AIC1521 Single High-Side Power Switch With Control Function n FEATURES • 120mΩ (5V Input) High-Side MOSFET Switch. l 500mA Continuous Load Current. l 80µA Typical On-State Supply Current. l 1µA 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 120mΩ 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 + 33µ F OUT VBUS + 0.1µF CTL GND *33µF D+ 0 .01µ F DGND *33µF, 16V Tantalum, or DATA 100µF, 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 4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC TEL: 886-3-5772500 FAX: 886-3-5772510 1 AIC1521 n ORDERING INFORMATION AIC1521-XCX ORDER NUMBER FRONT VIEW AIC1521-0CO AIC1521-1CO (MSOP8) PACKAGING TYPE O: MSOP S: SO8 W: SOT-89-5 PIN CONFIGURATION NC 1 8 NC CTL 2 7 OUT IN 3 CONTROL POLARITY 0: Active Low 1: Active High 6 NC 5 GND NC 4 FRONT VIEW AIC1521-0CS AIC1521-1CS (SO8) NC 1 8 NC CTL 2 7 OUT IN 3 6 NC NC 4 AIC1521-0CW AIC1521-1CW (SOT-89-5) 5 GND 5 FRONT VIEW 1: IN 2: GND 3: OUT 4: NC 5: CTL 1 4 2 3 n ABSOLUTE MAXIMUM RATINGS Supply Voltage (V IN) .......................................................… … … … .......… … ........... 7.0V Operating Temperature Range Storage Temperature Range ......… … … ..............… … … … … .… ............... -40°C ~ 85°C ....................................… … … .................. -65°C ~ 150°C n ELECTRICAL CHARACTERISTICS (V IN= 5V, Ta=25°C, 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 µA 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 = 10Ω 30 µS Output Turn-On Rise Time RL = 10Ω 500 µS Output Turn-Off Delay RL = 10Ω 0.2 10 µA mΩ µS 2 AIC1521 n ELECTRICAL CHARACTERISTICS (Continued) PARAMETERS CONDITIONS Output Turn-Off Fall Time MIN. TYP. MAX. UNIT 0.2 10 µS 2 µA 1.25 A RL = 10Ω 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 BLOCK DIAGRAM Thermal Protection OSC. CTL UVLO IN Charge Pump Current Limit RS GATE NMOS Gate Control GND OUT n TYPICAL PERFORMANCE CHARACTERISTICS On-State Supply Current vs. Supply Voltage On-State Supply Current vs. Temperature 85 90 Supply Current (µA) Supply Current (µA) 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 AIC1521 n TYPICAL PERFORMANCE CHARACTERISTICS 20 11.5 18 16 11.0 10.5 10.0 9.5 9.0 14 12 10 8 6 4 8.5 2 8.0 3.0 (Continued) Off-State Supply Current vs. Temperature 12.0 Supply Current (nA) Supply Current (nA) Off-State Supply Current vs. Supply Voltage 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 0 7.5 -40 -20 0 20 40 60 80 100 Temperature (°C) Supply Voltage (V) Output On Resistance vs. Supply Voltage Output On Resistance vs. Temperature 130 Switch On Resistance (mΩ) Switch On Ristance (mΩ) 150 125 120 115 110 105 140 130 120 110 100 90 80 100 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 -40 -20 0 20 40 60 80 Supply Voltage (V) Temperature (°C) UVLO Threshold Voltage vs. Temperature Current Limit Threshold vs. Temperature 100 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 0.80 2.4 -40 -20 0 20 40 Temperature (°C) 60 80 100 -40 -20 0 20 40 60 80 100 Temperature (°C) 4 AIC1521 n TYPICAL PERFORMANCE CHARACTERISTICS Output Rise Time vs. temperature (Continued) Output Fall Time vs. Temperature 300 Output Rise Time (µ S) Output Fall Time (nS) 550 500 450 400 250 200 150 100 50 350 -40 -20 0 20 40 60 80 -40 100 -20 0 20 40 60 80 100 Temperature (°C) Temperature (°C) Turn On Characteristic (35Ω , Loading) CTL Threshold Voltage vs. Supply Voltage 2.2 2.0 CTL Rising 220µF 1.8 1.6 100µF 1.4 CTL Falling IOUT , 200mA/DIV 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) Turn On Rising Time (10Ω loading) Turn Off Falling Time (10Ω Loading) I OUT 200mA/DIV 200mA/DIV IOUT V OUT VOUT CTL 426µS 107nS CTL 5 AIC1521 n TYPICAL PERFORMANCE CHARACTERISTICS Turn On Characteristic (35Ω, 100µF Loading) (Continued) Turn Off Falling Time (35Ω, 100uF Loading) IOUT 500mA/DIV 500mA/DIV IOUT VOUT VOUT CTL CTL Current Limit Threshold Thermal Limiting Transient Response VOUT VOUT 1.2A 1A I OUT I OUT Thermal limit (2Ω) loading) 500mA/DIV 500mA/DIV Short Circuit Testing Short Circuit Response Time Short VOUT Thermal Oscillation I OUT I OUT 1A/DIV 500mA/DIV V OUT 6 AIC1521 n PIN DESCRIPTION MSOP8, SO8 SOT89-5 PIN 1/4/6/8: NC: PIN 1: IN - Power supply input. PIN 2: GND - Chip power ground. PIN 3: OUT - MOSFET switch output. 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. PIN 3: IN- Power supply input. PIN 4: GND- Chip power ground. PIN 4: NC PIN 5: CTL PN 7: OUT- MOSFET switch output. n APPLICATION INFORMATIONS l Current Limit l l l 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. 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. When the chip temperature exceeds 110°C, the thermal protection function works. 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 Thermal Protection - TTL compatible control input. It controls the power switch turnon/turn-off. Active High for AIC1521-1 and active low for AIC1521-0. 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 ■ 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 AIC1521 l SOT-89-5 (unit: mm) D A b1 C b HE E LE SYMBOL MIN MAX A 1.40 1.60 b 0.32 0.52 b1 1.40 1.80 C 0.30 0.50 D 4.40 4.60 E 2.40 2.60 e 300 (TYP) e1 1.50 (TYP) b e1 e l HE 4.20 5.00 LE 0.80 --- SOT-89-5 MARKING Part No. Marking AIC1521-0CW BH01 AIC1521-1CW BH02 9