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Ideal Diode Controller Integrates 5A MOSFET to Replace Lossy Schottky Diodes
The LTC4358 single ideal diode controller is useful in applications where multiple, redundant power supplies are paralleled to provide load sharing. In N+1 redundant systems, the LTC4358 provides a convenient method to OR together an additional supply to safeguard the system in the event one of the N supplies fail. This ORing technique provides necessary isolation for live insertion and removal of converters onto the power bus and to provide isolation from the bus during a hard short. If the power source fails or is shorted, the LTC4358 ensures a fast 500ns turn-off to minimize reverse current transients.
The LTC4358 joins a growing family of ideal diode-OR controllers, including the LTC4355 positive voltage ideal diode-OR, LTC4354 negative voltage ideal diode-OR, and the LTC4357 and LT4352 single ideal diode controllers. See table below for more details.
Specified over the commercial and industrial temperature ranges, the LTC4358 is offered in 4mm x 3mm 14-pin DFN and 16-lead TSSOP packages. Available today, pricing begins at $2.10 each in 1,000 piece quantities.
Summary of Features: LTC4358
-Replaces a Power Schottky Diode
-Internal 20m Ohm N-Channel MOSFET
-0.5us Turn-Off Time Limits Peak Fault Current
-Operating Voltage Range: 9V to 26.5V
-Smooth Switchover without Oscillation
-No Reverse DC Current
-16-Lead TSSOP & 4mm x 3mm 14-Pin DFN Packages
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