LTC4357HDCB#TRMPBF

OR Controllers, Ideal Diodes Overview

The LTC4357HDCB#TRMPBF is a positive high voltage ideal diode controller manufactured by Analog Devices Inc. It operates within an input voltage range of 9V to 80V and is housed in a 6-lead DFN package measuring 2mm x 3mm. The device features a typical quiescent current of 350µA and an output leakage current of 80µA. It supports a wide operating temperature range from -40°C to +125°C. The component drives an external N-channel MOSFET to replace Schottky diodes, offering a turn-off time of 0.5µs to limit peak fault current.

OR Controllers, Ideal Diodes Feature Summary

• Drives external N-channel MOSFETs to replace Schottky diodes for reduced power consumption
• Provides smooth switchover between power sources without oscillation
• Prevents reverse DC current flow through the controlled MOSFET
• Limits peak fault current with fast 0.5µs turn-off time

OR Controllers, Ideal Diodes Applications

• N+1 redundant power supplies
• High availability systems
• AdvancedTCA systems
• Telecom infrastructure
• Automotive systems

OR Controllers, Ideal Diodes Procurement Notes

Verify the specific suffix HDCB corresponds to the 6-lead DFN (2mm x 3mm) package configuration when sourcing. Confirm that the #TRMPBF designation indicates tape and reel packaging suitable for automated assembly processes. Ensure the manufacturer is identified as Analog Devices Inc. or its predecessor Linear Technology to guarantee component authenticity and datasheet alignment.

OR Controllers, Ideal Diodes Selection Notes

Select this controller for applications requiring high voltage operation up to 80V where low quiescent current is critical. The 6-lead DFN package offers a compact footprint for space-constrained designs. Consider the external MOSFET selection carefully, as the controller performance depends on the drive capability and characteristics of the connected switch. Evaluate thermal requirements given the 125°C maximum junction temperature rating.

OR Controllers, Ideal Diodes Part Context

This component belongs to the LTC4357 series of ideal diode controllers designed for positive voltage applications. It serves as a specialized PMIC solution for OR-ing multiple power sources. The device integrates control logic to manage the gate of an external MOSFET, effectively creating a near-ideal diode behavior with minimal voltage drop compared to traditional semiconductor diodes.

OR Controllers, Ideal Diodes Replacement Considerations

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