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Data Sheet
JP
User Guides
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Alternative Parts

LTC4353
LTC4353

Dual Low Voltage Ideal Diode Controller

LTC4370
LTC4370

Two-Supply Diode-OR Current Balancing Controller

Overview

Features and Benefits

  • Low Loss Replacement for Power Diode
  • Controls N-Channel MOSFET
  • 0V to 18V Supply ORing or Holdup
  • 0.5μs Turn-On and Turn-Off Time
  • Undervoltage and Overvoltage Protection
  • Open MOSFET Detect
  • Status and Fault Outputs
  • Hot Swappable
  • Reverse Current Enable Input
  • 12-Pin MSOP and DFN (3mm × 3mm) Packages

Product Details

The LTC4352 creates a near-ideal diode using an external N-channel MOSFET. It replaces a high power Schottky diode and the associated heat sink, saving power and board area. The ideal diode function permits low loss power ORing and supply holdup applications.

The LTC4352 regulates the forward voltage drop across the MOSFET to ensure smooth current transfer in diode-OR applications. A fast turn-on reduces the load voltage droop during supply switch-over. If the input supply fails or is shorted, a fast turn-off minimizes reverse currents.

The controller operates with supplies from 2.9V to 18V. For lower voltages, an external supply is needed at the VCC pin. Power passage is disabled during undervoltage or overvoltage conditions. The controller also features an open MOSFET detect circuit that flags excessive voltage drop across the pass transistor in the on state. A REV pin enables reverse current, overriding the diode behavior when desired.

Applications

  • Redundant Power Supplies
  • Supply Holdup
  • Telecom Infrastructure
  • Computer Systems and Servers

Product Categories

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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 (1)

Documentation & Resources

  • View All (10)
  • Data Sheets (1)
  • Reliability Data (1)
  • User Guides (1)
  • Product Selection Guide (1)
  • Videos (1)
  • Design Notes (1)
  • Press Releases (2)
  • Technical Articles (2)
    • Document Type

    Tools & Simulations

    LTspice

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    LTspice

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    LTC4352

    Reference Designs (5)

    Product Recommendations

    LTC4352 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.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
    LTC4352CDD#PBF Material Declaration Reliability Data 12-Lead DFN (3mm x 3mm w/ EP)
    LTC4352CDD#TRPBF Material Declaration Reliability Data 12-Lead DFN (3mm x 3mm w/ EP)
    LTC4352CMS#PBF Material Declaration Reliability Data 12-Lead MSOP
    LTC4352CMS#TRPBF Material Declaration Reliability Data 12-Lead MSOP
    LTC4352HDD#PBF Material Declaration Reliability Data 12-Lead DFN (3mm x 3mm w/ EP)
    LTC4352HDD#TRPBF Material Declaration Reliability Data 12-Lead DFN (3mm x 3mm w/ EP)
    LTC4352HMS#PBF Material Declaration Reliability Data 12-Lead MSOP
    LTC4352HMS#TRPBF Material Declaration Reliability Data 12-Lead MSOP
    LTC4352IDD#PBF Material Declaration Reliability Data 12-Lead DFN (3mm x 3mm w/ EP)
    LTC4352IDD#TRPBF Material Declaration Reliability Data 12-Lead DFN (3mm x 3mm w/ EP)
    LTC4352IMS#PBF Material Declaration Reliability Data 12-Lead MSOP
    LTC4352IMS#TRPBF Material Declaration Reliability Data 12-Lead MSOP
    Wafer Fabrication Data R536 Reliability Data

    PCN-PDN Information

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    Select Model for PCN Information
    • LTC4352CMS#PBF Production
    • LTC4352CMS#TRPBF Production
    • LTC4352HMS#PBF Production
    • LTC4352HMS#TRPBF Production
    • LTC4352IMS#PBF Production
    • LTC4352IMS#TRPBF Production

    Support & Discussions

    LTC4352 Discussions

    LT8490 charging will not initiate
    RE: ESD Rating LTC4352
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    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.

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