LTC4252CIMS-2#PBF

LTC4252C-2 is a negative voltage Hot Swap™ controller. It allows a board to be safely inserted and removed from a live backplane. Output current is controlled by three stages of current limiting: a timed circuit breaker, active current limiting and a fast feed forward path that limits peak current under worst-case catastrophic fault conditions. Adjustable undervoltage and overvoltage detectors disconnect the load whenever the input supply exceeds the desired operating range. This device’s supply input is shunt regulated, allowing safe operation with very high supply voltages. A multifunction timer delays initial start-up and controls the circuit breaker’s response time. It is widely used in applications such as hot board insertion, electronic circuit breaker, -48V distributed power systems, negative power supply control, central office switching, high availability servers, ATCA etc.

• Floating topology permits very high voltage operation
• Current limit with circuit breaker timer
• Fast response time limits peak fault current, programmable soft-start current limit
• Programmable timer with drain voltage accelerated response
• Improved ruggedness shunt regulator, adjustable undervoltage/overvoltage protection
• Automatic retry after fault
• VIN supply current is 0.9mA typ at (UV = OV = 4V, VIN = VZ – 0.3V)
• VIN undervoltage lockout is 9V typ at (TA = 25°C)
• Operating temperature range from -40°C to 85°C
• Package style is 10-lead plastic MSOP

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