LTC1647-1/ LTC1647-2/LTC1647-3 Dual Hot Swap Controllers FEATURES DESCRIPTION n Allows Safe Board Insertion and Removal from a The LTC 1647-1/LTC1647-2/LTC1647-3 are dual Hot Live Backplane Swap controllers that permit a board to be safely inserted n Programmable Electronic Circuit Breaker and removed from a live backplane. n FAULT Output Indication Using external N-channel MOSFETs, the board supply n Programmable Supply Voltage Power-Up Rate voltages can be ramped up at a programmable rate. A high n High Side Drive for External MOSFET Switches side switch driver controls the MOSFET gates for supply n Controls Supply Voltages from 2.7V to 16.5V voltages ranging from 2.7V to 16.5V. A programmable n Undervoltage Lockout electronic circuit breaker protects against overloads and shorts. The ON pins are used to control board power or clear a fault. APPLICATIONS The LTC1647-1 is a dual Hot Swap controller with a n Hot Board Insertion common V pin, separate ON pins and is available in an n CC Electronic Circuit Breaker SO-8 package. The LTC1647-2 is similar to the LTC1647-1 n Portable Computer Device Bays but combines a fault status flag with automatic retry at n Hot Plug Disk Drive the ON pins and is also available in the SO-8 package. The L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. Hot Swap is a trademark of Linear Technology Corporation. All other LTC1647-3 has individual V pins, ON pins and FAULT CC trademarks are the property of their respective owners. status pins for each channel and is available in a 16-lead narrow SSOP package. TYPICAL APPLICATION Dual Motherboard Resident Hot Swap Controller ON/OFF Sequence 20m IRF7413 12V V OUT1 SUPPLY (2.5A) + C V LOAD ON 5V/DIV 10 V GATE 10V/DIV 10nF DDZ23* V CC SENSE 1 GATE 1 ON1 ON1 LTC1647-1 V OUT ON2 ON2 5V/DIV 1647-1/2/3 TA01a GND SENSE 2 GATE 2 10ms/DIV DDZ23* 10 10nF 20m V OUT2 (2.5A) + IRF7413 C LOAD *REQUIRED FOR V > 10V CC 1647-1/2/3 TA01 1647fa 1LTC1647-1/ LTC1647-2/LTC1647-3 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) Supply Voltage (V ) ................................................17V Operating Temperature Range CC Input Voltage (SENSE) ................. 0.3V to (V + 0.3V) C-Grade ................................................... 0C to 70C CC Input Voltage (ON) .....................................0.3V to 17V I-Grade ................................................. 40C to 85C Output Voltage (FAULT) ..............................0.3V to 17V Storage Temperature Range ................... 65C to 150C Output Voltage (GATE) ...........Internally Limited (Note 3) Lead Temperature (Soldering, 10 sec) .................. 300C PIN CONFIGURATION TOP VIEW V 1 16 V CC2 CC1 TOP VIEW TOP VIEW ON1 2 15 SENSE1 V 1 8 SENSE1 V 1 8 SENSE1 FAULT1 3 14 SENSE2 CC CC ON1 2 7 SENSE2 ON1/FAULT1 2 7 SENSE2 ON2 4 13 GATE1 FAULT2 5 12 GATE2 ON2 3 6 GATE1 ON2/FAULT2 3 6 GATE1 NC 6 11 NC GND 4 5 GATE2 GND 4 5 GATE2 NC 7 10 NC S8 PACKAGE S8 PACKAGE GND 8 9 NC 8-LEAD PLASTIC SO 8-LEAD PLASTIC SO T = 150C, q = 130C/W T = 150C, q = 130C/W JMAX JA JMAX JA GN PACKAGE 16-LEAD PLASTIC SSOP T = 150C, q = 130C/W JMAX JA ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC1647-1CS8 PBF LTC1647-1CS8 TRPBF 16471 8-Lead (4mm 3mm) Plastic SO 0C to 70C LTC1647-1IS8 PBF LTC1647-1IS8 TRPBF 16471I 8-Lead (4mm 3mm) Plastic SO 40C to 85C 8-Lead (4mm 3mm) Plastic SO LTC1647-2CS8 PBF LTC1647-2CS8 TRPBF 16472 0C to 70C 8-Lead (4mm 3mm) Plastic SO LTC1647-2IS8 PBF LTC1647-2IS8 TRPBF 16472I 40C to 85C LTC1647-3CGN PBF LTC1647-3CGN TRPBF 16473 16-Lead Plastic SSOP 0C to 70C LTC1647-3IGN PBF LTC1647-3IGN TRPBF 16473I 16-Lead Plastic SSOP 40C to 85C Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. For more information on lead free part marking, go to: