LTC4224-1/LTC4224-2 - Compact Dual Low Voltage Hot Swap Controller
Datasheet Documentation
Datasheet
Reliability Data
Product Selector Card
LT Journal
Press Release
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Overview

Features

  • 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

    • Typical Application

    LTC4224 Typical Application
    LTC4224 Typical Application

    Description

    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.
    Packaging

    3x2 DFN-10,MS-10

    LTC4224 Package Drawing
    LTC4224 Package Drawing
    Order Info

    Package Variations and Pricing

    Part Number Package Pins Temp Price
    (1-99)    		 Price
    (1k)*
    LTC4224CDDB-1#PBF DFN 10 C $3.48
    LTC4224CDDB-1#TRMPBF DFN 10 C $3.48 $2.45
    LTC4224CDDB-1#TRPBF DFN 10 C $2.40
    LTC4224CDDB-2#PBF DFN 10 C $3.48
    LTC4224CDDB-2#TRMPBF DFN 10 C $3.48 $2.45
    LTC4224CDDB-2#TRPBF DFN 10 C $2.40
    LTC4224CMS-1#PBF MSOP 10 C $3.48 $2.40
    LTC4224CMS-1#TRPBF MSOP 10 C $2.46
    LTC4224CMS-2#PBF MSOP 10 C $3.48 $2.40
    LTC4224CMS-2#TRPBF MSOP 10 C $2.46
    LTC4224IDDB-1#PBF DFN 10 I $3.99
    LTC4224IDDB-1#TRMPBF DFN 10 I $3.99 $2.81
    LTC4224IDDB-1#TRPBF DFN 10 I $2.76
    LTC4224IDDB-2#PBF DFN 10 I $3.99
    LTC4224IDDB-2#TRMPBF DFN 10 I $3.99 $2.81
    LTC4224IDDB-2#TRPBF DFN 10 I $2.76
    LTC4224IMS-1#PBF MSOP 10 I $3.99 $2.81
    LTC4224IMS-1#TRPBF MSOP 10 I $2.82
    LTC4224IMS-2#PBF MSOP 10 I $3.99 $2.76
    LTC4224IMS-2#TRPBF MSOP 10 I $2.82
    * The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

    Demo Boards

    Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.


    Part Number Description Price Documentation
    DC1364A-A LTC4224-1 Demoboard: Dual Low Voltage Hot Swap Controller with Latchoff $75.00
    DC1364A-B LTC4224-2 Demoboard: Dual Low Voltage Hot Swap Controller with Auto-Retry $75.00