The LTC®4217 is an integrated solution for Hot Swap™applications that allows a board to be safely inserted andremoved from a live backplane. The part integrates a HotSwap controller, power MOSFET and current sense resistorin a single package for small form factor applications. Adedicated 12V version (LTC4217-12) contains preset 12Vspecifi c thresholds, while the standard LTC4217 allowsadjustable thresholds.The LTC4217 provides separate inrush current controland an accurate (5%) 2A current limit with current foldbacklimiting. The current limit threshold can be adjusteddynamically using an external pin. Additional featuresinclude a current monitor output that amplifi es the senseresistor voltage for ground referenced current sensingand a MOSFET temperature monitor output. Thermal limit,overvoltage, undervoltage and powergood monitoring arealso provided.
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