AIC1520 USB High-Side Power Switch n FEATURES n DESCRIPTION * 120m (5V Input) High-Side MOSFET Switch. The AIC1520 is an integrated high-side power l 500mA Continuous Load Current. switch for self-powered and bus-powered Universal l 80A Typical On-State Supply Current. Serial Bus (USB) applications. The high-side switch l Current-Limit / Short Circuit Protection. is a MOSFET with 120m RDS(ON), which meets l Thermal Limiting Protection under Overcurrent USB voltage drop requirements for maximum Condition. transmission wire length. l Undervoltage Lockout Ensures that Switch is off at Start Up. Output current is typically limited to 1.0A, well l Output can be Forced Higher than Input (Off-State). below the 5A safety requirement, and thermal l Slow Turn ON and Fast Turn OFF. shutdown function shuts the switch off to prevent damage under overcurrent conditions. n APPLICATIONS l Motherboard USB Management. l USB Power Management. l Hot Plug-In Power Supplies. l Battery-Charger Circuit. l Power Distribution Switch. Guaranteed minimum output rise time limits inrush current during hot plug-in, minimizing EMI and preventing the voltage at upstream port from dropping excessively. n TYPICAL APPLICATION CIRCUIT AIC1520 Ferrite Bead VCC 5.0V OUT IN + 33 F VBUS D+ + 0.1F GND *33 F 0 .01 F DGND *33F, 16V Tantalum, or DATA 100F, 10V Electrolytic Bold line indicate high-current traces USB High-Side Power Switch Analog Integrations Corporation 4F, 9 Industry E. 9th Rd, Science-Based Industrial Park, Hsinchu, Taiwan TEL: 886-3-5772500 FAX: 886-3-5772510 www.analog.com.tw DS-1520-01 032502 1 AIC1520 n ORDERING INFORMATION AIC1520CXXX PIN CONFIGURATION SOT-89 PACKING TYPE TR: TAPE & REEL BG: BAG TOP VIEW 1: IN 2: GND 3: OUT PACKAGING TYPE X: SOT-89 Z: TO-92 1 2 3 TO-92 Example: AIC1520CXTR a in SOT-89 Package & Taping & Reel Packing Type TOP VIEW 1: I N 2: GND 3: OUT 1 2 3 n ABSOLUTE MAXIMUM RATINGS Supply Voltage (V IN) .......................................................... ... ... ... .......... ... ........... 7.0V Operating Temperature Range Storage Temperature Range ......... ... ... ................. ... ... ... ... .... ............... -40C ~ 85C ....................................... ... ... .................. -65C ~ 150C n ELECTRICAL CHARACTERISTICS (V IN= 5V, T A=25C, unless otherwise specified.) PARAMETERS CONDITIONS MIN. TYP. MAX. UNIT 80 100 A 180 m Supply Current Switch On, OUT=Open Output MOSFET Resistance IOUT = 500mA 120 Output Turn-On Rise Time RL = 10 500 Output Turn-Off Fall Time RL = 10 0.2 Output Leakage Current Current Limit Threshold 0.6 Thermal Limit UVLO Threshold 1.0 110 VIN Increasing 2.8 VIN Decreasing 2.6 S 10 S 2 A 1.25 A C V 2 AIC1520 n TYPICAL PERFORMANCE CHARACTERISTICS 90 85 Supply Current (A) Supply Current (A) 85 80 75 70 80 75 70 65 60 3.0 3.5 4.0 Fig. 1 4.5 5.0 5.5 6.0 6.5 7.0 65 7.5 Supply Voltage (V) On-State Supply Current vs. Supply - 40 Fig. 2 -20 0 20 40 60 80 100 -20 0 20 40 60 80 100 Temperature (C) On-State Supply Current vs. Temperature 130 125 Switch On Resistance (m) Switch On Ristance (m ) 150 120 115 110 105 140 130 120 110 100 90 80 100 3.0 3.5 Fig. 3 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 -40 Supply Voltage (V) Output On Resistance vs. Supply