This article introduces the advantages of using MOSFET-based ideal diode solutions, including the LTC4355, LTC4357, and LTC4358. These products can reduce voltage drop and power dissipation, thereby increasing system efficiency.
The article discusses how traditional Schottky ORing diodes reduce available voltage and dissipate significant power in high-current systems. It introduces MOSFET-based ideal diode solutions as a more efficient alternative that reduces heat dissipation and simplifies PCB layout.
Specifically, the document highlights the LTC4358 controller, which includes an internal MOSFET pass element. This device offers lower voltage drop and power loss compared to standard Schottky diodes like the B530C, allowing for smaller packages and eliminating the need for bulky heat sinks in many applications.
The LTC4358 dissipates 0.5W, whereas a comparable Schottky diode dissipates 2W.