18 V dual ideal diode controller that enables low loss ORing of multiple power sources with minimal disturbance to supply voltages.
Features and USP: The LTC4353 regulates forward voltage drops across external N-channel MOSFETs to ensure smooth current transfer between supplies in diode-OR applications. In low voltage systems, a slow handoff between controllers results in a voltage drop during supply switchover. The fast <1µs turn-on time of the LTC4353 ensures smooth switchover from one path to the other without oscillation. In the event the input supply fails or is shorted, a fast turn-off minimises reverse current. In addition to redundant power supply ORing, the LTC4353 makes an excellent diode replacement in supply hold up applications where the momentary collapse of the supply voltage is isolated from the load.
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