Voltage Temperature (C) Fig. 4 Output On Resistance vs. Temperature 3.0 2.9 1.15 Rising Current Limit (A) UVLO Threshold Voltage (V) 1.20 2.8 2.7 Falling 2.6 1.10 1.05 1.00 0.95 0.90 2.5 0.85 2.4 0.80 -40 -20 0 20 40 60 80 100 Temperature (C) Fig. 5 UVLO Threshold Voltage vs. Temperature -40 -20 Fig. 6 0 20 40 60 Temperature (C) 80 100 Current Limit Threshold vs. Temperature 3 AIC1520 n TYPICAL PERFORMANCE CHARACTERISTICS (Continued) 550 200mA/DIV Output Rise Time ( S) IOUT 500 450 VOUT 400 VIN 350 -40 -20 0 20 40 60 80 100 Temperature (C) Fig. 7 Output Rise Time vs. temperature 500mA/div Fig. 8 Turn On Rising Time (10 loading) IOUT 220F 100F IOUT, 200mA/div VOUT no cap VIN Fig. 9 Turn On Characteristic (35 , 100F Loading) Fig. 10 Turn On Characteristic (35 Loading) VOUT VOUT 1.2A 1A IOUT IOUT 500mA/DIV 500mA/DIV Thermal Oscillation Fig. 11 Current Limit Threshold Fig. 12 Short Circuit Testing 4 AIC1520 n TYPICAL PERFORMANCE CHARACTERISTICS (Continued) Short VOUT IOUT 500mA/DIV I OUT Thermal limit (2 Loading) 1A/DIV VOUT Fig. 14 Fig. 13 Thermal Limiting Transient Response Short Circuit Response Time n BLOCK DIAGRAM OSC. Thermal Protection UVLO Charge Pump Current Limit Gate Control GND IN RS GATE NMOS OUT n PIN DESCRIPTIONS PIN 1: IN - Power supply input. PIN 2: GND - Chip power ground. PIN 3: OUT - MOSFET switch output. 5 AIC1520 n APPLICATION INFORMATIONS Current Limit Transient Drop Requirements The current limit threshold is preset internally. It The USB supports dynamic attachment (hot plug- protects the output MOSFET switches from in) of peripherals. A current surge is caused by the damage due to undesirable short circuit conditions input capacitance of downstream device. Ferrite or excess inrush current often encountered during beads are recommended in series with all power hot plug-in. AIC1520 allows a minimum current of and ground connector pins. Ferrite beads reduce 0.5A through the MOSFET switches. EMI and limit the inrush current during hotattachment by filtering high-frequency signals. Thermal Protection When the chip temperature exceeds 110C, the Short Circuit Transient thermal protection function works. Bulk capacitance provides the short-term transient current needed during a hot-attachment event. Supply Filtering With a 33uF, 16V tantalum or 100uF, 10V A 0.1F to 1F bypass capacitor from IN to GND, electrolytic located near the device, is strongly recommended downstream connector should provide transient to control supply transients. Without a bypass drop protection. capacitor mounted close to capacitor, an output short may cause sufficient ringing on the input (from supply lead inductance) Printed Circuit Layout to damage internal control circuitry. The power circuitry of USB printed circuit boards requires a customized layout to maximize thermal dissipation and to minimize voltage drop and EMI. 6 AIC1520 n PHYSICAL DIMENSIONS l SOT-89 (unit: mm) D A SYMBOL MIN MAX C A 1.40 1.60 B 0.36 0.48 C 0.35 0.44 D 4.40 4.60 D1 1.62 1.83 E 2.29 2.60 D1 H E L B e e1 l l e 1.50 (TYP.) e1 3.00 (TYP.) H 3.94 4.25 L 0.89 1.20 SYMBOL MIN MAX A 4.32 5.33 SOT-89 MARKING Part No. Marking AIC1520-CX BG01 TO-92 (unit: mm) A E L C C e1 D 0.38 (TYP.) D 4.40 5.20 E 3.17 4.20 e1 L 1.27 (TYP.) 12.7 - 7