Features and Benefits

  • Adjustable Undervoltage and Overvoltage Protection
  • Foldback Current Limit
  • Adjustable Current Limit Time-Out
  • VCC: 2.97V to 16.5V Normal Operation, Protected Against Surges to 33V
  • Single Channel NFET Driver
  • Latch Off or Automatic Retry on Current Fault
  • Driver for SCR Crowbar on Overvoltage
  • Adjustable Reset Timer
  • Reference Output with Uncommitted Comparator
  • 16-Pin SSOP Package

Product Details

The LTC1642A is a 16-pin Hot Swap™ controller that allows a board to be safely inserted and removed from a live backplane. Using an external N-Channel pass transistor, the board supply voltage can be ramped up at an adjustable rate. A high side switch driver controls the N-Channel gate for supply voltages ranging from 2.97V to 16.5V.

The SENSE pin allows foldback limiting of the load current, with circuit breaker action after an adjustable delay time. The delay allows the part to power-up in current limit. The CRWBR output can be used to trigger an SCR for crowbar protection of the load if the input supply exceeds an adjustable threshold. The RESET output can generate a system reset with adjustable delay when the supply voltage falls below an adjustable threshold. The ON pin cycles the board power. The LTC1642A is available in the 16-pin SSOP package.

LTC1642A Recommended for application where VCC is Higher than 12V


  • Hot Board Insertion
  • Electronic Circuit Breaker
  • InfiniBand Systems

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Product Recommendations

LTC1642A Companion Parts

Recommended Related Parts

Reference Materials

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

Sample & Buy

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