LT4256-2IS8#PBF

LT4256-2 is a high voltage hot swap controller that allow a board to be safely inserted and removed from a live backplane. It features an adjustable analog foldback current limit. If the supply remains in current limit for more than a programmable time, the N-channel MOSFET shuts off and the PWRGD output asserts low. This device is automatically restarts after a time-out delay. The PWRGD output indicates when the output voltage rises above a programmed level. An external resistor string from VCC provides programmable undervoltage protection. It is widely used in application such as hot board insertion, electronic circuit breaker/power bussing, industrial high side switch/circuit breaker, 24V/48V industrial/alarm systems, ideally suited for 12V, 24V and 48V distributed power systems, 48V telecom systems etc.

• Controls supply voltage from 10.8V to 80V
• Overcurrent fault detection
• Drives an external N-channel MOSFET
• Programmable supply voltage power-up rate
• Operating current 1.8mA typ
• Undervoltage threshold is 4V typ
• Operating temperature is –40°C to 85°C
• Packaging style is 8-lead plastic SO

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