LTC4353IDE#TRPBF

OR Controllers, Ideal Diodes Overview

The LTC4353IDE#TRPBF is a dual ideal diode-OR and single hot swap controller manufactured by Analog Devices Inc. It controls external N-channel MOSFETs to implement an ideal diode function, replacing high-power Schottky diodes to save board area and power. The device regulates the forward-voltage drop across the MOSFET for smooth current transfer in diode-or applications. It features fast turn-on to reduce load voltage droop during supply switchover and fast turn-off to minimize reverse-current transients if an input supply fails or is shorted. The controller operates with supplies from 2.9V to 18V.

OR Controllers, Ideal Diodes Feature Summary

• Controls external N-channel MOSFETs to implement low-loss ideal diode functions for power supply oring and holdup applications.
• Regulates forward-voltage drop across the MOSFET to ensure smooth current transfer between parallel power sources.
• Provides fast turn-on and turn-off capabilities to minimize load voltage droop during switchover and reverse-current transients during faults.

OR Controllers, Ideal Diodes Applications

• Power supply oring systems requiring low loss and efficient current sharing.
• Supply holdup applications utilizing external MOSFETs for energy storage management.
• Telecom and network infrastructure equipment requiring redundant power inputs.

OR Controllers, Ideal Diodes Procurement Notes

Verify component authenticity through authorized Analog Devices channels or certified distributors. Confirm the specific suffix matches the required package and temperature grade. Request original manufacturer documentation to validate part history. Ensure handling procedures comply with electrostatic discharge standards for surface-mount devices. Cross-reference ordering information against official datasheets to avoid substitution errors.

OR Controllers, Ideal Diodes Selection Notes

Select this controller when designing systems that require redundant power inputs with minimal voltage drop. Evaluate external N-channel MOSFET selection based on current requirements and thermal constraints. Consider the operating voltage range of 2.9V to 18V for compatibility with system rails. Assess the need for status outputs and enable inputs for system monitoring and control logic integration.

OR Controllers, Ideal Diodes Part Context

This component belongs to the LTC4353 series, which integrates ideal diode and hot swap control functionalities. It is designed for applications demanding high efficiency and reliable power path management. The device replaces traditional diode-based solutions, offering improved performance in terms of power loss and thermal management within compact surface-mount packages.

OR Controllers, Ideal Diodes Replacement Considerations

LTC4353CDE#PBF

OR Controllers, Ideal Diodes FAQ

How does the LTC4353 handle reverse current during a fault condition?

If an input supply fails or is shorted, the controller executes a fast turn-off sequence to minimize reverse-current transients, protecting the system from back-feeding currents.

What is the operational supply voltage range for the LTC4353?

The controller operates with supplies ranging from 2.9V to 18V. If both supplies fall below 2.9V, an external supply is required at the VCC pin.