AIC1525-0CS

AIC1525 USB High-Side Power Switch n FEATURES l l l l l l l l l l l 70mΩ (5V Input) High-Side MOSFET Switch. 500mA Continuous Load Current per Channel. 75µA Typical On-State Supply Current. 1µA Typical Off-State Supply Current. Current-Limit / Short Circuit Protection. Thermal Shutdown Protection under Overcurrent Condition. Undervoltage Lockout Ensures that Switch is off at Start Up. Output can be Forced Higher than Input (Off-State). Open-Drain Fault Flag. Slow Turn ON and Fast Turn OFF. Enable Active-High or Active-Low. n DESCRIPTION The AIC1525 is an integrated high-side power switch for self-powered and bus-powered Universal Serial Bus (USB) applications. The high-side switch is a MOSFET with 70mΩ RDS(ON), which meets USB voltage drop requirements for maximum transmission wire length. Multi-purpose open-drain fault flag output indicates over-current limiting, thermal shutdown, or undervoltage lockout. Output current is typically limited to 0.85A below the 5A safety requirement, and thermal shutdown function shuts the switch off to prevent damage under overcurrent condition. n APPLICATIONS • USB Power Management. l l Hot Plug-In Power Supplies. Battery-Charger Circuit. n TYPICAL APPLICATION CIRCUIT VCC 5.0V 33µ F 4.50 V to 5.25V Upstream VBUS 100mA max VBUS D+ DGND +µ 1F C IN 10K Guaranteed minimum output rise time limits inrush current during hot plug-in, minimizing EMI and preventing the voltage at upstream port from dropping excessively. AI C17 2 2 IN OUT USB Controll er VIN ON/OFF OVERCURRENT GND CTL FLG GND NC OUT IN OUT IN 0.1 µF + 33µ F Ferrite Bead VBUS D+ DGND + GND 10 µF C OUT 0.01µ F * AIC1525 DATA * 33 µF, 16V Tantalum, or 100µF, 10V Electrolytic Bold line indicate high- current traces DATA One-Port Self-Powered Hub Analog Integrations Corporation www.analog.com.tw DS-1525-00 May 16, 00 TEL: 886-3-5772500 4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC FAX: 886-3-5772510 1 AIC1525 n ORDERING INFORMATION AIC1525-XXX PACKAGE TYPE N: PLASTIC DIP S: SMALL OUTLINE TEMPERATURE RANGE C: 0° C~70°C ORDER NUMBER AIC1525-0CN AIC1525-1CN (PLASTIC DIP) AIC1525-0CS AIC1525-1CS (PLASTIC SO) PIN CONFIGURATION TOP VIEW CTL FLG GND NC 1 2 3 4 8 OUT 7 IN 6 OUT 5 IN CONTROL POLARITY 0: ACTIVE LOW 1: ACTIVE HIGH n ABSOLUTE MAXIMUM RATINGS Supply Voltage (V IN) .......................................................… … … … .......… … ........... 7.0V Fault Flag Voltage (V FLG) ........................................................… … … … … … ..… … ...... 7.0V Fault Flag Current (IFLG) ...................… … … .....................… … … ...............… ........ 50mA ..............… … … … ..… … … … … .… ............... -20°C~80°C ....................................… … … .................. -65°C ~ 150°C Control Input (V CTL) ......................................................… … … … … ....… … ..… . -0.3V ~15V Operating Temperature Range Storage Temperature Range n TEST CIRCUIT 10K VCC +5V ON C TL OFF FLG OUT IN OUT IN AIC1525 0.1µF 10Ω GND NC 2 AIC1525 n ELECTRICAL CHARACTERISTICS (V specified.) PARAMETERS Supply Current Control Input Voltage IN= 5V, Ta=25° C, unless otherwise CONDITIONS VCTL =Logic “0” , OUT=Open VCTL =Logic “1” , OUT=Open VCTL =Logic “0” VCTL =Logic “1” MIN. TYP. 0.75 75 1.7 MAX. 5 100 0.8 UNIT µA V 2.4 2.0 0.01 0.01 1 70 100 1 1 pF mΩ µS 4000 20 20 10 µS µS µS µA A °C 25 40 1 µA V Ω µA Control Input Current VCTL =Logic “0” VCTL =Logic “1” 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 Overtemperature Shutdown Threshold Error Flag Output Resistance Error Flag Off Current UVLO Threshold TJ Increasing TJ Decreasing VIN = 5V , IL =10 mA VIN = 3.3V , IL =10mA VFLG = 5V VIN Increasing VIN Decreasing 0.7 RL = 10Ω each Output RL = 10Ω each Output RL = 10Ω each Output RL = 10Ω each Output 100 1000 0.8 0.7 1.0 135 125 10 15 0.01 2.6 2.4 1.25 3 AIC1525 n BLOCK DIAGRAM OUT FLG POWER N-MOSFET DRIVER CTL CHARGE PUMP CURRENT LIMIT CS GND THERMAL SHUTDOWN UVLO IN n TYPICAL 70 PERFORMANCE CHARACTERISTICS Output ON Resistance vs. Supply Voltage Switch- ON Resistance (mΩ ) 69 68 67 66 65 64 2 3 Supply Voltage (V) 4 5 6 7 On-Resistance vs. Temperature 90 ON Resistance (mΩ ) 80 70 60 50 -60 -40 -20 0 20 40 60 80 100 120 Temperature (° C) 4 AIC1525 O N-State Supply Current vs. Supply Voltage 2.8 100 UVLO Threshold Voltage vs. Temperature Switch-ON Supply Current (µA) UVLO Threshold Voltage (V) 2.7 90 2.6 2.5 rising 80 70 2.4 2.3 2.2 falling 60 50 2 3 4 5 6 7 -40 -20 0 Supply Voltage (V) Temperature (°C) 20 40 60 80 100 120 n TYPICAL 95 90 85 80 75 70 65 60 PERFORMANCE