UNISONIC TECHNOLOGIES CO., LTD US2175 CMOS IC DUAL USB HIGH-SIDE POWER SWITCH DESCRIPTION The US2175 is a high-side power switch with two channels. It particularly designed for the Universal Serial Bus (USB) including self-powered and bus-powered types. The RDS(ON) of the MOSFET switch is as low as 110mΩ. The US2175 incorporates protective functions, such as overcurrent protection, thermal shutdown and UVLO (UnderVoltage Lockout) protection circuits. The thermal shutdown function provides individual control for each switch. An open-drain fault flag playing a role as the output of an N-channel is also included. Once any error occurs the fault flag will be in active. The US2175 can be applied in hot plug in power supplies and battery charger circuits as well. SOP-8 FEATURES * Open-Drain Fault Flag. * High-Side MOSFET Switch with 5V Input Voltage * 110mΩ RDS(ON) Meets USB Voltage Drop Requirements for Maximum Transmission Wire Length * Load Current: 1A * Output Can be Forced Higher Than Input (Off-State) * On-State Supply Current: 65μA (TYP.) * Off-State Supply Current:.1μA (TYP.) * Current-Limit / Short Circuit Protection and Thermal Shutdown Protection Under Overcurrent Condition * UVLO Makes the Switch OFF at Start UP * With Slow Turn ON and Fast Turn OFF * Enable Active-Low or Active-High ORDERING INFORMATION Ordering Number Lead Free Halogen Free US2175XL-S08-R US2175XG-S08-R US2175XL-S08-R (1)Packing Type Package Packing SOP-8 Tape Reel (1) R: Tape Reel (2)Package Type (2) S08: SOP-8 (3)Lead Free (3) L: Lead Free, G:Halogen Free (4)Logic Level Enable Pin (4) L: Active Low, H: Active High www.unisonic.com.tw Copyright © 2013 Unisonic Technologies Co., Ltd 1 of 10 QW-R502-403.C US2175 CMOS IC PIN CONFIGURATION CTL(1) 1 8 OUT(1) FLG(1) 2 7 IN FLG(2) 3 6 GND CTL(2) 4 5 OUT(2) PIN DESCRIPTION PIN NO. 1 2 3 4 5 6 7 8 PIN NAME DESCRIPTION CTL(1) Switch A Control Input: Logic-Compatible, Active-Low or Active-High. TTL input Fault Detection Flag (1) (OUTPUT): Active-Low. N-ch Open-Drain. Indicates FLG(1) Over-Current, Thermal Shutdown. Fault Detection Flag (2) (OUTPUT): Active-Low. N-ch Open-Drain. Indicates FLG(2) Over-Current, Thermal Shutdown. CTL(2) Switch B Control Input: Logic-Compatible, Active-Low or Active-High. TTL Input OUT(2) Switch B Output: Drain of MOSFET for Output. Usually, Connected to Load GND Power Ground. IN Power Supply Input. OUT(1) Switch A Output: Drain of MOSFET for Output. Usually, Connected to Load UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 10 QW-R502-403.C US2175 CMOS IC BLOCK DIAGRAM 2 FLG(1) 8 OUT(1) CTL(1) 1 Charge Pump Gate Control Current Limit OSC. Thermal Shutdown 7 IN UVLO Charge Pump Gate Control CTL(2) Current Limit 4 5 OUT(2) 3 FLG(2) 6 GND UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 10 QW-R502-403.C US2175 CMOS IC ABSOLUTE MAXIMUM RATING PARAMETER SYMBOL RATINGS UNIT Supply Voltage VCC 7 V Control Input Voltage VCTL -0.3~ +6.5 V Fault Flag Voltage VFLG 7 V Power Dissipation (Ta = 25°C) PD 625 mW Junction Temperature TJ +125 °C Ambient Operating Temperature TOPR -40 ~ +85 °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 Junction to Ambient (no Heatsink) SYMBOL θJA RATINGS 160 UNIT °C/W ELECTRICAL CHARACTERISTICS (VIN=5V, TA=25°C, unless otherwise specified) PARAMETER Supply Current Control Input Voltage Control Input Current Control Input Capacitance Output MOSFET Resistance Output Turn-On Rise Delay Output Turn-On Rise Time Output Turn-Off Delay Output Turn-Off Fall Time Output Leakage Current Current Limit Threshold Short Current SYMBOL IOFF ION VIL VIH IIL IIH CI RON TD_ON TON TD_OFF TOFF II(LEAK) ILIMIT ISC Over Temperature Shutdown Threshold TSD Error Flag Output Resistance RFLG Error Flag Off Current UVLO Threshold IFLG_OFF VUVLO UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw TEST CONDITIONS OUT=Open OUT=Open VCTL=Logic “0” VCTL=Logic “1” VCTL =Logic “0” VCTL =Logic “1” IOUT= 500mA RL=10Ω each Output RL=10Ω each Output RL=10Ω each Output RL=10Ω each Output VOUT=4V VOUT=0V TJ Increasing TJ Decreasing VIN=5V, IL=10mA VIN=3.3V, IL=10mA VFLG=5V VIN Increasing VIN Decreasing MIN 2.4 TYP MAX UNIT 1 5 µA 65 100 µA 0.8 V V 0.01 1 µA 0.01 1 µA 1 pF 110 150 mΩ 40 µS 500 µS 1 20 µS 1 20 µS 0.5 10 µA 1.3 2 A 1 A 135 °C 115 °C 15 80 Ω 20 100 Ω 0.01 1 µA 2.6 V 2.4 V 4 of 10 QW-R502-403.C US2175 CMOS IC TEST CIRCUITS RFG (1) VIN CIN + (2) IN FLG CTL VOUT VCE VFLG S1 COUT GND VOUT IOUT A + RL IL VRDS(ON) V (3) CIN + VOUT IN VIN CTL VCE RFG (4) IOUT + COUT VIN CIN IN FLG VFLG VOUT CTL FLG GND + VCE VOUT GND COUT + RL IL (5) Note: Above test circuits reflected the graphs shown on “Typical Characteristics” are as follows: (1) On-State Supply Current vs. Input Voltage & Temperature, Off-State Supply Current vs. Input Voltage & Temperature (2) Flag Trigger & Release Response, Inrush Current at Start-up (3) Ramped Load Response, Short-Current Response at Start-up (4) Thermal Shutdown Response, Turn off Response, Turn on Response (5) Short Circuit Current Response, Ramped Load Response, Thermal Shutdown Response UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 10 QW-R502-403.C US2175 CMOS IC TYPICAL APPLICATION CIRCUIT VCC 5.0V Ferrite Bead 10k 33μF 10k 4.50V ~ 5.25V Upstream VBUS 100mA max VBUS D+ USB Controller LR1116B VBUS IN VIN OUT + US2175 0.01μF ON/OFF CTL(1) OUT(1) Overcurrent FLG(1) IN Overcurrent FLG(2) GND ON CTL(2) OUT(2) 33μF D- USB Port1 GND D+ D- GND 1μF 1μF GND 0.1μF VBUS GND D+ + 0.01μF 33μF D- USB Port2 GND DATA DATA (Two Pair) to USB Controller UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 6 of 10 QW-R502-403.C US2175 CMOS IC APPLICATION INFORMATION Fault Flag The fault flag mainly protects the system from damage caused by such status as thermal shutdown, overcurrent. Current Limit The current limit function prevents both excessive in-rush current caused by the plug-in events and the short-circuit status for MOSFET switches. The current limit threshold is fixed internally, allowing a 1A minimum current to flow through the MOSFET switches. Thermal Shutdown Both thermal shutdown circuits turn both MOSFET switches off if the temperature rises approximately 135°C, at the same time FLG pin becomes active. 10°C of hysteresis ensures the MOSFETs will not turn on again until the chip temperature is reduced to 125°C. Under overcurrent fault conditions, the thermal shutdown will turn off the MOSFET switch which is in this status due to temperature rise, the other keeps its state. Supply Filtering In order to control supply transients, a bypass capacitor placed between IN pin and GND pin is suggested. 0.1μF to 1μF is suitable. Without a bypass capacitor, an output short may cause sufficient ringing on the input (from supply lead inductance) to damage internal control circuitry. Transient Requirements Ferrite beads are recommended in series with all power and ground connector pins to prevent EMI and excessive in-rush current generated from input capacitance of down stream during a hot plug-in event. The USB devices support dynamic attachment (hot plug-in) of peripherals. . Short Circuit Transient A 33μF/16V tantalum or a 100μF/10V electrolytic capacitor located closely to downstream connector for each port is recommended to provide transient protection and a bulk capacitance provides the short-term transient current needed during a hot-attachment event. Printed Circuit Layout To meet the requirements for power circuitry of USB printed circuit boards, maximum thermal consumption and minimum voltage drop and EMI is required. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 7 of 10 QW-R502-403.C US2175 On-State Supply Current, ISON(μA) TYPICAL CHARACTERISTICS On-State Supply Current, ISON(μA) CMOS IC Off-State Supply Current vs. Temperature Off-State Supply Current vs. Input Voltage 0.9 0.05 0.8 0.04 0.7 0.6 0.03 0.5 0.4 0.02 0.3 0.2 0.01 0.1 0 0 3 4 5 Input Voltage, VDD (V) 6 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw -40 -20 0 20 40 60 80 100 120 Temperature (℃) 8 of 10 QW-R502-403.C US2175 CMOS IC TYPICAL CHARACTERISTICS (Cont.) Inrush Current at Start-up VOUT VOUT Flag Trigger & Release Response FLAG RL=0ΩCOUT=100μF VOUT FLAG IOUT IOUT FLAG VOUT IOUT IOUT CTL RL=10ΩCOUT=100μF Turn off Response FLAG COUT=100μF VOUT VOUT Thermal Shutdown Response IOUT CTL RL=10Ω UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 9 of 10 QW-R502-403.C US2175 CMOS IC TYPICAL CHARACTERISTICS (Cont.) Turn on Response RL=10Ω 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-R502-403.C