LTC4240 CompactPCI Hot Swap 2 Controller with I C Compatible Interface FEATURES DESCRIPTIO TM n Allows Safe Board Insertion and Removal from a The LTC 4240 is a Hot Swap controller that allows a board TM Live CompactPCI Bus to be safely inserted and removed from a live CompactPCI TM 2 n 2 I C Compatible 2-Wire Interface bus slot. The LTC4240 has a built-in 2-wire I C compatible n PRECHARGE Output Biases I/O Pins During Card interface to allow software control and monitoring of Insertion and Extraction device function and power supply status. Two external n Controls 3.3V, 5V, 12V and 12V Supplies N-channel transistors control the 3.3V and 5V supplies, n Foldback Current Limit with Circuit Breaker while two internal switches control the 12V and 12V n LOCAL PCI RST Logic On-Board supplies. Electronic circuit breakers protect all four supplies n QuickSwitch Enable Output against overcurrent faults. The PWRGD output indicates n Status LED Driver when all of the supply voltages are within tolerance. The n User Programmable Supply Voltage Power-Up Rate n OFF/ON pin is used to cycle the board power or reset the Registers Individual Supply Faults 2 n circuit breaker. The I C interface allows the user to turn the Available in a 28-Pin Narrow SSOP Package U device off or on, set RESETOUT, turn on the status LED APPLICATIO S driver and ignore 12V, 12V faults. It also allows the user to read the status of the FAULT, RESETIN, RESETOUT, n Hot Board Insertion into CompactPCI Bus PWRGD, PRSNT1 and PRSNT2 pins. Under a fault n Electronic Circuit Breaker 2 condition, the I C interface can also be used to determine , LTC and LT are registered trademarks of Linear Technology Corporation. Hot Swap is a trademark of Linear Technology Corporation. which of the four supplies generated the fault. The LTC4240 QuickSwitch is a registered trademark of Quality Semiconductor Corp. CompactPCI is a trademark of the PCI Industrial Computer Manufacturers Group. is available in a 28-pin narrow SSOP package. 2 I C is a trademark of Philips Electronics N.V. TYPICAL APPLICATIO CompactPCI CompactPCI BACKPLANE BACKPLANE C11 CONNECTOR CONNECTOR 10nF R2 Q2 (MALE) (FEMALE) 0.007 Z4 Z3 Si7880DP 5V IN 5V OUT MEDIUM 5V R1 + 5V AT 5A R22, 2.74 Q1 C (5V ) LONG 5V LOAD OUT 0.005 Si7880DP 3V IN 3V OUT MEDIUM 3.3V + 3.3V AT 7.6A R21, 1.74 C7 C8 R19 LONG 3.3V C (3V ) LOAD OUT 0.01F 0.01F 2.55k C1 C10 PER PER R3 R4 1% R5 0.047F 10nF PIN PIN 5V 10 10 IN 1k R20 LONG V(I/O) C9 1.91k 1% 10nF 3V 3V GATE 3V 5V 5V 5V R12 IN SENSE OUT IN SENSE OUT R10 10k ADDRIN 100 DGND R25, 1.2k SCL SCL R28, 200 SDA SDA LED PRSNT2 12V OUT PRSNT1 12V OUT 12V AT 500mA + 12V 12V IN C (12V ) LOAD OUT 12V V EEIN LTC4240 V EEOUT V R18 EEOUT 5V 12V AT 100mA IN 1k R17, 1.2k TIMER C (V ) C2 LOAD EEOUT BD SEL OFF/ON + 0.1F EARLY TO FAULT Z1 V(I/O) BE QUICKSWITCH R15 R29 R16 ENABLE 2k 10 10k HEALTHY PWRGD RESETOUT 3V OUT PCI RST RESETIN R6 C6 R30 LOCAL PCI RST GND PRECHARGE DRIVE 10k 0.01F 1k R13 R14 Z2 TO PCI BRIDGE 10 10 R8, 1k R9 DEVICE OR C4 C5 Z1, Z2: SMAJ12CA R11 C3, 4.7nF EQUIVALENT 18 24 R7, 12 0.01F 0.01F Z3, Z4: IPMT5.0AT3 3V GROUND IN Q3 4240 TA01 MMBT2222A 4240f 1 U ULTC4240 UUW ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Notes 1, 2) ORDER PART Supply Voltages TOP VIEW NUMBER 5V .................................................................... 