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| AIC1521 Single High-Side Power Switch With Control Function n FEATURES * 120m (5V Input) High-Side MOSFET Switch. l 500mA Continuous Load Current. l 80A Typical On-State Supply Current. l 1A Typical Off-State Supply Current. l Current-Limit / Short Circuit Protection. l Thermal Limiting Protection under Overcurrent Condition. l Undervoltage Lockout Ensures that Switch is off at Start Up. l Output can be Forced Higher than Input (Off-State). l Slow Turn ON and Fast Turn OFF. l Active-High or Active-Low Enable. n DESCRIPTION The AIC1521 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 120m RDS(ON), which meets USB voltage drop requirements for maximum transmission wire length. The switch ON/OFF is controlled by CTL pin. 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. n APPLICATIONS l l l l l Motherboard USB Management. USB Power Management. Hot Plug-In Power Supplies. Battery-Charger Circuit. 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 Ferrite Bead AI C1521-0 VCC 5.0V IN OUT + VBUS 33 F 0.1F CTL GND + *33F 0 .01 F D+ DGND *33F, 16V Tantalum, or DATA 100F, 10V Electrolytic Bold line indicate high-current traces USB High-Side Power Switch Analog Integrations Corporation www.analog.com.tw DS-1520-00 Aug 18, 00 TEL: 886-3-5772500 4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC FAX: 886-3-5772510 1 AIC1521 n ORDERING INFORMATION AIC1521-XCX PACKAGING TYPE O: MSOP S: SO8 W: SOT-89-5 ORDER NUMBER AIC1521-0CO AIC1521-1CO (MSOP8) PIN CONFIGURATION FRONT VIEW NC 1 CTL 2 IN 3 8 NC 7 OUT 6 NC 5 GND CONTROL POLARITY 0: Active Low 1: Active High NC 4 AIC1521-0CS AIC1521-1CS (SO8) FRONT VIEW NC 1 CTL 2 IN 3 NC 4 8 NC 7 OUT 6 NC 5 GND AIC1521-0CW AIC1521-1CW (SOT-89-5) FRONT VIEW 1: IN 2: GND 3: OUT 4: NC 5: CTL 5 4 1 2 3 n ABSOLUTE MAXIMUM RATINGS Supply Voltage (V IN) .......................................................... ... ... ... .......... ... ........... 7.0V ......... ... ... ................. ... ... ... ... .... ............... -40C ~ 85C ....................................... ... ... .................. -65C ~ 150C Operating Temperature Range Storage Temperature Range n ELECTRICAL CHARACTERISTICS (V specified.) PARAMETERS Supply Current Control Input Voltage Control Input Current Output MOSFET Resistance Output Turn-On Rise Delay Output Turn-On Rise Time Output Turn-Off Delay CONDITIONS Switch Off, OUT=Open Switch On, OUT=Open VCTL =Logic "0" VCTL =Logic "1" VCTL =Logic "0" VCTL =Logic "1" IOUT = 500mA RL = 10 RL = 10 RL = 10 IN= 5V, Ta=25C, unless otherwise MIN. TYP. 0.75 80 MAX. 2 100 0.8 UNIT A V A m S S 2.4 0.01 0.01 120 30 500 0.2 10 1 1 180 S 2 AIC1521 n ELECTRICAL CHARACTERISTICS (Continued) PARAMETERS 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 RL = 10 MIN. TYP. 0.2 MAX. 10 2 1.25 UNIT S A A C V n BLOCK DIAGRAM CTL OSC. Thermal Protection UVLO IN Charge Pump Gate Control Current Limit RS GND GATE NMOS OUT n TYPICAL PERFORMANCE CHARACTERISTICS On-State Supply Current vs. Supply Voltage 90 85 On-State Supply Current vs. Temperature 85 Supply Current (A) 80 75 Supply Current (A) 3.5 4.0 80 75 70 70 65 60 3.0 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 AIC1521 n TYPICAL PERFORMANCE CHARACTERISTICS Off-State Supply Current vs. Supply Voltage 12.0 11.5 20 18 16 (Continued) Off-State Supply Current vs. Temperature Supply Current (nA) Supply Current (nA) 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 11.0 10.5 10.0 9.5 9.0 8.5 8.0 3.0 14 12 10 8 6 4 2 0 -40 -20 0 20 40 60 80 100 Supply