LTC4358 - 5A Ideal Diode

Features

  • Replaces a Power Schottky Diode
  • Internal 20mΩ N-Channel MOSFET
  • 0.5μs Turn-Off Time Limits Peak Fault Current
  • Operating Voltage Range: 9V to 26.5V
  • Smooth Switchover without Oscillation
  • No Reverse DC Current
  • Available in 14-Pin (4mm × 3mm) DFN and 16-Lead TSSOP Packages

Typical Application

LTC4358 Typical Application
LTC4358 Typical Application

Description

The LTC4358 is a 5A ideal diode that uses an internal 20mΩ N-channel MOSFET to replace a Schottky diode when used in diode-OR and high current diode applications. The LTC4358 reduces power consumption, heat dissipation, and PC board area.

The LTC4358 easily ORs power supplies together to increase total system reliability. In diode-OR applications, the LTC4358 regulates the forward voltage drop across the internal MOSFET to ensure smooth current transfer from one path to the other without oscillation. If the power source fails or is shorted, a fast turnoff minimizes reverse current transients.

Packaging

CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
Drawing
RoHS
LTC4358CDE#PBF 4x3 DFN-14 DE C 05-08-1708 Yes
LTC4358CDE#TRPBF 4x3 DFN-14 DE C 05-08-1708 Yes
LTC4358CFE#PBF TSSOP-16 FE C 05-08-1663 (BC) Yes
LTC4358CFE#TRPBF TSSOP-16 FE C 05-08-1663 (BC) Yes
LTC4358IDE#PBF 4x3 DFN-14 DE I 05-08-1708 Yes
LTC4358IDE#TRPBF 4x3 DFN-14 DE I 05-08-1708 Yes
LTC4358IFE#PBF TSSOP-16 FE I 05-08-1663 (BC) Yes
LTC4358IFE#TRPBF TSSOP-16 FE I 05-08-1663 (BC) Yes


LTC4358 Package Drawing
LTC4358 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
(1-99)
Price
(1k)*
RoHS
LTC4358CDE#PBF 4x3 DFN-14 C $3.00 $2.10 Yes
LTC4358CDE#TRPBF 4x3 DFN-14 C $2.16 Yes
LTC4358CFE#PBF TSSOP-16 C $3.00 $2.10 Yes
LTC4358CFE#TRPBF TSSOP-16 C $2.16 Yes
LTC4358IDE#PBF 4x3 DFN-14 I $3.60 $2.52 Yes
LTC4358IDE#TRPBF 4x3 DFN-14 I $2.58 Yes
LTC4358IFE#PBF TSSOP-16 I $3.60 $2.52 Yes
LTC4358IFE#TRPBF TSSOP-16 I $2.58 Yes
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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 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
DC1204A LTC4358 Positive High Voltage Ideal Diode Controller with Integrated FET $50.00
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Click here to view our complete list of demo boards

Applications

  • N+1 Redundant Power Supplies
  • High Availability Systems
  • Telecom Infrastructure
  • Automotive Systems

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Design Tools

LTspice

LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice

To launch a ready to run LTspice demonstration circuit for this part:

  • Step 1: If you have not installed LTspice on this computer, download and install LTspice
  • Step 2: Once LTspice is installed, click on the link(s) below to launch the simulation
  • Step 3: If LTspice does not automatically open after clicking the link above, you can instead run the simulation by right clicking on the link and selecting "Save Target As." After saving the file to your computer, start LTspice and open the demonstration circuit by selecting 'Open' from the 'File' menu

To explore other ready to run LTspice demonstration circuits, please visit our Demo Circuits Collection.

Models for the following parts are available in LTspice:
LTC4358

Technical Support