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LTC4224-1 - Compact Dual Low Voltage Hot Swap Controller

General Description

The LTC®4224 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 Nchannel MOSFETs and operates with one supply as low as 1V provided the other supply is 2.7V or greater.

Key Features

  • n n n n n n n n n n n 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.

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Full PDF Text Transcription (Reference)

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www.DataSheet4U.com LTC4224-1/LTC4224-2 Compact Dual Low Voltage Hot Swap Controller DESCRIPTION The LTC®4224 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 Nchannel 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 fastacting current limit and timed circuit breakers. A FAULT pin signals overcurrent faults.