LTC4210-4

FEATURES nn Allows Safe Board Insertion and Removal from a Live Backplane nn Adjustable Analog Current Limit with Circuit Breaker nn Fast Response Limits Peak Fault Current nn Automatic Retry or Latch Off On Current Fault nn Adjustable Supply Voltage Power-Up Rate nn High Side Drive for External MOSFET Switch nn Controls Supply Voltages from 2.7V to 7V nn Undervoltage Lockout nn Adjustable Overvoltage Protection nn Low Profile (1mm) SOT-23 (ThinSOT™) Package APPLICATIONS nn Hot Board Insertion nn Electronic Circuit Breaker nn Industrial High Side Switch/Circuit Breaker LTC4210-3/LTC4210-4 Hot Swap Controller in 6-Lead SOT-23 Package DESCRIPTION The LTC®4210-3/LTC4210-4 is a 6-pin SOT-23 Hot Swap controller that allows a board to be safely inserted and removed from a live backplane. An internal high side switch driver controls the GATE of an external N-channel MOSFET for a supply voltage ranging from 2.7V to 7V. The LTC4210 provides the initial timing cycle and allows the GATE to be ramped up at an adjustable rate. The LTC4210 features a fast current limit loop providing active current limiting together with a circuit breaker timer. The signal at the ON pin turns the part on and off and is also used for the reset function. The LTC4210-3 autoretries on overcurrent fault and the LTC4210-4 latches off on an overcurrent fault. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and ThinSOT is a trademark of Analog Devices, Inc. All other trademarks ar...