AIC1525 USB High-Side Power Switch n FEATURES l l l l l l l l l l l n DESCRIPTION 70m (5V Input) High-Side MOSFET Switch. 500mA Continuous Load Current per Channel. 75A Typical On-State Supply Current. 1A 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. 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 70m 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 Guaranteed minimum output rise time limits inrush current during hot plug-in, minimizing EMI and preventing the voltage at upstream port from dropping excessively. * USB Power Management. l Hot Plug-In Power Supplies. l Battery-Charger Circuit. n TYPICAL APPLICATION CIRCUIT VCC 5.0V 33 F 10K 4.50 V to 5.25V Upstream VBUS 100mA max AI C17 2 2 VBUS IN D+ + 1 F C IN DGND VIN OUT + 10 F C OUT GND Ferrite Bead USB Controll er ON/OFF CTL OUT OVERCURRENT FLG GND NC IN GND DATA * 33 F OUT IN AIC1525 33 F, 16V Tantalum, or 100F, 10V Electrolytic Bold line indicate high- current traces VBUS D+ + 0.01 F D- * GND 0.1 F DATA One-Port Self-Powered Hub Analog Integrations Corporation www.analog.com.tw DS-1525-00 May 16, 00 4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC TEL: 886-3-5772500 FAX: 886-3-5772510 1 AIC1525 n ORDERING INFORMATION ORDER NUMBER AIC1525-XXX PACKAGE TYPE N: PLASTIC DIP S: SMALL OUTLINE TOP VIEW AIC1525-0CN AIC1525-1CN (PLASTIC DIP) TEMPERATURE RANGE C: 0 C~70C CONTROL POLARITY 0: ACTIVE LOW 1: ACTIVE HIGH PIN CONFIGURATION AIC1525-0CS AIC1525-1CS (PLASTIC SO) CTL 1 8 OUT FLG 2 7 IN GND 3 6 OUT NC 4 5 IN n ABSOLUTE MAXIMUM RATINGS Supply Voltage (V IN) .......................................................... ... ... ... .......... ... ........... 7.0V Fault Flag Voltage (V FLG) ........................................................... ... ... ... ... ... ..... ... ...... 7.0V Fault Flag Current (IFLG) ...................... ... ... ........................ ... ... .................. ........ 50mA Control Input (V CTL) ......................................................... ... ... ... ... ....... ... ..... . -0.3V ~15V Operating Temperature Range ................. ... ... ... ..... ... ... ... ... .... ............... -20C~80C Storage Temperature Range ....................................... ... ... .................. -65C ~ 150C n TEST CIRCUIT 10K VCC +5V ON CTL OFF OUT FLG IN GND OUT IN NC 10 0.1F AIC1525 2 AIC1525 n ELECTRICAL CHARACTERISTICS (V IN= 5V, Ta=25C, unless otherwise specified.) PARAMETERS Supply Current Control Input Voltage CONDITIONS TYP. MAX. UNIT VCTL =Logic "0" , OUT=Open 0.75 5 A VCTL =Logic "1" , OUT=Open 75 100 VCTL =Logic "0" 1.7 0.8 VCTL =Logic "1" Control Input Current MIN. 2.4 VCTL =Logic "0" 0.01 1 VCTL =Logic "1" 0.01 1 Control Input Capacitance 1 Output MOSFET Resistance V 2.0 70 A pF 100 m S Output Turn-On Rise Delay RL = 10 each Output 100 Output Turn-On Rise Time RL = 10 each Output 1000 4000 S Output Turn-Off Delay RL = 10 each Output 0.8 20 S Output Turn-Off Fall Time RL = 10 each Output 0.7 20 S 10 A 1.25 A Output Leakage Current Current Limit Threshold 0.7 1.0 Overtemperature Shutdown TJ Increasing 135 Threshold TJ Decreasing 125 VIN = 5V , IL =10 mA 10 25 VIN = 3.3V , IL =10mA 15 40 VFLG = 5V 0.01 1 VIN Increasing 2.6 VIN Decreasing 2.4 Error Flag Output Resistance Error Flag Off Current UVLO Threshold C A V 3 AIC1525 n BLOCK DIAGRAM OUT DRIVER CTL CURRENT LIMIT CHARGE PUMP THERMAL SHUTDOWN GND n TYPICAL CS POWER N-MOSFET FLG UVLO IN PERFORMANCE CHARACTERISTICS