LTC4370IDE#PBF

OR Controllers, Ideal Diodes Overview

The LTC4370IDE#PBF is a two-supply, diode-OR, current balancing controller from Analog Devices. It incorporates MOSFET ideal diodes to share load currents between supplies without requiring a share bus or supply trim pins. The device operates with input supplies ranging from 2.9 V to 18 V and features fast gate turn-on to reduce voltage droop during switchover. It blocks reverse and shoot-through currents during start-up and fault conditions. The component is housed in a 16-lead DFN package measuring 4 mm by 3 mm.

OR Controllers, Ideal Diodes Feature Summary

• Shares load between two supplies by adjusting forward voltage
• Eliminates need for active control of input supplies
• No share bus required for current balancing
• Blocks reverse and shoot-through currents during faults

OR Controllers, Ideal Diodes Applications

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

OR Controllers, Ideal Diodes Procurement Notes

Verify the specific suffix and package configuration against official datasheets before procurement. Confirm operational voltage ranges and enable input requirements for the target application. Check for alternative packaging options if surface mount constraints exist. Ensure compatibility with system ground references and MOSFET selection parameters.

OR Controllers, Ideal Diodes Selection Notes

Select this controller for applications requiring precise current sharing between dual power sources. Consider the 16-lead DFN package for space-constrained designs. Evaluate the need for external VCC supply if rail voltages fall below the specified minimum. Verify that the fast turn-off characteristics meet transient protection requirements for sensitive loads.

OR Controllers, Ideal Diodes Part Context

The LTC4370 belongs to Analog Devices' portfolio of ideal diode controllers. It is designed for high-reliability power distribution where redundancy and efficient load sharing are critical. The device simplifies design by removing the complexity associated with traditional OR-ing diodes and active sharing circuits.

OR Controllers, Ideal Diodes FAQ

Does the LTC4370 require a share bus for load balancing?

No, the LTC4370 shares load currents between supplies without requiring a share bus or trim pins on the supply.

What is the operating voltage range for the input supplies?

The controller operates with supplies from 2.9 V to 18 V. An external supply may be needed at the VCC pin for lower rail voltages.