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| AIC1520 Single High-Side Power Switch n FEATURES l l l l * 120mW (5V Input) High-Side MOSFET Switch. 500mA Continuous Load Current. 80mA Typical On-State Supply Current. Current-Limit / Short Circuit Protection. Thermal Limiting Protection under Overcurrent Condition. l n DESCRIPTION switch for The AIC1520 is an integrated high-side power self-powered and bus-powered Universal Serial Bus (USB) applications. The high-side switch is a MOSFET with 120mW RDS(ON), which meets USB voltage drop requirements for maximum transmission wire length. Output current is typically limited to 1.0A, well below the 5A safety requirement, and thermal shutdown function shuts the switch off to prevent damage under overcurrent conditions. Guaranteed minimum output rise time limits Undervoltage Lockout Ensures that Switch is off at Start Up. Output can be Forced Higher than Input (Off-State). Slow Turn ON and Fast Turn OFF. l l n APPLICATIONS l l l l l Motherboard USB Management. USB Power Management. Hot Plug-In Power Supplies. Battery-Charger Circuit. Power Distribution Switch. inrush current during hot plug-in, minimizing EMI and preventing the voltage at upstream port from dropping excessively. n TYPICAL APPLICATION CIRCUIT Ferrite Bead AIC1520 VCC 5.0V + 33mF IN OUT 0.1mF GND + VBUS *33mF D+ 0.01mF DGND *33mF, 16V Tantalum, or 100mF, 10V Electrolytic Bold line indicate high-current traces DATA USB High-Side Power Switch Analog Integrations Corporation DS-1520-00 July 7, 00 4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC TEL: 886-3-5772500 FAX: 886-3-5772510 www.analog.com.tw 1 AIC1520 n ORDERING INFORMATION AIC1520CX PACKAGING TYPE X: SOT-89 Z: TO-92 ORDER NUMBER AIC1520CX (SOT-89) PIN CONFIGURATION FRONT VIEW 1: IN 2: GND 3: OUT 1 2 3 AIC1520CZ (TO-92) TOP VIEW 1: IN 2: GND 3: OUT 1 2 3 n ABSOLUTE MAXIMUM RATINGS Supply Voltage (VIN) ........................................................................................... 7.0V ............................................................... -40C ~ 85C ............................................................... -65C ~ 150C Operating Temperature Range Storage Temperature Range n ELECTRICAL CHARACTERISTICS (VIN= 5V, Ta=25C, unless otherwise specified.) PARAMETERS Supply Current Output MOSFET Resistance Output Turn-On Rise Time Output Turn-Off Fall Time Output Leakage Current Current Limit Threshold Thermal Limit UVLO Threshold VIN Increasing VIN Decreasing 0.6 1.0 110 2.8 2.6 CONDITIONS Switch On, OUT=Open IOUT = 500mA RL = 10W RL = 10W MIN. TYP. 80 120 500 0.2 10 2 1.25 MAX. 100 180 UNIT mA mW mS mS mA A C V 2 AIC1520 n BLOCK DIAGRAM OSC. Thermal Protection UVLO IN Charge Pump Gate Control Current Limit RS GATE NMOS GND OUT n TYPICAL PERFORMANCE CHARACTERISTICS On-State Supply Current vs. Supply Voltage 90 85 85 On-State Supply Current vs. Temperature Supply Current (mA) 80 75 70 65 60 Supply Current (mA) 80 75 70 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 65 -40 -20 0 20 40 60 80 100 Supply Voltage (V) Temperature (C) 3 AIC1520 n TYPICAL PERFORMANCE CHARACTERISTICS (Continued) Output On Resistance vs. Supply Voltage 130 125 120 115 110 105 100 3.0 150 Output On Resistance vs. Temperature Switch On Resistance (mW) 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 Switch On Ristance (mW) 140 130 120 110 100 90 80 Supply Voltage (V) -40 -20 0 20 40 60 80 100 Temperature (C) UVLO Threshold Voltage vs. Temperature 3.0 2.9 1.20 1.15 Current Limit Threshold vs. Temperature UVLO Threshold Voltage (V) Rising 2.8 2.7 Current Limit (A) 1.10 1.05 1.00 0.95 0.90 Falling 2.6 2.5 2.4 -40 -20 0 20 40 60 80 100 0.85 0.80 -40 -20 0 20 40 60 80 100 Temperature (C) Temperature (C) Turn On Rising Time (10W loading) Output Rise Time vs. temperature 550 200mA/DIV Output Rise Time (m S) 500 IOUT 450 VOUT 400 VIN 350 -40 -20 0 20 40 60 80 100 Temperature (C) 4 AIC1520 n TYPICAL PERFORMANCE CHARACTERISTICS (Continued) Turn On Characteristic (35W, 100mF Loading) Turn On Characteristic (35W Loading) 500mA/div IOUT 220mF 100mF VOUT no cap IOUT, 200mA/div VIN Current Limit Threshold Short Circuit Testing VOUT VOUT 1.2A 1A IOUT IOUT 500mA/DIV 500mA/DIV Thermal Oscillation Thermal Limiting Transient Response Short Circuit Response Time VOUT Short IOUT 500mA/DIV Thermal limit (2W Loading) IOUT 1A/DIV VOUT 5 AIC1520 n PIN DESCRIPTION PIN 1: IN PIN 2: GND - Power supply input. - Chip power ground. PIN 3: OUT - MOSFET switch output. n APPLICATION INFORMATIONS 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. AIC1520 allows a minimum current of 0.5A through the MOSFET switches. 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 33uF, 16V tantalum or 100uF, 10V electrolytic capacitor mounted close to l Thermal Protection When the chip temperature exceeds 110C, the thermal protection function works. l Supply Filtering A 0.1mF to 1mF bypass capacitor from IN to GND, located near the device, is strongly recommended to 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 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. 6 AIC1520 n PHYSICAL DIMENSIONS l SOT-89 (unit: mm) D D1 C A SYMBOL A B C D MIN 1.40 0.36 0.35 4.40 1.62 2.29 MAX 1.60 0.48 0.44 4.60 1.83 2.60 1.50 (TYP.) 3.00 (TYP.) H E D1 E e L e e1 B e1 H L 3.94 0.89 4.25 1.20 l SOT-89 MARKING Part No. AIC1520-CX Marking BG01 l TO-92 (unit: mm) A L C E SYMBOL A C MIN 4.32 MAX 5.33 0.38 (TYP.) e1 D D E e1 L 4.40 3.17 1.27 (TYP.) 12.7 5.20 4.20 - 7 |
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