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| AIC1523 500mA Power Distribution Switch 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 Output can be Forced Higher than Input (Off-State). l Active-High or Active-Low Enable. n DESCRIPTION The AIC1523 is an integrated high-side power switches for input power selection applications that using in portable products or PCI interface peripheral cards. The high-side switch is a MOSFET with 120m RDS(ON), low voltage drop and low power consumption meet power saving requirements . 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. Design easily and layout flexibility for getting stable voltage in power transfer transition for power selection application. 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 APPLICATIONS l l l l Power Management. PCI Cards With Wake-On- LAN Hot Plug-In Power Supplies. Power Distribution Switch. n TYPICAL APPLICATION CIRCUIT AIC1523-0 VCC 5.0V IN OUT VOUT + 33F 0.1F CTL GND + *33F 0.01 F * 33F, 16V Tantalum, or 100F, 10V Electrolytic Bold line indicate high-current traces High-Side Power Distribution Switch Analog Integrations Corporation www.analog.com.tw DS-1523-00 May 30, 01 TEL: 886-3-5772500 4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC FAX: 886-3-5772510 1 AIC1523 n ORDERING INFORMATION AIC1523-XCX PACKAGING TYPE O: MSOP S: SO8 CONTROL POLARITY 0: Active Low 1: Active High ORDER NUMBER AIC1523-0CO AIC1523-1CO (MSOP8) PIN CONFIGURATION FRONT VIEW NC 1 CTL 2 IN 3 NC 4 8 NC 7 OUT 6 NC 5 GND AIC1523-0CS AIC1523-1CS (SO8) FRONT VIEW NC 1 CTL 2 IN 3 NC 4 8 NC 7 OUT 6 NC 5 GND 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 IN= 5V, Ta=25C, unless otherwise 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 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 AIC1523 n ELECTRICAL CHARACTERISTICS (Continued) PARAMETERS Output Turn-Off Fall Time Output Leakage Current Current Limit Threshold Current Limit Threshold Thermal Limit Vin = 5.0V Vin = 2.4V 0.6 0.6 110 1.0 CONDITIONS RL = 10 MIN. TYP. 0.2 MAX. 10 2 1.25 UNIT S A A A C n BLOCK DIAGRAM CTL OSC. Thermal Protection IN Charge Pump Gate Control Current Limit RS GND GATE NMOS OUT n TYPICAL PERFORMANCE CHARACTERISTICS On-State Supply Current vs. Supply 90 85 85 On-State Supply Current vs. Temperature Supply Current (A) 75 70 65 60 55 50 2.0 Supply Current (A) 80 80 75 70 65 2.5 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 80 100 Supply Voltage (V) Temperature (C) 3 AIC1523 n TYPICAL PERFORMANCE CHARACTERISTICS (Continued) Off-State Supply Current vs. Supply Voltage 4.5 4.0 20 18 16 Off-State Supply Current vs. Temperature Supply Current (nA) 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 Supply Current (nA) 3.5 3.0 2.5 2.0 1.5 1.0 0.5 14 12 10 8 6 4 2 0 -40 -20 0 20 40 60 80 100 Supply Voltage (V) Temperature (C) 130 Output On Resistance vs. Supply Voltage 150 Output On Resistance vs. Temperature Switch_ON Ristance (m) 125 Switch On Resistance (m ) 140 130 120 110 100 90 80 120 115 110 105 100 2.0 2.5 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 80 100 Supply Voltage Temperature (C) 1000 Current Limit vs. Supply Voltage 550 Output Rise Time vs. temperature 900 800 700 600 500 400 2.0 Output Rise Time ( S) Current Limit (mA) 500 450 400 350 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 -40 -20 0 Supply Voltage (V) Temperature (C) 20 40 60 80 100 4 AIC1523 n TYPICAL PERFORMANCE CHARACTERISTICS (Continued ) CTL Threshold Voltage vs. Supply Voltage 2.4 2.2 2.0 1.8 1.6 1.4 1.2 1.0 0.8 0.6 2.0 50 2.5 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 80 100 300 Output Fall Time vs. Temperature CTL rising Output Fall Time (nS) 250 200 150 CTL falling 100 Supply Voltage (V) Temperature ( C) Turn On Rising Time (10 loading) Turn On Characteristic (35 , Loading) 200mA/DIV IOUT 220F 100F I OUT, 200mA/DIV VOUT 426S No Cap CTL CTL Turn Off Falling Time (10 Loading) IOUT 200mA/DIV VOUT 107nS CTL 5 AIC1523 n TYPICAL PERFORMANCE CHARACTERISTICS (Continued) Turn On Characteristic (35 , 100F Loading) 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 VOUT 6 AIC1523 n PIN DESCRIPTION PIN 1/4/6/8: NC: PIN 2: CTL - TTL compatible control input. It controls the power switch turnon/turn-off. Active High for AIC1523-1 and active low for AIC1523-0. PIN 3: INPIN 4: GNDPN 7: OUTPower supply input. Chip power ground. MOSFET switch output. n APPLICATION INFORMATIONS l Current Limit l 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 AIC1523 allows minimum 500mA continuous load current per Channel. l Transient Droop Requirements A current surge is caused by the input capacitance of 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. l Thermal Protection When the chip temperature exceeds 1 10C, the thermal protection function works. l 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 printed circuit boards requires a customized layout to maximize thermal dissipation and to minimize voltage drop and EMI. 7 AIC1523 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 |
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