LTC1646 CompactPCI Dual Hot Swap Controller FEATURES DESCRIPTIO TM Allows Safe Board Insertion and Removal from a The LTC 1646 is a Hot Swap controller that allows a TM Live, CompactPCI Bus board to be safely inserted and removed from a live Controls 3.3V and/or 5V Supplies CompactPCI bus slot. Two external N-Channel transistors Programmable Foldback Current Limit During control the 3.3V and 5V supplies. The supplies can be Power-Up ramped-up in current limit or a programmable rate. Elec- Dual Level Circuit Breakers Protect Supplies from tronic circuit breakers protect both supplies against Overcurrent and Short-Circuit Faults overcurrent fault conditions. The PWRGD output indicates LOCAL PCI RST Logic On-Chip when all of the supply voltages are within tolerance. The PRECHARGE Output Biases I/O Pins During Card OFF/ON pin is used to cycle the board power or reset the Insertion and Extraction circuit breaker. The PRECHARGE output can be used to User Programmable Supply Voltage Power-Up Rate bias the bus I/O pins during card insertion and extraction. 15V High Side Drive for External N-Channel PCI RST is logically combined on-chip with HEALTHY MOSFETS in order to generate LOCAL PCI RST which can be used PWRGD, RESETOUT and FAULT Outputs to reset the CPCI card logic if either of the supply voltages U is not within tolerance. APPLICATIO S The LTC1646 is available in the 16-pin narrow SSOP CompactPCI Bus Removable Boards package. , LTC and LT are registered trademarks of Linear Technology Corporation. Hot Swap is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATIO COMPACT PCI COMPACT PCI BACKPLANE CIRCUIT CARD R2 CONNECTOR CONNECTOR Z1 Z2 0.007 Q1 (MALE) (FEMALE) 1% IRF7413 5V 5V 5A R1 2.7 Q2 LONG 5V 0.005 , 1% IRF7413 3.3V 3.3V 7.6A 0.1F 0.1F 1.8 R4 LONG 3.3V R5 R3 10 1k, 5% V(I/O) 10 C1 89 10 7 12 11 5 0.01F 3V 3V GATE 3V 5V 5V 5V IN SENSE OUT IN SENSE OUT 1.2k 1k 10k 2 15 OFF/ON BD SEL TIMER V(I/O) 0.1F 3k 3 FAULT 3V OUT 3k LTC1646 4 HEALTHY PWRGD 3k 1 16 PCI RST RESETIN RESETOUT GND PRECHARGE DRIVE 613 14 18 1k 18 12 4.7nF 3V 5V IN IN GROUND PRECHARGE OUT MMBT2222A 1V 10% 3V 5V IN 3.3V 10k I = 55mA OUT RESET 10 DATA LINE EXAMPLE I/O PIN 1 I/O PCI BRIDGE (21154) DATA BUS DATA BUS Z1, Z2: BZX84C6V2 1646 F01 Figure 1 1646fa 1 LOCAL PCI RST U ULTC1646 UUW ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1) TOP VIEW Supply Voltages: 5V , 3V ............................................... 10V IN IN RESETOUT 1 16 RESETIN Input Voltages: (Pins 15, 16) ..................... 0.3V to 10V TIMER 2 15 OFF/ON Output Voltages: (Pins 1, 3, 4) .................. 0.3V to 10V FAULT 3 14 DRIVE Analog Voltages and Currents: PWRGD 4 13 PRECHARGE (Pin 9) .................................... 0.3V to (3V + 0.3V) IN 5 5V 12 5V OUT IN (Pins 2, 5, 7, 11, 13, 14) ........ 0.3V to (5V + 0.3V) IN 6 GND 11 5V SENSE (Pin 10) .......................................................... 20mA 7 10 3V GATE OUT Operating Temperature Range: 8 9 3V 3V IN SENSE LTC1646C ............................................... 0C to 70C GN PACKAGE LTC1646I.............................................40C to 85C 16-LEAD PLASTIC SSOP T = 125C, = 135C/W JMAX JA Storage Temperature Range ..................65C to 150C Lead Temperature (Soldering, 10 sec).................. 300C ORDER PART NUMBER GN PART MARKING LTC1646CGN 1646 LTC1646IGN 1646I Order Options Tape and Reel: Add TR Lead Free: Add PBF Lead Free Tape and Reel: Add TRPBF Lead Free Part Marking: