LT4220IGN#PBF

LT4220 is a 16-pin dual voltage hot swap controller allows a board to be safely inserted and removed from a live backplane. Using two external N-channel pass transistors, the board supply voltages can be ramped up at an adjustable rate. A selectable tracking mode allows dual supply tracking control for ramping the positive and negative supplies together. It features foldback current limit and latches off both gates if either supply remains in current limit longer than an adjustable time period. The IC can be configured for automatic restart after a delay set by the same timer. A power good signal indicates when the output voltages monitored by the two FB comparators are within tolerance, and the gate drive signals are at their full on voltage. It is widely used in applications such as live board insertion, RAID systems, -5.2V ECL supplies, industrial controls, split supply systems etc.

• Supply tracking mode
• Analog current limit with foldback
• Open-collector power good comparators
• Automatic retry or latch off after a current fault
• Dual undervoltage lockout comparator inputs
• Current fault indication
• VCC operating range is 2.7V to 16.5V
• VCC supply current is 2.7mA typical at (TA = 25°C, VCC = 5V, VEE = -5V)
• Operating temperature is -40°C to 85°C
• Package style is 16-lead plastic SSOP

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