LTC4353CMS#PBF

OR Controllers, Ideal Diodes Overview

The LTC4353CMS#PBF is a dual low voltage ideal diode controller manufactured by Analog Devices Inc. It controls external N-channel MOSFETs to implement an ideal diode function, replacing high-power Schottky diodes and associated heat sinks. The device operates with supply voltages from 2.9V to 18V and features fast turn-on and turn-off times of approximately 1 microsecond. It includes enable inputs for power management and MOSFET on-status outputs for system monitoring.

OR Controllers, Ideal Diodes Feature Summary

• Controls external N-channel MOSFETs to replace power diodes, reducing board area and power loss
• Regulates forward-voltage drop across the MOSFET to ensure smooth current transfer in diode-OR applications
• Fast turn-on reduces load voltage droop during supply switchover, while fast turn-off minimizes reverse-current transients
• Includes enable inputs to deactivate the MOSFET and enter a low current state

OR Controllers, Ideal Diodes Applications

• Redundant power supplies
• Supply holdup circuits
• High availability systems and servers
• Telecom and network infrastructure

OR Controllers, Ideal Diodes Procurement Notes

Verify the specific package variant against official documentation, as suffixes may indicate different thermal or mechanical specifications. Confirm that the intended application voltage range falls within the 2.9V to 18V operational limits. Ensure external MOSFET selection aligns with the controller's drive capabilities and the required current handling for the target design.

OR Controllers, Ideal Diodes Selection Notes

Select this component when minimizing conduction losses and board space is critical compared to traditional Schottky diode solutions. It is suitable for designs requiring seamless power path switching between multiple sources. Consider the need for external N-channel MOSFETs and verify that the system can accommodate the required gate drive characteristics and status output integration.

OR Controllers, Ideal Diodes Part Context

This part belongs to the LTC4353 family of ideal diode controllers designed for low voltage applications. It serves as a specialized power management IC focused on efficient power routing and redundancy. The device integrates control logic to manage external switches, offering a compact alternative to discrete diode-based OR-ing circuits in modern electronic systems.

OR Controllers, Ideal Diodes Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.