0.3V to 12V PRSNT1 1 28 OFF/ON IN 12V ................................................................. 0.3V to 14V PRSNT2 2 27 RESETIN IN LTC4240CGN V ................................................................... 0.3V to 14V 12V 3 26 12V OUT IN EEIN LTC4240IGN V 4 25 V Input Voltages EEOUT EEIN TIMER 5 24 3V OUT PRSNT1 , PRSNT2 , SCL, RESETIN, 5V 6 23 3V SENSE OUT OFF/ON .................................................. 0.3V to 12V FAULT 7 22 3V IN 5V , 5V , 3V , OUT SENSE IN PWRGD 8 21 5V IN 3V , 3V ............................ 0.3V to (5V + 0.3V) SENSE OUT IN BE 9 20 5V SENSE ADDRIN, PRECHARGE ......................... 0.3V to 5V IN 10 19 GATE GND Output Voltages 11 18 PRECHARGE ADDRIN TIMER, FAULT, PWRGD, SDA, RESETOUT, 12 17 DRIVE SDA LED, DRIVE, GATE, 12V ....................... 0.3V to 14V OUT 13 16 DGND SCL V ................................................................ 14V to 0.3V EEOUT 14 15 LED RESETOUT BE ............................................. 0.3V to (5V + 0.3V) IN GN PACKAGE Operating Temperature Range 28-LEAD PLASTIC SSOP T = 140C, = 135C/W JMAX JA LTC4240C ............................................... 0C to 70C LTC4240I.............................................40C to 85C Consult LTC Marketing for parts specified with wider operating temperature ranges. Storage Temperature Range .................... 65C to 150C Lead Temperature (Soldering, 10 sec).................. 300C ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T = 25C. 12V = 12V, V = 12V, V = 3.3V, V = 5V unless otherwise noted. A IN EEIN 3VIN 5VIN SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS I V Supply Current OFF/ON = 0V l 38 mA DD 12VIN V Undervoltage Lockout 12V l 7.00 8.00 10.80 V LKO IN 5V l 4.10 4.3 4.45 V IN 3V l 2.35 2.45 2.55 V IN V l 9 10.5 V EEIN V Foldback Current Limit Voltage V = (V V ), V = 0V, TIMER = 0V l 15 25 35 mV FB FB 5VIN 5VSENSE 5VOUT V = (V V ), V = 3V, TIMER = 0V l 55 70 85 mV FB 5VIN 5VSENSE 5VOUT V = (V V ), V = 0V, TIMER = 0V l 15 25 35 mV FB 3VIN 3VSENSE 3VOUT V = (V V ), V = 2V, TIMER = 0V l 55 65 80 mV FB 3VIN 3VSENSE 3VOUT V Circuit Breaker Trip Voltage V = (V V ), V = 5V, TIMER = Open l 50 55 60 mV CB TV 5VIN 5VSENSE 5VOUT V = (V V ), V = 0V, TIMER = Open l 611 16 mV TV 5VIN 5VSENSE 5VOUT V = (V V ), V = 3.3V, TIMER = Open l 50 55 60 mV TV 3VIN 3VSENSE 3VOUT = (V V ), V = 0V, TIMER = Open l 611 16 mV V TV 3VIN 3VSENSE 3VOUT t Overcurrent Fault Response Time (V V ) = 100mV, TIMER = Open l 25 35 55 s OC 5VIN 5VSENSE Overcurrent Fault Response Time (V V ) = 100mV, TIMER = Open l 25 35 55 s 3VIN 3VSENSE t Short-Circuit Response Time (V V ) = 200mV, TIMER = Open l 25 35 55 s SC 5VIN 5VSENSE (V V ) = 200mV, TIMER = Open l 25 35 55 s 3VIN 3VSENSE I GATE Pin Turn-On Current OFF/ON = 0V, V = 0V, TIMER = 0V l 20 65 100 A GATE(UP) GATE I GATE Pin Turn-Off Current V = 5V, (Note 3) l 100 200 300 A GATE(DN) GATE I GATE Pin Fault-Off Current OFF/ON = 0V, V = 2V, TIMER = Open, FAULT = 0V l 2.5 6 8.5 mA GATE(FAULT) GATE V External Gate Voltage V = (V V ), I = 1A l 600 1000 mV GATE GATE 12VIN GATE GATE 4240f 2 U WWW