Features and Benefits

  • Allows Safe Board Insertion and Removal from a Live Backplane
  • Controls Load Voltages from 1V to 6V
  • No Gate Components Required
  • Adjustable Current Limit with Circuit Breaker
  • Limits Peak Fault Current in ≤1μs
  • No External Timing Capacitor Required
  • Adjustable Supply Voltage Power-Up Rate
  • Gate Drive for External N-channel MOSFET
  • LTC4224-1: Latchoff After Fault
  • LTC4224-2: Automatic Retry After Fault
  • 10-Lead MSOP and 3mm × 2mm DFN Packages

Product Details

The LTC4224 Dual Low Voltage Hot Swap controller allows a board to be safely inserted and removed from a live backplane. It controls two supplies with external N-channel MOSFETs and operates with one supply as low as 1V provided the other supply is 2.7V or greater. The LTC4224 can ramp up the supplies in any order and at adjustable ramp rates. To minimize the number of external components and PCB area, the gate capacitor is optional, all timing delays are generated internally, and the ON pins have integrated pull-up currents.

Protection against overcurrent faults is provided by a fast-acting current limit and timed circuit breakers. A FAULT pin signals overcurrent faults. The LTC4224-1 remains off after a fault, while the LTC4224-2 automatically tries to apply power again after a four second cool-down period.


  • Optical Networking
  • Low Voltage Hot Swap
  • Electronic Circuit Breakers

Product Lifecycle icon-recommended Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

Evaluation Kits (2)

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Product Recommendations

LTC4224 Companion Parts

Recommended Related Parts

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

PCN-PDN Information

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Evaluation Boards

Pricing displayed is based on 1-piece.

Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.