Output ON Resistance vs. Supply Voltage 69 68 67 66 65 64 2 3 4 5 Supply Voltage (V) 6 7 On-Resistance vs. Temperature 90 ON Resistance (m ) Switch-ON Resistance (m) 70 80 70 60 50 -60 -40 -20 0 20 40 Temperature ( C) 60 80 100 120 4 AIC1525 ON-State Supply Current vs. Supply Voltage UVLO Threshold Voltage vs. Temperature 100 UVLO Threshold Voltage (V) Switch-ON Supply Current (A) 2.8 90 80 70 60 50 2.7 rising 2.6 2.5 2.4 falling 2.3 2.2 2 3 4 5 6 7 -40 -20 0 Supply Voltage (V) n TYPICAL 20 40 60 Temperature (C) 80 100 120 PERFORMANCE CHARACTERISTICS (Continued) OFF-State Supply Current vs. Temperature ON-State Supply Current vs. Temperature 95 1 10 Supply Current (A) Supply Current (A) 90 85 80 75 70 2 10 3 10 65 60 -40 -20 0 20 40 60 Temperature ( C) 80 100 4 10 120 -40 OFF State Current vs. Supply Voltage -20 0 20 40 60 Temperature (C) 80 100 120 CTL Threshold Voltage vs. Supply Voltage 0.10 2.8 2.6 2.4 Threshold voltage (V) Supply current (A) 0.08 0.06 0.04 0.02 2.2 CTL rising 2.0 1.8 CTL falling 1.6 1.4 1.2 1.0 0.8 0 3 4 5 6 Supply Voltage (V) 7 8 2 3 4 5 6 7 Supply Voltage (V) 5 AIC1525 Output fall Time vs. Temperature 1.40 0.54 1.35 0.52 Turn-Off Fall Time (S) Turn-ON Resistance (mS) Output Rise Time vs. Temperature 1.30 1.25 1.20 1.15 1.10 0.50 0.48 0.46 0.44 0.42 0.40 1.05 -40 -20 0 20 40 60 Temperature (C) 80 100 120 0.38 -40 -20 0 20 40 60 Temperature ( C) 80 100 120 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 Temperature (C) 80 100 120 140 Current Limit Response Short Circuit Response FLG 0.8A FLG Thermal Shutdown IOUT IOUT 1A/10mV 1A/10mV Turn-On/Off Characteristic ( I ) Turn On/Off Characteristic (II) CTL VOUT IOUT OUT 1A/10mV R=10 RL=35 CL=100 F 7 AIC1525 n PIN DESCRIPTION PIN 1: CTL PIN 2: FLG - 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 active. In normal mode operation, it also can indicate thermal shutdown or undervoltage. PIN 3: GND - Chip power ground. PIN 4: NC - Not internally connected. PIN 5, 7: IN - Power supply Input. 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. l Thermal Shutdown When the chip temperature exceeds 135C, the thermal shutdown function turns off MOSFET switch and signals the error flag. A hysteresis of 10C prevents the MOSFET from turning back on until the chip temperature drops to below 125C. l Supply Filtering A 0.1F to 1F bypass capacitor from IN to GND, located near the device, is strongly recommended to 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 33F, 16V tantalum or 100F, 10V electrolytic capacitor mounted close to downstream connector should provide transient drop protection. 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. 8 AIC1525 VCC 5.0V 33uF 10K 4.50 V to 5.25V Upstream VBUS 100mA max AIC1722 VBUS IN D+ + 1 F C IN D- VIN OUT + 10 F C OUT GND GND Ferrite Bead USB Controll er ON/OFF CTL OUT OVERCURRENT FLG GND NC IN GND DATA 33 F OUT IN AIC1525 0.01 F D- * GND 0.1 F 33 F, 16V Tantalum, or 100F, 10V Electrolytic Bold line indicate high- current traces * VBUS D+ + DATA One-Port Self-Powered Hub n PHYSICAL DIMENSIONS 8 LEAD PLASTIC SO (unit: mm) D H SYMBOL MIN MAX A 1.35 1.75 A1 0.10 0.25 B 0.33 0.51 C 0.19 0.25 D 4.80 5.00 E 3.80 4.00 E e A e C A1 l B L 1.27(TYP) H 5.80 6.20 L 0.40 1.27 9 AIC1525 l 8 LEAD PLASTIC DIP (unit: mm) D E1 E A2 A1 eB e MIN MAX A1 0.381 -- A2 2.92 4.96 b 0.35 0.56 C 0.20 0.36 D 9.01 10.16 E 7.62 8.26 E1 6.09 7.12 C L b SYMBOL e 2.54 (TYP) eB -- 10.92 L 2.92 3.81 10