1. Products
  2. Power Monitor, Control, and Protection
  3. Hot Swap Controllers
  4. High Voltage Hot Swap Controllers
  5. LT1640

Data Sheet
JP

Alternative Parts

LT4250
LT4250

Negative 48V Hot Swap Controller

Overview

Features and Benefits

  • Allows Safe Board Insertion and Removal from a Live –48V Backplane
  • Operates from –10V to –80V
  • Programmable Inrush Current
  • Programmable Electronic Circuit Breaker
  • Programmable Overvoltage Protection
  • Programmable Undervoltage Lockout
  • Power Good Control Output

Product Details

The LT1640L/LT1640H is an 8-pin, negative voltage Hot Swap™ controller that allows a board to be safely inserted and removed from a live backplane. Inrush current is limited to a programmable value by controlling the gate voltage of an external N-channel pass transistor. The pass transistor is turned off if the input voltage is less than the programmable undervoltage threshold or greater than the overvoltage threshold. A programmable electronic circuit breaker protects the system against shorts. The PWRGD (LTC1640L) or PWRGD (LTC1640H) signal can be used to directly enable a power module. The LT1640L is designed for modules with a low enable input and the LT1640H for modules with a high enable input.

The LT1640L/LT1640H is available in 8-pin PDIP and SO packages.

Applications

  • Central Office Switching
  • –48V Distributed Power Systems
  • Negative Power Supply Control

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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.

Documentation & Resources

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  • Data Sheets (1)
  • Reliability Data (1)
  • Product Selector Card (1)
  • Technical Articles (1)
    • Document Type

    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.View our quality and reliability program and certifications for more information.

    Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
    LT1640HCN8#PBF Material Declaration Reliability Data 8-Lead PDIP (Narrow 0.3 Inch)
    LT1640HCS8#PBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
    LT1640HCS8#TRPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
    LT1640HIN8#PBF Material Declaration Reliability Data 8-Lead PDIP (Narrow 0.3 Inch)
    LT1640HIS8#PBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
    LT1640HIS8#TRPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
    LT1640LCN8#PBF Material Declaration Reliability Data 8-Lead PDIP (Narrow 0.3 Inch)
    LT1640LCS8#PBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
    LT1640LCS8#TRPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
    LT1640LIN8#PBF Material Declaration Reliability Data 8-Lead PDIP (Narrow 0.3 Inch)
    LT1640LIS8#PBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
    LT1640LIS8#TRPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
    Wafer Fabrication Data R375 Reliability Data

    PCN-PDN Information

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    Select Model for PCN Information
    • LT1640HCN8#PBF Production
    • LT1640HCS8#PBF Production
    • LT1640HCS8#TRPBF Production
    • LT1640HIN8#PBF Production
    • LT1640HIS8#PBF Production
    • LT1640HIS8#TRPBF Production
    • LT1640LCN8#PBF Production
    • LT1640LCS8#PBF Production
    • LT1640LCS8#TRPBF Production
    • LT1640LIN8#PBF Production
    • LT1640LIS8#PBF Production
    • LT1640LIS8#TRPBF Production

    Support & Discussions

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