LT1641IS8#PBF

LT1641 is an 8-pin Hot Swap™ 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 a programmable rate. A high side switch driver controls an N-channel gate for supply voltages ranging from 9V to 80V. The chip features a programmable analogue foldback current limit circuit. If the chip remains in current limit for more than a programmable time, the N-channel pass transistor turns off and is optionally set to automatically restart after a time-out delay. The PWRGD output indicates when the output voltage, sensed by the FB pin, is within tolerance. The ON pin provides programmable undervoltage lockout. It is used in application such as hot board insertion, electronic circuit breaker, industrial high side switch/circuit breaker, 24V/48V industrial/alarm systems etc.

• Controls supply voltage from 9V to 80V
• Programmable analogue foldback current limiting
• High side drive for an external N-channel
• Automatic retry capability
• User programmable supply voltage power-up rate
• Undervoltage lockout, overvoltage protection
• VCC supply current is 2mA typical
• VCC undervoltage lockout is 8.3V typical
• Operating temperature is -40°C to 85°C
• Package style is 8-lead NSOIC

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