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| AIC1526 Dual USB High-Side Power Switch FEATURES * 110m (5V Input) High-Side MOSFET Switch. 500mA Continuous Load Current per Channel. 110A Typical On-State Supply Current. 1A Typical Off-State Supply Current. Current-Limit / Short Circuit Protection. Thermal Shutdown Protection under Overcurrent Condition. Undervoltage Lockout Ensures that Switch is off at Start Up. Output can be Forced Higher than Input (OffState). Open-Drain Fault Flag. Slow Turn ON and Fast Turn OFF. Enable Active-High or Active-Low. DESCRIPTION The AIC1526 is a dual high-side power switch for self-powered and bus-powered Universal Serial Bus (USB) applications. One high-side switch is a MOSFET with 110m RDS(ON), which meets USB voltage drop requirements for maximum transmission wire length. Multi-purpose indicates open-drain fault flag output thermal over-current limiting, shutdown, or undervoltage lockout for each channel. Output current is typically limited to 1A, well below the 5A safety requirement, and the thermal controls condition. Guaranteed minimum output rise time limits inrush current during hot plug-in, minimizing EMI and preventing the voltage at upstream port from dropping excessively. shutdown each function independently overcurrent channel under APPLICATIONS USB Power Management. Hot Plug-In Power Supplies. Battery-Charger Circuit. Analog Integrations Corporation DS-1526-00 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 AIC1526 TYPICAL APPLICATION CIRCUIT VCC 5.0V 4.50V to 5.25V Upstream VBUS 100mA max VBUS D+ DGND + 1F CIN + 33F AIC1722 IN OUT 10K 10K USB Controller VIN ON/OFF OVERCURRENT OVERCURRENT ON/ GND DATA DATA AIC1526 CTLA FLGA FLGB OUTA IN GND 0.1F + 33F Ferrite Bead VBUS + GND 10F COUT * 0.01F D+ DGND CTLB OUTB * 33F, 16V Tantalum, or 100F, 10V Electrolytic Bold line indicate high- current traces + VBUS 33F * 0.01F D+ DGND DATA Two-Port Self-Powered Hub ORDERING INFORMATION AIC1526-XXX PACKAGE TYPE N: PLASTIC DIP S: SMALL OUTLINE TEMPERATURE RANGE C: 0C~+70C CONTROL POLARITY 0: ACTIVE LOW 1: ACTIVE HIGH ORDER NUMBER AIC1526-0CN AIC1526-1CN (PLASTIC DIP) AIC1526-0CS AIC1526-1CS (PLASTIC SO) PIN CONFIGURATION TOP VIEW CTLA 1 FLGA 2 FLGB 3 CTLB 4 8 OUTA 7 IN 6 GND 5 OUTB ABSOLUTE MAXIMUM RATINGS Supply Voltage (VIN) ........................................................................................... 7.0V ................................................................................. 50mA .................................................................-20C~80C ............................................................... -65C ~ 150C Fault Flag Voltage (VFLG) ....................................................................................... 7.0V Fault Flag Current (IFLG) Control Input (VCTL) ................................................................................. -0.3V ~15V Operating Temperature Range Storage Temperature Range 2 AIC1526 TEST CIRCUIT 10K R1 10K R2 ON 10 VCC +5V CTLA OFF OUTA IN R4 FLGA FLGB ON 0.1F C1 GND 10 CTLB OFF OUTB AIC1526 R4 ELECTRICAL CHARACTERISTICS (VIN= 5V, Ta=25C, unless otherwise specified.) PARAMETERS Supply Current Control Input Voltage Control Input Current Control Input Capacitance Output MOSFET Resistance Output Turn-On Rise Delay Output Turn-On Rise Time Output Turn-Off Delay Output Turn-Off Fall Time Output Leakage Current Current Limit Threshold Overtemperature Shutdown Threshold Error Flag Output Resistance Error Flag Off Current UVLO Threshold TJ Increasing TJ Decreasing VIN = 5V , IL =10 mA VIN = 3.3V , IL =10mA VFLG = 5V VIN Increasing VIN Decreasing 0.6 1.0 135 125 10 15 0.01 2.6 2.4 25 40 1 A V RL = 10 each Output RL = 10 each Output RL = 10 each Output RL = 10 each Output CONDITIONS VCTL =Logic "0" , OUT=Open VCTL =Logic "1" , OUT=Open VCTL =Logic "0" VCTL =Logic "1" VCTL =Logic "0" VCTL =Logic "1" 2.4 0.01 0.01 1 110 100 1000 0.8 0.7 2500 20 20 10 1.25 150 1 1 MIN. TYP. 0.75 110 MAX. 5 160 0.8 UNIT A V A pF m S S S S A A C 3 AIC1526 BLOCK DIAGRAM OUTA FLGA POWER N-MOSFET DRIVER CTLA CHARGE PUMP CURRENT LIMIT CS THERMAL SHUTDOWN UVLO IN CHARGE PUMP CTLB FLGB CURRENT LIMIT CS DRIVER OUTB TYPICAL PERFORMANCE CHARACTERISTICS ON Resistance vs. Supply Voltage 118 116 150 140 Output On Resistance vs. Temperature ON Resistance (m ) 114 112 110 108 106 104 3.0 3.5 RL=47 T=25C ON Resistance (m ) 130 120 110 100 90 80 POWER N-MOSFET RL=47 T=25C Supply Voltage (V) 4.0 4.5 5.0 5.5 -40 -20 0 20 40 60 80 100 Temperature (C) 4 AIC1526 TYPICAL