High availability system servers, network routers and solid-state drives power circuit boards with multiple power-supply feeds. Model LTC4236 combines (diode-ORs) two power supplies while providing inrush current control, overcurrent protection and current monitoring. For supply ORing, low-loss N-channel MOSFETs replace power Schottky diodes and associated heat sinks, reducing voltage drop, power loss and solution area. The downstream hot-swap MOSFET facilitates safe board insertion and removal from a live backplane. It also protects from short-circuit faults with a fast-acting current-limited circuit breaker. A low offset ground-referenced output signal enables load current measurement with an external analog-to-digital converter.

Linear Technology Corp.