AIC1523 500mA Power Distribution Switch n FEATURES n DESCRIPTION * 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. The AIC1523 is an integrated high-side power distribution switch 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. n APPLICATIONS l l l l Power Management. PCI Cards With Wake-On- LAN Hot Plug-In Power Supplies. Power Distribution Switch. 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 TYPICAL APPLICATION CIRCUIT AIC1523-0 VCC 5.0V IN + 33F VOUT + 0.1F CTL * OUT 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 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-1523-00 032502 1 AIC1523 n ORDERING INFORMATION AIC1523-XCXXX PIN CONFIGURATION PACKING TYPE TR: TAPE & REEL TB: TUBE MSOP8 NC 1 TOP VIEW 8 NC CTL 2 7 OUT IN 3 PACKAGING TYPE O: MSOP S: SO8 CONTROL POLARITY 0: Active Low 1: Active High SO-8 TOP VIEW 6 NC NC 4 5 GND NC 1 8 NC CTL 2 7 OUT IN 3 6 NC NC 4 5 GND Example: AIC1523-0COTR a Active Low Version in MSOP Package & Taping & Reel Packing 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 2 AIC1523 n ELECTRICAL CHARACTERISTICS (Continued) 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 Vin = 5.0V 0.6 Current Limit Threshold Vin = 2.4V 0.6 1.0 A Thermal Limit C 110 n TYPICAL PERFORMANCE CHARACTERISTICS 90 85 80 Supply Current (A) Supply Current (A) 85 75 70 65 60 80 75 70 55 50 2.0 Fig. 1 65 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 Supply Voltage (V) On-State Supply Current vs. Supply Voltage Fig. 2 -20 0 20 40 60 80 100 Temperature (C) On-State Supply Current vs. Temperature 20 4.5 18 3.5 3.0 2.5 2.0 1.5 16 14 12 nt (nA) Supply Current (nA) 4.0 Supply Current (nA) -40 7.5 10 8 6 4 1.0 2 0.5 2.0 Fig. 3 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 Supply Voltage (V) Off-State Supply Current vs. Supply Voltage 7.5 0 -40 Fig. 4 -20 0 20 40 60 Temperature (C) 80 100 Off-State Supply Current vs. Temperature 3 AIC1523 n TYPICAL PERFORMANCE CHARACTERISTICS (Continued) 130 Switch On Resistance (m ) Switch_ON Risistance (m) 150 125 120 115 110 105 140 130 120 110 100 90 80 100 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 -40 7.5 Fig. 5 -20 0 20 40 60 80 100 Temperature (C) Supply Voltage Output On Resistance vs. Supply Voltage Fig. 6 1000 Output On Resistance vs. Temperature 550 Output Rise Time ( S) Current Limit (mA) 900 500 800 700 450 600 400 500 400 2.0 350 2.5 3.0 Fig. 7 3.5 4.0 4.5 5.0 5.5 6.0 6.5 -40 7.0 Supply Voltage (V) Current Limit vs. Supply Voltage -20 Fig. 8 0 20 40 60 80 100 Temperature (C) Output Rise Time vs. temperature 300 2.4 2.0 Output Fall Time (nS) 2.2 CTL rising 1.8 1.6 1.4 1.2 1.0 CTL falling 250 200 150 100 0.8 0.6 2.0 50 2.5 Fig. 9 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 Supply Voltage (V) CTL Threshold Voltage vs. Supply Voltage 7.5 -40 -20 0 20 40 60 Temperature ( C) 80 100 Fig. 10 Output Fall Time vs. Temperature 4 AIC1523 n TYPICAL PERFORMANCE CHARACTERISTICS (Continued ) 200mA/DIV 220F IOUT 100F I OUT, 200mA/DIV VOUT 426S No Cap CTL CTL Fig. 11 Turn On Rising Time (10 loading) Fig. 12 Turn On Characteristic (35, Loading) IOUT 200mA/DIV VOUT 107nS CTL Fig. 13 Turn Off Falling Time (10 Loading) IOUT 500mA/DIV IOUT 500mA/DIV VOUT VOUT CTL CTL Fig. 14 Turn On Characteristic (35, 100F Loading) Fig. 15 Turn Off Falling Time (35 , 100uF Loading) 5 AIC1523 n TYPICAL PERFORMANCE CHARACTERISTICS (Continued) VOUT VOUT 1.2A 1A I OUT I OUT Thermal limit (2 ) loading) 500mA/DIV 500mA/DIV Fig. 16 Fig. 17 Thermal Limiting Transient Response Current Limit Threshold Short VOUT I OUT Thermal Oscillation I OUT 1A/DIV 500mA/DIV V OUT Fig. 18 Short Circuit Testing Fig. 19 Short Circuit Response Time n BLOCK DIAGRAM CTL OSC. Thermal Protection IN Charge Current Limit Pump GND Gate Control RS GATE NMOS OUT 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: IN- Power supply input. PIN 5: GND- Chip power ground. PN 7: OUT- MOSFET switch output. n APPLICATION INFORMATIONS Current Limit Transient Droop Requirements 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. 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. Thermal Protection Short Circuit Transient When the chip temperature exceeds 110C, the thermal protection function works. 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. 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 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