LT4256-1IS8#TRPBF

LT4256-1 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 latches off until the UV pin is cycled low. 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