LTC4357HMS8 Ideal Diode Controller | MOSFET for Power Systems

LTC4357HMS8 Ideal Diode Controller | High-Voltage Diode-OR for Redundant Power Systems

The LTC4357HMS8 is a high-voltage ideal diode controller from Analog Devices that replaces inefficient Schottky diodes in OR-ing, automotive, and telecom redundant-power systems. By driving an external N-channel MOSFET, the chip slashes power loss, heat, and PCB space versus passive Schottky alternatives, while delivering 80V surge protection and 0.5µs fault response — exactly what mission-critical applications need to ride through faults without dropping load.

This is the part to reach for when a design needs near-zero forward drop across a redundant-power feed: dual-PSU OR-ing on a server rail, automotive load-dump protection at 24V/48V, or industrial power redundancy where a Schottky's static loss is unacceptable. With ultra-low 500µA quiescent current and the compact 8-pin MSOP package (3.0mm wide), the LTC4357HMS8 fits cleanly into space- and power-constrained designs.

Ultra-Fast 0.5µs Shutdown | Reverse Current Protection & Low 500µA Operation

• 80V wide input range — perfect for 24V/48V automotive load-dump and industrial power redundancy.
• Near-zero voltage drop — uses external N-MOSFETs to minimise losses versus traditional diodes.
• Anti-oscillation control — ensures smooth current switching in dual-power OR-ing circuits.
• Reverse current blocking — 0.5µs shutdown prevents backflow during short circuits or outages.
• Automotive-grade temperature range (-40°C to +125°C) for harsh deployment environments.

Where the LTC4357HMS8 Fits

Ideal for server farms, base stations, and EV systems, this ADI-sourced IC combines ultra-low quiescent current with robust MSOP-8 packaging for compact, reliable designs. The 9V to 80V input range covers the bulk of industrial and automotive bus voltages, and the fast fault-response time keeps redundant supplies healthy through short-duration disturbances. Pair with an external N-MOSFET sized for the rail current to complete the diode-OR cell.

LTC4357HMS8 Diode Controller Specifications

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Need LTC4357HMS8 in tray quantities for production runs? Email contact@lys-sz.com for bulk pricing and lead times. Worldwide shipping from our Shenzhen warehouse.