LTC1643AL-1CGN#PBF Analog Devices

LTC1643AL LTC1643AL-1/LTC1643AH PCI-Bus Hot Swap Controller FEATURES DESCRIPTIO TM Allows Safe Board Insertion and Removal from a The LTC 1643A is a Hot Swap controller that allows a board Live PCI Slot to be safely inserted and removed from a live PCI-Bus slot. Works on either a Motherboard (LTC1643AH) or Two external N-channel transistors control the 3.3V and 5V TM CompactPCI Card (LTC1643AL/LTC1643AL-1) supplies while on-chip switches control the 12V and 12V Controls 12V, 3.3V, 5V, 12V Supplies supplies. All supply voltages can be ramped up at a program- Programmable Foldback Current Limit with mable rate. An electronic circuit breaker protects all four Circuit Breaker supplies against overcurrent faults. The foldback current limit User-Programmable Supply Voltage Power-Up Rate feature limits current spikes and power dissipation when High Side Drive for External N-Channel MOSFETs shorts occur and allows boards with large capacitances to be 12V and 12V On-Chip Switches powered up without tripping the circuit breaker. The PWRGD Fault and Power-Good Outputs output indicates when all of the supply voltages are within Available in a Narrow 16-Lead SSOP Package tolerance and the FAULT output indicates an overcurrent U condition. The ON(LTC1643AH)/ON (LTC1643AL/ APPLICATIO S LTC1643AL-1) pin is used to cycle the board power or reset the circuit breaker. The LTC1643AL-1 has the 12V power PCI-Based Servers good comparators disabled. CompactPCI Compliant Boards The LTC1643A is available in a 16-pin narrow SSOP package. , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. Hot Swap is a registered trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATION Hot Swappable PCI Supply R1 Q1 0.007 IRF7413 5V 5A R6 R2 Q2 10 IRF7413 0.005 3.3V 7.6A GND SYSTEM R5 POWER R7 10 SUPPLY 100 C1 9 10 11 3 13 12 14 0.047F 3V 3V GATE 3V 5V 5V 5V IN SENSE OUT IN SENSE OUT 8 GND 1 12V IN 2 V EEIN 16 5 12V 12V ON OUT 500mA LTC1643AH R3 15 12V V 10k EEOUT PCI 100mA 6 POWER FAULT 4 SYSTEM TIMER R4 C2 CONTROLLER 10k 7 0.1F PWRGD LOGIC RESET RESET 1643A TA01 1643afb 1 U ULTC1643AL LTC1643AL-1/LTC1643AH ABSOLUTE MAXIMUM RATINGS PACKAGE/ORDER INFORMATION (Note 1) ORDER PART NUMBER Supply Voltages TOP VIEW 12V ................................................................ 13.2V LTC1643AHCGN IN V .............................................................. 13.2V 12V 1 16 12V IN LTC1643ALCGN EEIN OUT V 2 15 V Input Voltage (Pin 5) ................ 0.3V to (12V + 0.3V) EEIN EEOUT LTC1643AL-1CGN IN 3V 3 14 5V OUT Output Voltages (Pins 6, 7) ...... 0.3V to (12V + 0.3V) OUT LTC1643AHIGN IN TIMER 4 13 5V IN Analog Voltages LTC1643ALIGN ON/ON* 5 12 5V SENSE (Pins 3, 4, 9, 10 to 14) ........ 0.3V to (12V + 0.3V) LTC1643AL-1IGN IN FAULT 6 11 GATE V ............................................ 13.2V to + 0.3V EEOUT GN PART MARKING 7 PWRGD 10 3V SENSE 12V .............................................. 0.3V to 13.2V OUT 8 9 1643AH GND 3V IN Operating Temperature Range 1643AL GN PACKAGE LTC1643ALC/LTC1643AL-1C/ 16-LEAD NARROW PLASTIC SSOP 643AL1 LTC1643AHC ........................................... 0C to 70C *ON FOR LTC1643AH, 643AHI ON FOR LTC1643AL/LTC1643AL-1 LTC1643ALI/LTC1643AL-1I/ 643ALI T = 150C, = 135C/ W JMAX JA LTC1643AHI ...................................... 40C to 85C 43AL1I Storage Temperature Range ................. 65C to 150C Order Options Tape and Reel: Add TR Lead Temperature (Soldering, 10 sec).................. 300C Lead Free: Add PBF Lead Free Tape and Reel: Add TRPB Lead Free Part Marking: