Analog Devices Inc. LTC43xx Ideal Diode-OR Controllers

Analog Devices Inc. LTC43xx Ideal Diode Controllers offer a simple low loss replacement to power Schottky diodes in high current applications. The high-power ideal diodes use N-channel MOSFETs to perform the function of a low forward voltage diode. The use of N-channel MOSFETs provides a more efficient solution and preserves precious board space by reducing the need for heat sinking. Linear control of the forward voltage drop across the MOSFET ensures smooth current delivery without oscillation, even under light loads. A fast <1µs turn-off minimizes reverse current transients if a power source fails or is shorted. Ideal diode controllers and ORing supplies are ideal together providing redundancy in the event of input failure or a hard short. Ideal diodes from Analog Devices Inc. can also be used for output supply holdup during brief interruptions of input power.


  • Preserves board space with reduced need for heat sinking
  • Smooth current delivery without oscillation
  • <1µs turn-off to minimize reverse current transients
Published: 2017-04-26 | Updated: 2022-03-11