG pin has a pull-up resistor of 10kΩ to input voltage. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 7 of 10 QW-R502-255,b US2075C Preliminary CMOS IC TYPICAL APPLICATION CIRCUIT 5V 3.3V VBUS 1μF 10kΩ 10kΩ D+ D- 2 IN FLAG1 7 GND Over current 3 FLAG2 UTC US2075C USB Controller 1 CTL1 4 CTL2 150μF OUT1 8 VBUS Enable disable D- USB Connector D+ OUT2 5 GND D+ 6 D- USB Connector 150μF GND TWO USB output ports controllable by USB controller UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 8 of 10 QW-R502-255,b US2075C CMOS IC Supply Current, ISW (µA) Output On-Resistance, RON (mΩ) TYPICAL CHARACTERISTICS Over-Current Limit vs. Input Voltage CTL-Pin Threshold Voltage (V) 1 Over-Current Limit, ILIMIT (A) Preliminary 0.98 0.96 0.94 0.92 0.9 0.88 0.86 4 4.5 5 5.5 Input Voltage, VIN (V) 6 CTL-Pin Threshold Voltage vs. Input Voltage 1.65 VIH 1.6 1.55 VIL 1.5 1.45 1.4 4 4.5 5 5.5 Input Voltage, VIN (V) 6 Turn-On Response (VIN vs. VOUT) Turn-Off Response (VIN vs. VOUT) T T VIN (5V/Div) VIN (5V/Div) VIN=5V, CIN=1µF, COUT=1µF, RL=10Ω VOUT (2V/Div) VIN=5V, CIN=1µF, COUT=1µF, RL=10Ω VOUT (2V/Div) (2ms/Div) UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw (10ms/Div) 9 of 10 QW-R502-255,b US2075C Preliminary CMOS IC TYPICAL CHARACTERISTICS(Cont.) 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 10 of 10 QW-R502-255,b