Voltage (V) Temperature (C) Output On Resistance vs. Supply Voltage 130 150 Output On Resistance vs. Temperature Switch On Ristance (m) 125 Switch On Resistance (m) 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 140 130 120 110 100 90 80 120 115 110 105 100 3.0 -40 -20 0 20 40 60 80 100 Supply Voltage (V) Temperature (C) UVLO Threshold Voltage vs. Temperature 3.0 1.20 Current Limit Threshold vs. Temperature UVLO Threshold Voltage (V) 2.9 1.15 Rising 2.8 Current Limit (A) 1.10 1.05 1.00 0.95 0.90 2.7 Falling 2.6 2.5 0.85 0.80 -40 -20 0 20 40 60 80 100 -40 -20 0 20 40 60 80 100 2.4 Temperature (C) Temperature (C) 4 AIC1521 n TYPICAL PERFORMANCE CHARACTERISTICS Output Rise Time vs. temperature 550 300 (Continued) Output Fall Time vs. Temperature Output Rise Time ( S) 500 Output Fall Time (nS) 250 200 450 150 400 100 350 -40 -20 0 20 40 60 80 100 50 -40 -20 0 20 40 60 80 100 Temperature (C) Temperature (C) CTL Threshold Voltage vs. Supply Voltage 2.2 2.0 1.8 1.6 1.4 Turn On Characteristic (35 , Loading) CTL Rising 220F 100F CTL Falling 1.2 1.0 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 No Cap IOUT , 200mA/DIV CTL Supply Voltage (V) Turn On Rising Time (10 loading) Turn Off Falling Time (10 Loading) I OUT 200mA/DIV IOUT V OUT 200mA/DIV VOUT 426S CTL 107nS CTL 5 AIC1521 n TYPICAL PERFORMANCE CHARACTERISTICS Turn On Characteristic (35, 100F Loading) (Continued) Turn Off Falling Time (35, 100uF Loading) IOUT 500mA/DIV IOUT 500mA/DIV VOUT VOUT CTL CTL Current Limit Threshold Thermal Limiting Transient Response VOUT VOUT 1.2A 1A I OUT I OUT 500mA/DIV 500mA/DIV Thermal limit (2) loading) Short Circuit Testing Short Circuit Response Time Short VOUT Thermal Oscillation I OUT 1A/DIV I OUT 500mA/DIV V OUT 6 AIC1521 n PIN DESCRIPTION MSOP8, SO8 PIN 1/4/6/8: NC: PIN 2: CTL - TTL compatible control input. It controls the power switch turnon/turn-off. Active High for AIC1521-1 and active low for AIC1521-0. Power supply input. Chip power ground. SOT89-5 PIN 1: IN PIN 2: GND PIN 3: OUT PIN 4: NC PIN 5: CTL - TTL compatible control input. It controls the power switch turnon/turn-off. Active High for AIC1521-1 and active low for AIC1521-0. - Power supply input. - Chip power ground. - MOSFET switch output. PIN 3: INPIN 4: GND- PN 7: OUT- MOSFET switch output. n APPLICATION INFORMATIONS l Current Limit l l Transient Droop Requirements 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. 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 AIC1521 allows minimum 500mA continuous load current per Channel. l l Thermal Protection When the chip temperature exceeds 1 10C, the thermal protection function works. 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 downstream connector should provide transient drop protection. Supply Filtering A 0.1uF to 1uF 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 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. 7 AIC1521 1/2 PHYSICAL DIMENSIONS l MSOP 8 (unit: mm) D SYMBOL A A1 H E MIN 0.76 -0.28 0.13 2.90 2.90 0.65 4.80 0.40 MAX 0.97 0.20 0.38 0.23 3.10 3.10 5.00 0.66 B C D E e e A C A1 H L L B l 8 LEAD PLASTIC SO (unit: mm) D SYMBOL A A1 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) 6.20 1.27 B C D E e e A C A1 H L L 5.80 0.40 B 8 AIC1521 l SOT-89-5 (unit: mm) SYMBOL D b1 b A C MIN 1.40 0.32 1.40 0.30 4.40 2.40 300 (TYP) 1.50 (TYP) 4.20 0.80 MAX 1.60 0.52 1.80 0.50 4.60 2.60 A b b1 C HE E D E e LE b e1 e e1 HE LE 5.00 --- l SOT-89-5 MARKING Part No. AIC1521-0CW AIC1521-1CW Marking BH01 BH02 9 |
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