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 Guaranteed minimum output rise time limits inrush current during hot plug-in, minimizing EMI and preventing the voltage at upstream port from dropping excessively. Motherboard USB Management. USB Power Management. Hot Plug-In Power Supplies. Battery-Charger Circuit. Power Distribution Switch. n TYPICAL APPLICATION CIRCUIT Ferrite Bead AI C1521-0 VCC 5.0V IN OUT + 33 F VBUS + 0.1F D+ *33 F CTL 0. 01 F D- GND GND *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-1521-00 012102 1 AIC1521 n ORDERING INFORMATION AIC1521-XCXXX PIN CONFIGURATION PACKING TYPE TR: TAPE & REEL TB: TUBE BG: BAG (for SOT-89-5) PACKAGING TYPE O: MSOP S: SO8 W: SOT-89-5 MSOP8 TOP VIEW NC 1 8 NC CTL 2 7 OUT IN 3 6 NC NC 4 5 GND SO8 TOP VIEW CONTROL POLARITY 0: Active Low 1: Active High NC 1 8 NC CTL 2 7 IN 3 OUT 6 NC NC 4 5 GND Example: AIC1521-0COTR a Active Low Version, in MSOP Package & Taping & Reel Packing Type n ABSOLUTE MAXIMUM RATINGS Supply Voltage (V IN).................................................... ... ......... ... ... ... .......... ... ........... 7.0V Operating Temperature Range ......... ... ... ... .............. ... ... ... ... ... .... ............... -40C ~ 85C Storage Temperature Range ................... ... ... ..................... ... ... .................. -65C ~ 150C n ELECTRICAL CHARACTERISTICS (V IN= 5V, T A=25C, unless otherwise specified.) PARAMETERS Supply Current Control Input Voltage CONDITIONS MIN. TYP. MAX. Switch Off, OUT=Open 0.75 2 Switch On, OUT=Open 80 100 VCTL =Logic "0" VCTL =Logic "1" 0.8 2.4 UNIT A V VCTL =Logic "0" 0.01 1 Control Input Current VCTL =Logic "1" 0.01 1 Output MOSFET Resistance IOUT = 500mA 120 180 Output Turn-On Rise Delay RL = 10 30 S Output Turn-On Rise Time RL = 10 500 S Output Turn-Off Delay RL = 10 0.2 10 A m S n ELECTRICAL CHARACTERISTICS (Continued) 2 AIC1521 PARAMETERS CONDITIONS Output Turn-Off Fall Time MIN. TYP. MAX. UNIT 0.2 10 S 2 A 1.25 A RL = 10 Output Leakage Current Current Limit Threshold 0.6 1.0 Thermal Limit C 110 UVLO Threshold VIN Increasing 2.8 VIN Decreasing 2.6 V n TYPICAL PERFORMANCE CHARACTERISTICS 90 85 Supply Current (A) Supply Current (A) 85 80 75 70 80 75 70 65 60 65 3.0 4.0 4.5 5.0 5.5 6.0 6.5 7.0 - 40 7.5 Supply Voltage (V) On-State Supply Current vs. Supply Voltage Fig. 2 12.0 20 11.5 18 10.5 10.0 9.5 9.0 0 20 40 60 80 100 Temperature (C) On-State Supply Current vs. Temperature 14 12 10 8 6 4 8.5 2 8.0 3.0 -20 16 11.0 Supply Current (nA) Supply Current (nA) Fig. 1 3.5 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 Supply Voltage (V) Fig. 3 Off-State Supply Current vs. Supply Voltage 0 -40 -20 0 20 40 60 80 100 Temperature (C) Fig. 4 Off-State Supply Current vs. Temperature 3 AIC1521 n TYPICAL PERFORMANCE CHARACTERISTICS (Continued) 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 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 -40 Supply Voltage (V) Fig. 5 Output On Resistance vs. Supply Voltage -20 0 20 40 60 Temperature (C) 80 100 Fig. 6 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. 7 UVLO Threshold Voltage vs. Temperature -40 -20 0 20 40 60 Temperature (C) 80 100 Fig. 8 Current Limit Threshold vs. Temperature 300 Output Rise Time ( S) Output Fall Time (nS) 550 500 450 400 250 200 150 100 50 350 -40 -20 0 20 40 60 80 100 Temperature (C) Fig. 9 Output Rise Time vs. temperature -40 -20 0 20 40 60 80 100 Temperature (C) Fig. 10 Output Fall Time vs. Temperature 4 AIC1521 n TYPICAL PERFORMANCE CHARACTERISTICS (Continued) 2.2 2.0 CTL Rising 220F 1.8 1.6 100F 1.4 IOUT , 200mA/DIV CTL Falling 1.2 No Cap 1.0 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 CTL 7.5 Supply Voltage (V) Fig. 11 CTL Threshold Voltage vs. Supply Voltage Fig. 12 Turn On Characteristic (35, Loading) I OUT 200mA/DIV IOUT 200mA/DIV V OUT VOUT 426S 107nS CTL CTL Fig. 14 Turn Off Falling Time (10 Loading) Fig. 13 Turn On Rising Time (10 loading) IOUT 500mA/DIV IOUT 500mA/DIV VOUT VOUT CTL CTL Fig. 15 Turn On Characteristic (35, 100F Loading) Fig. 16 Turn Off Falling Time (35, 100F Loading) 5 AIC1521 n TYPICAL PERFORMANCE CHARACTERISTICS (Continued) VOUT VOUT 1.2A 1A I OUT I OUT Thermal limit (2) loading) 500mA/DIV 500mA/DIV Fig. 17 Current Limit Threshold Fig. 18 Thermal Limiting Transient Response Short VOUT I OUT 1A/DIV Thermal Oscillation I OUT 500mA/DIV Fig. 19 Short Circuit Testing V OUT Fig. 20 Short Circuit Response Time 6 AIC1521 n BLOCK DIAGRAM OSC. CTL Thermal Protection UVLO Charge Pump IN Current Limit GATE NMOS Gate Control GND RS OUT n PIN DESCRIPTIONS PIN 1/4/6/8: NC: PIN 3: IN PIN 2: CTL PIN 5: GND - Chip power ground. - TTL compatible control input. It controls the power switch turnon/turn-off. Active High for AIC1521-1 and active low for AIC1521-0. n APPLICATION INFORMATIONS 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 AIC1521 allows minimum 500mA continuous load current per Channel. Thermal Protection When the chip temperature exceeds 110C, the thermal protection function works. Supply Filtering A 0.1F to 1F 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. - Power supply input. PN 7: OUT - MOSFET switch output. 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. 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. 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. Transient Droop Requirements 7 AIC1521 n PHYSICAL DIMENSIONS l MSOP 8 (unit: mm) D H E e SYMBOL MIN MAX A 0.76 0.97 A1 -- 0.20 B 0.28 0.38 C 0.13 0.23 D 2.90 3.10 E 2.90 3.10 e A A1 C B H 4.80 5.00 L 0.40 0.66 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 L 8 LEAD PLASTIC SO (unit: mm) D H E e e A C A1 l 0.65 B 1.27(TYP) H 5.80 6.20 L 0.40 1.27 L 8