CHARACTERISTICS (Continued) OFF-State Supply Current vs. Temperature 10 1 ON-State Supply Current vs. Temperature Supply Current (µA) -40 -20 0 20 40 60 80 100 120 Supply Current (µA) 10 2 10 3 Temperature (° C) 10 4 -40 -20 0 Temperature (°C) 20 40 60 80 100 120 OFF State Current vs. Supply Voltage 0.10 CTL Threshold Voltage vs. Supply Voltage 2.8 2.6 0.08 2.4 Supply current (µA) Threshold voltage (V) 2.2 2.0 1.8 1.6 1.4 1.2 1.0 CTL rising CTL falling 0.06 0.04 0.02 0 3 4 5 6 7 8 0.8 2 3 4 5 6 7 Supply Voltage (V) Supply Voltage (V) 5 AIC1525 Output Rise Time vs. Temperature 1.40 0.54 0.52 Output fall Time vs. Temperature Turn-ON Resistance (mS) 1.35 Turn-Off Fall Time (µS) -40 -20 0 20 40 60 80 100 120 1.30 1.25 1.20 1.15 1.10 1.05 0.50 0.48 0.46 0.44 0.42 0.40 0.38 -40 -20 0 20 40 60 80 100 120 Temperature (°C) Temperature (° C) 6 AIC1525 TYPICAL PERFORMANCE CHARACTERISTICS (Continued) Current Limit Threshold vs. Temperature 1.15 Output Threshold (A) 1.00 0.95 Current Limit Threshold 0.90 Short Circuit Current Limit 0.85 -60 -40 -20 0 20 40 60 80 100 120 140 Temperature (°C) Short Circuit Response Current Limit Response FLG 0.8A FLG Thermal Shutdown IOUT 1A/10mV IOUT 1A/10mV Turn-On/Off Characteristic ( I ) Turn On/Off Characteristic (II) CTL VOUT IOUT OUT 1A/10mV R=10Ω RL=35Ω CL=100 µF 7 AIC1525 n PIN DESCRIPTION PIN 1: CTL - TTL compatible control input. It controls the power switch turnon/turn-off. Active High for AIC1525-1 and active low for AIC1525-0. - An active-low and open-drain fault flag output for power switch. It can indicate current limit if CTL is PIN 3: GND PIN 4: NC PIN 5, 7: IN active. In normal mode operation, it also can indicate thermal shutdown or undervoltage. - Chip power ground. - Not internally connected. - Power supply Input. PIN 2: FLG PIN 6, 8: OUT - MOSFET switch output. n APPLICATION INFORMATIONS l Error Flag An open-drained output of an N-channel MOSFET, the FLG output is pulled low to signal the following fault conditions: input undervoltage, output current limit, and thermal shutdown. control supply transients. Without a bypass capacitor, an output short may cause sufficient ringing on the input (from supply lead inductance) to damage internal control circuitry. l Transient Droop Requirements l Current Limit The current limit threshold is preset internally. It protects the output MOSFET switches from damage due to undesirable short circuit conditions or excess inrush current often encountered during hot plug-in. The low limit of the current limit threshold of the AIC1525 allows a minimum current of 0.5A through the MOSFET switches. A current limit condition will signal the error flag. USB support dynamic attachment (hot plug-in) of peripherals. A current surge is caused by the input capacitance of downstream device. Ferrite beads are recommended in series with all power and ground connector pins. Ferrite beads reduce EMI and limit the inrush current during hot-attachment by filtering high-frequency signals. l Short Circuit Transient Bulk capacitance provides the short-term transient current needed during a hot-attachment event. With a 33µF, 16V tantalum or 100µF, 10V electrolytic capacitor mounted close to downstream connector should provide transient drop protection. l Thermal Shutdown When the chip temperature exceeds 135°C, the thermal shutdown function turns off MOSFET switch and signals the error flag. A hysteresis of 10°C prevents the MOSFET from turning back on until the chip temperature drops to below 125°C. l Printed Circuit Layout The power circuitry of USB printed circuit boards requires a customized layout to maximize thermal dissipation and to minimize voltage drop and EMI. l Supply Filtering A 0.1µF to 1µF bypass capacitor from IN to GND, located near the device, is strongly recommended to 8 AIC1525 VCC 5.0V 33uF 4.50 V to 5.25V Upstream VBUS 100mA max VBUS D+ DGND +µ 1F C IN 10K AIC1722 IN OUT Ferrite Bead CTL FLG GND NC OUT IN OUT IN 0.1 µF DATA + 33µ F 0.01µ F VBUS D+ DGND USB Controll er VIN ON/OFF OVERCURRENT GND + GND 10 µF C OUT * AIC1525 DATA * 33 µF, 16V Tantalum, or 100µF, 10V Electrolytic Bold line indicate high- current traces One-Port Self-Powered Hub n PHYSICAL DIMENSIONS l 8 LEAD PLASTIC SO (unit: mm) D SYMBOL A H E MIN 1.35 0.10 0.33 0.19 4.80 3.80 MAX 1.75 0.25 0.51 0.25 5.00 4.00 1.27(TYP) A1 B C e A C A1 D E e H L 5.80 0.40 6.20 1.27 B L 9 AIC1525 l 8 LEAD PLASTIC DIP (unit: mm) D SYMBOL A1 E1 MIN 0.381 2.92 0.35 0.20 9.01 7.62 6.09 MAX — 4.96 0.56 0.36 10.16 8.26 7.12 A2 b E C D E C A2 A1 L E1 eB b e e eB L — 2.54 (TYP) 10.92 3.81 2.92 10