LTC4353CMS#TRPBF

OR Controllers, Ideal Diodes Overview

The LTC4353CMS#TRPBF is a dual ideal diode controller manufactured by Analog Devices Inc., designed to manage external N-channel MOSFETs for power supply oring and holdup applications. It replaces high-power Schottky diodes, reducing board area and heat sink requirements. The device operates with input supplies ranging from 2.9V to 18V. Key electrical characteristics include fast turn-on times to minimize load voltage droop during supply switchover and rapid turn-off capabilities to limit reverse-current transients when inputs fail or short. The controller features enable inputs for low current shutdown and status outputs indicating MOSFET states.

OR Controllers, Ideal Diodes Feature Summary

• Replaces high-power Schottky diodes to save power and board space
• Regulates forward-voltage drop across MOSFETs for smooth current transfer
• Fast turn-on reduces load voltage droop during supply switchover
• Fast turn-off minimizes reverse-current transients during failure

OR Controllers, Ideal Diodes Applications

• Power supply oring
• Supply holdup applications
• Telecom and network infrastructure

OR Controllers, Ideal Diodes Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging configuration. Confirm the CMS package variant matches the required footprint. Check current availability as distribution may be limited. Ensure external N-channel MOSFET selection aligns with the controller's drive capabilities and thermal requirements for the target application.

OR Controllers, Ideal Diodes Selection Notes

Select this component for applications requiring efficient power path management without the losses associated with traditional diodes. It is suitable where board space is constrained and thermal management of Schottky diodes is challenging. Consider the 2.9V to 18V operating range and the need for external MOSFETs. Evaluate if the fast switching speeds meet the transient response requirements of the system.

OR Controllers, Ideal Diodes Part Context

The LTC4353 belongs to Linear Technology's (now Analog Devices) portfolio of power path and protection solutions. It is part of a family of controllers designed to optimize efficiency in multi-supply systems. The device leverages advanced control algorithms to manage MOSFET conduction precisely, offering a modern alternative to passive diode-based oring circuits in industrial and telecom environments.

OR Controllers, Ideal Diodes Replacement Considerations

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