LT4356CDE-3#TRPBF

Overview

The LT4356CDE-3#TRPBF is a board mount surge stopper manufactured by Analog Devices Inc. It protects loads from high voltage transients, such as automotive load dumps, by regulating output via an external N-channel MOSFET gate control. The device operates within a wide input voltage range of 4 VDC to 80 VDC and features reverse input protection down to –60V. Key electrical parameters include a shutdown current of 7 µA and a maximum quiescent current of 30 µA. It is housed in a 12-pin DFN package measuring 4 mm x 3 mm with a height of 0.75 mm. The component supports fault latchoff functionality with an adjustable timer.

Feature Summary

• Stops high voltage surges and regulates output during overvoltage events
• Provides reverse input protection to -60V
• Includes adjustable latchoff fault timer and fault output indication
• Features low shutdown current and auxiliary amplifier for level detection

Applications

• Automotive and avionic surge protection
• Hot swap and live insertion systems
• High side switch for battery powered systems

Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging when ordering. Confirm the C-grade temperature rating aligns with your operational requirements. Ensure the external N-channel MOSFET selection matches the surge current capabilities required for your specific application design.

Selection Notes

Select this component for applications requiring robust transient protection without active switching complexity. The integrated fault latchoff prevents repeated stress on downstream components. Consider the auxiliary amplifier for additional monitoring or control logic integration if system architecture demands it.

Part Context

This part belongs to the LT4356 series of Surge Stoppers. It is designed to replace traditional discrete protection circuits, offering a compact solution for sensitive electronics. The device integrates control logic, comparators, and drivers into a single small footprint, simplifying PCB layout and reducing bill of materials.

Replacement Considerations

LT4356CDE-3#PBF (Tube Packaging)

FAQ

What is the function of the auxiliary amplifier?

The auxiliary amplifier can be used for level detection comparator functions or as a controller for linear regulators.

How does the device handle reverse polarity?

The LT4356CDE-3 provides reverse input protection down to -60V, safeguarding the circuit against incorrect power connection.