PERFORMANCE CHARACTERISTICS (Continued) UVLO Threshold Voltage vs. Temperature 3.0 160 ON State Supply Current vs. Supply Voltage Threshold Voltage (V) 2.8 140 Rising 2.6 Supply Current (A) 120 2.4 Falling 100 Both Switches ON 80 2.2 2.0 -40 60 -20 0 Temperature (C) 20 40 60 80 100 3 4 5 6 7 8 Supply Voltage (V) OFF State Current vs. Temperature 130 OFF State Current vs. Temperature 0.10 Supply Current (A) Supply Current (A) 120 0.08 110 0.06 Both Switches ON 100 Both Switches OFF 0.04 90 0.02 80 -40 -20 0 20 40 60 80 100 0 -40 -20 0 20 40 60 80 Temperature (C) 100 Temperature (C) OFF State Current vs. Supply Voltage 0.10 1.7 1.6 0.08 Control Threshold vs. Supply Voltage Supply Current (A) 0.06 Enable voltage 1.5 1.4 1.3 1.2 1.1 VEN Rising Both Switches 0.04 VEN Falling 0.02 0 3 4 Supply Voltage (V) 5 6 7 8 1.0 3.0 3.5 4.0 4.5 5.0 5.5 Supply Voltage (V) 5 AIC1526 TYPICAL PERFORMANCE CHARACTERISTICS (Continued) Turn-On, Turn-Off Characteristics 6 Control (V) Outpu (V) 4 2 0 5 3 1 -1 0.0 0.5 1.0 1.5 2.0 2.5 RL=47 Time (mS) PIN DESCRIPTION PIN 1: CTLA - TTL compatible control input. It controls the turn-on/turn-off of channel A MOSFET. Active high for AIC1526-1 and active low for AIC1526-0. PIN 2: FLGA - An active-low and open-drained fault flag output for channel A. It can indicate current limit if CTLA is active. In normal mode operation (CTLA or/and CLTB is active), it also can indicate thermal shutdown or undervoltage. PIN 3: FLGB - An active-low and opendrained fault flag output for channel B. It can indicate current limit if CTLB is active. In normal mode operation (CTLB or/and CLTA is active), it also can indicate thermal shutdown or undervoltage. PIN 4: CTLB - TTL compatible control input. It controls the turn-on/turn-off of channel B MOSFET. Active High for AIC1526-1 and active low for AIC1526-0. PIN 5: OUTB - Channel B MOSFET switch output. PIN 6: GND PIN 7: IN - Chip power ground. - Power supply input. A MOSFET switch PIN 8: OUTA - Channel output. 6 AIC1526 APPLICATION INFORMATION Error Flag An open-drained output of an N-channel MOSFET, the FLG output is pulled low to signal the following fault conditions: input undervoltage, output current limit, and thermal shutdown. the case of overcurrent fault. Supply Filtering A 0.1F to 1F bypass capacitor from IN to GND, located near the device, is strongly recommended to control supply transients. Current Limit The current limit threshold is preset internally. It protects the output MOSFET switches from damage conditions due or to undesirable short circuit often excess inrush current Without a bypass capacitor, an output short may cause sufficient ringing on the input (from supply lead inductance) to damage internal control circuitry. encountered during hot plug-in. The low limit of the current limit threshold of the AIC1526 allows a minimum current of 0.5A through the MOSFET switches. A current limit condition will signal the error flag. 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 hotattachment by filtering high-frequency signals. Thermal Shutdown When the chip temperature exceeds 135C for any reason other than overcurrent fault of either one of the two MOSFET switches, the thermal shutdown function turns off both MOSFET switches and signal the error flag. A hysteresis of 10C prevents the MOSFETs from turning back on until the chip temperature drops to below 125C. However, if thermal shutdown is triggered by chip temperature rise due to overcurrent fault condition of either one of the MOSFET switches, the thermal shutdown function will only turn off the switch that is in overcurrent condition and the other switch can still remain its normal operation. In other words, the thermal shutdown function of the two switches is independent of each other in Short Circuit Transient Bulk capacitance provides the short-term transient current needed during a hot-attachment event. With a 33F, 16V tantalum or 100F, 10V electrolytic capacitor mounted close to downstream connector per port 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. 7 AIC1526 PHYSICAL DIMENSION 8 LEAD PLASTIC SO (unit: mm) D H E e A C A1 SYMBOL A A1 B C D E e H L L MIN MAX 1.35 1.75 0.10 0.25 0.33 0.51 0.19 0.25 4.80 5.00 3.80 4.00 1.27(TYP) 5.80 6.20 0.40 1.27 B 8 LEAD PLASTIC DIP (unit: mm) D E1 E A2 A1 L C eB b e SYMBOL A1 A2 b C D E E1 e eB L MIN MAX 0.381 -- 2.92 4.96 0.35 0.56 0.20 0.36 9.01 10.16 7.62 8.26 6.09 7.12 2.54 (TYP) -- 10.92 2.92 3.81 8 |
Price & Availability of AIC1526
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