Alternative Parts

  • LTC4357
    LTC4357

    Positive High Voltage Ideal Diode Controller

  • LTC4371
    LTC4371

    Dual Negative Voltage Ideal Diode-OR Controller and Monitor

New Content (1)

Overview

Features and Benefits

  • Replaces Power Schottky Diodes
  • Controls N-Channel MOSFETs
  • 0.3μs Turn-Off Time Limits Peak Fault Current
  • Wide Operating Voltage Range: 9V to 80V
  • Smooth Switchover without Oscillation
  • No Reverse DC Current
  • Monitors VIN, Fuse, and MOSFET Diode
  • Available in 14-Lead (4mm × 3mm) DFN, 16-Lead MS and SO Packages

Product Details

The LTC4355 is a positive voltage ideal diode-OR controller that drives two external N-channel MOSFETs. Forming the diode-OR with N-channel MOSFETs instead of Schottky diodes reduces power consumption, heat dissipation and PC board area.

With the LTC4355, power sources can easily be ORed together to increase total system reliability. The LTC4355 can diode-OR two positive supplies or the return paths of two negative supplies, such as in a –48V system.

In the forward direction the LTC4355 controls the voltage drop across the MOSFET to ensure smooth current transfer from one path to the other without oscillation. If a power source fails or is shorted, fast turnoff minimizes reverse current transients.

Power fault detection indicates if the input supplies are not in regulation, the inline fuses are blown, or the voltages across the MOSFETs are greater than the fault threshold.

Applications

  • High Availability Systems
  • AdvancedTCA® (ATCA) Systems
  • +48V and –48V Distributed Power Systems
  • Telecom Infrastructure

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.

Evaluation Kits (1)

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LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

LTspice

Models for the following parts are available in LTspice:

LTC4355

Product Recommendations

LTC4355 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.

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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 Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


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Evaluation Boards Pricing displayed is based on 1-piece.
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.