LTC1642 Datasheet | Linear Technology

LTC1642 Hot Swap Controller Features - Adjustable Undervoltage and Overvoltage Protection - Foldback Current Limit - Adjustable Current Limit Time-Out - Protected Against Surges to 33V - Single Channel NFET Driver - Latch Off or Automatic Retry on Current Fault - Driver for SCR Crowbar on Overvoltage - Adjustable Reset Timer - Reference Output with Unmitted parator - 16-Pin SSOP Package U APPLICATIO S - Hot Board Insertion - Electronic Circuit Breaker - Infini Band TM Systems DESCRIPTIO The LTC®1642 is a 16-pin Hot Swap TM controller that allows a board to be safely inserted and removed from a live backplane. Using an external N-Channel pass transistor, the board supply voltage can be ramped up at an adjustable rate. A high side switch driver controls the N-Channel gate for supply voltages above 2.97V. The SENSE pin allows foldback limiting of the load current, with circuit breaker action after an adjustable delay time. The delay allows the part to power-up in current limit. The CRWBR output can be used to trigger an SCR for crowbar protection of the load if the input supply exceeds an adjustable threshold. The RESET output can generate a system reset with adjustable delay when the supply voltage falls below an adjustable threshold. The ON pin cycles the board power. The LTC1642 is available in the 16-pin SSOP 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 BACKPLANE 12V PLUG-IN CARD (SHORT PIN) 110k 1% 0.010Ω 5% FDS6630A 100Ω 5% 1N4705 18V 330Ω...