LTC4245IUHF#PBF

LTC4245 is a Hot Swap™ controller. It allows a board to be safely inserted and removed from a live backplane in multiple supply systems such as CompactPCI and PCI Express. Using four external N-channel pass transistors, the board supply voltages can be ramped up at an adjustable rate and in any desired sequence. An I²C interface and onboard ADC allow monitoring of board current, voltage and fault status for each supply. It features adjustable dI/dt controlled soft start and foldback limited inrush current. A dual-level timed circuit breaker and fast current limit protect each supply against overcurrent faults. A power good input with timeout allows a down stream supply monitor to disconnect the board supplies. This device can be configured to function without a -12V supply or with an extra 3.3V supply instead of a 5V supply. It is used in application such as live board insertion, CompactPCI, CompactPCI express, CompactTCA, PCI express systems.

• 8bit ADC monitors current and voltage, I²CTM/SMBus interface
• Simultaneous or sequenced turn-on, no external gate capacitor required
• Dual-level circuit breaker and current limit, bus precharge output
• Optional latch off or auto retry after faults, alerts host after faults
• Integrated LOCAL-PCI-RST# logic
• Input supply current is 3mA typ at (TA = 25°C, V12VIN = 12V)
• Gate drive voltage is 6V typ at (TA = 25°C, V12VIN = 12V)
• Conversion time is 665ms typ at (TA = 25°C, V12VIN = 12V)
• Operating temperature range from -40°C to 85°C
• Package style is 38-lead plastic QFN

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party