AIC1520 Single High-Side Power Switch n FEATURES n DESCRIPTION · 120mW (5V Input) High-Side MOSFET Switch. The AIC1520 is an integrated high-side power l 500mA Continuous Load Current. switch l 80mA Typical On-State Supply Current. Universal Serial Bus (USB) applications. The l Current-Limit / Short Circuit Protection. high-side switch is a MOSFET with 120mW RDS(ON), l Thermal Limiting Protection under Overcurrent which meets USB voltage drop requirements for Condition. maximum transmission wire length. l l for self-powered and bus-powered Undervoltage Lockout Ensures that Switch is off at Start Up. Output current is typically limited to 1.0A, well Output can be Forced Higher than Input (Off-State). below the 5A safety requirement, and thermal shutdown function shuts the switch off to prevent l damage under overcurrent conditions. Slow Turn ON and Fast Turn OFF. n APPLICATIONS Guaranteed l Motherboard USB Management. l USB Power Management. l Hot Plug-In Power Supplies. l Battery-Charger Circuit. l Power Distribution Switch. 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 Ferrite Bead AIC1520 VCC 5.0V 33mF OUT IN + VBUS + 0.1mF GND *33mF D+ 0.01mF DGND * 33mF, 16V Tantalum, or DATA 100mF, 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, ROC DS-1520-00 TEL: 886-3-5772500 July 7, 00 FAX: 886-3-5772510 www.analog.com.tw 1 AIC1520 n ORDERING INFORMATION AIC1520CX ORDER NUMBER FRONT VIEW 1: IN 2: GND 3: OUT AIC1520CX (SOT-89) PACKAGING TYPE X: SOT-89 Z: TO-92 PIN CONFIGURATION 1 TOP VIEW 1: IN 2: GND 3: OUT AIC1520CZ (TO-92) 2 3 1 2 3 n ABSOLUTE MAXIMUM RATINGS Supply Voltage (VIN) .......................................................………….......……........... 7.0V Operating Temperature Range ......………..............…………….…............... -40°C ~ 85°C Storage Temperature Range ....................................……….................. -65°C ~ 150°C n ELECTRICAL CHARACTERISTICS (VIN= 5V, Ta=25°C, unless otherwise specified.) PARAMETERS CONDITIONS MIN. TYP. MAX. UNIT Supply Current Switch On, OUT=Open 80 100 mA Output MOSFET Resistance IOUT = 500mA 120 180 mW Output Turn-On Rise Time RL = 10W 500 Output Turn-Off Fall Time RL = 10W 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 mS 10 mS 2 mA 1.25 A °C V 2 AIC1520 n BLOCK DIAGRAM Thermal Protection OSC. UVLO IN Charge Pump Current Limit RS GATE Gate Control GND NMOS OUT n TYPICAL PERFORMANCE CHARACTERISTICS On-State Supply Current vs. Supply Voltage On-State Supply Current vs. Temperature 85 90 Supply Current (mA) Supply Current (mA) 85 80 75 70 80 75 70 65 60 3.0 3.5 4.0 4.5 5.0 5.5 6.0 Supply Voltage (V) 6.5 7.0 7.5 65 -40 -20 0 20 40 60 80 100 Temperature (°C) 3 AIC1520 n TYPICAL PERFORMANCE CHARACTERISTICS (Continued) Output On Resistance vs. Supply Voltage Output On Resistance vs. Temperature 130 Switch On Resistance (mW) 150 Switch On Ristance (mW) 125 120 115 110 105 140 130 120 110 100 90 80 100 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 -40 Supply Voltage (V) 0 20 40 60 80 100 Temperature (°C) UVLO Threshold Voltage vs. Temperature Current Limit Threshold vs. Temperature 3.0 1.20 2.9 UVLO Threshold Voltage (V) -20 1.15 Current Limit (A) Rising 2.8 2.7 Falling 2.6 1.10 1.05 1.00 0.95 0.90 2.5 0.85 0.80 2.4 -40 -20 0 20 40 60 80 100 -40 -20 0 20 40 60 80 100 Temperature (°C) Temperature (°C) Output Rise Time vs. temperature Turn On Rising Time (10W loading) 550 Output Rise Time (m S) 200mA/DIV 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 Loading) Turn On Characteristic (35W, 100mF Loading) 500mA/div IOUT 220mF 100mF IOUT, 200mA/div VOUT no cap VIN Short Circuit Testing Current Limit Threshold VOUT VOUT 1.2A 1A IOUT IOUT 500mA/DIV 500mA/DIV Thermal Oscillation Short Circuit Response Time Thermal Limiting Transient Response Short VOUT IOUT 500mA/DIV Thermal limit (2W Loading) IOUT 1A/DIV VOUT 5 AIC1520 n PIN DESCRIPTION PIN 1: IN - Power supply input. PIN 2: GND - Chip power ground. n APPLICATION INFORMATIONS l Current Limit PIN 3: OUT - MOSFET switch output. USB support dynamic attachment (hot plug-in) of The current limit threshold is preset internally. It peripherals. A current surge is caused by the input protects the output MOSFET switches from capacitance of downstream device. Ferrite beads damage due to undesirable short circuit conditions are recommended in series with all power and or excess inrush current often encountered during ground connector pins. Ferrite beads reduce EMI hot plug-in. AIC1520 allows a minimum current of and limit the inrush current during hot-attachment 0.5A through the MOSFET switches. by filtering high-frequency signals. l Thermal Protection l Short Circuit Transient When the chip temperature exceeds 110°C, the Bulk capacitance provides the short-term transient thermal protection function works. current needed during a hot-attachment event. With a 33uF, 16V tantalum or 100uF, 10V l Supply Filtering electrolytic capacitor mounted close to A 0.1mF to 1mF bypass capacitor from IN to GND, downstream connector should provide transient located near the device, is strongly recommended drop protection. to control supply transients. Without a bypass capacitor, an output short may cause sufficient l Printed Circuit Layout ringing on the input (from supply lead inductance) The power circuitry of USB printed circuit boards to damage internal control circuitry. requires a customized layout to maximize thermal dissipation and to minimize voltage drop and EMI. l Transient Droop Requirements 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