LTC4357MPMS8#TR

OR Controllers, Ideal Diodes Overview

The LTC4357MPMS8#TR is an N+1 ORing controller manufactured by Analog Devices Inc., designed to drive external N-channel MOSFETs for high-voltage power path management. It operates within a supply voltage range of 9V to 80V and supports input/output voltages up to 80V. The device features a typical quiescent current of 500µA and an output leakage current of 80µA. It includes a 300ns turn-off delay time to limit peak fault currents. Packaged in an 8-lead MSOP, it is rated for automotive grade performance and functions across an operating temperature range of -55°C to +125°C.

OR Controllers, Ideal Diodes Feature Summary

• Drives external N-channel MOSFETs to replace diodes, reducing power consumption and heat dissipation in high-voltage applications.
• Provides smooth switchover between power sources without oscillation, ensuring stable operation during redundancy transitions.
• Prevents reverse DC current flow from the load back to the source, maintaining isolation in multi-source systems.

OR Controllers, Ideal Diodes Applications

• N+1 redundant power supplies
• Telecom infrastructure
• Automotive systems

OR Controllers, Ideal Diodes Procurement Notes

Verify the specific suffix #TR indicates tape and reel packaging when ordering. Confirm automotive grade (MP) requirements against system specifications. Ensure the 8-MSOP footprint matches the PCB layout. Check RoHS compliance status with the manufacturer for environmental regulations. Validate that the 9V to 80V operating range aligns with the target application's voltage profile.

OR Controllers, Ideal Diodes Selection Notes

Select this component for high-voltage ideal diode applications requiring N+1 redundancy. Consider the 8-MSOP package size for space-constrained designs. Evaluate the 500µA supply current against low-power system constraints. Verify compatibility with external N-channel MOSFETs for optimal performance. Assess the -55°C to +125°C temperature range for harsh environment suitability.

OR Controllers, Ideal Diodes Part Context

This part belongs to the LTC4357 series of positive high-voltage ideal diode controllers. It is functionally similar to other variants like the LTC4357HDCB but differs in package type, offering an 8-lead MSOP instead of a DFN. The MP designation indicates automotive qualification. It serves as a core control IC for power path management in critical infrastructure.

OR Controllers, Ideal Diodes Replacement Considerations

LTC4357MPMS8#PBF offers the same functionality in tube packaging. LTC4357HDCB#TRPBF provides equivalent control in a 6-lead DFN package. Verify pinout compatibility and thermal characteristics when substituting packages.