LTC4364HDE-2#PBF

Overview

The LTC4364HDE-2#PBF is a surge stopper with an integrated ideal diode controller, designed to protect sensitive loads from high-voltage transients. It operates within a DC input voltage range of 4V to 80V and can withstand input surges exceeding 100V when the VCC pin is clamped. The device actively limits and clamps output voltage during overvoltage events, such as automotive load dumps, while providing reverse polarity protection up to -40V on the input and -20V on the output. It features automatic retry functionality after a fault condition clears.

Feature Summary

• Integrates ideal diode controller to replace Schottky diodes, minimizing forward voltage drop and power loss during normal operation or input undervoltage conditions.
• Provides comprehensive protection against high-voltage transients, reverse polarity inputs, and output shorts through external N-channel MOSFET control.
• Features automatic retry mode that resumes operation after a three-minute cool-down delay following a fault event, suitable for unattended systems.

Applications

• Protection of sensitive electronic loads in automotive systems against load dump and high-voltage transients
• Industrial power supply input stages requiring robust surge suppression and reverse polarity protection
• Avionics and aerospace equipment power distribution networks subject to severe electrical stress

Procurement Notes

Verify the specific suffix HDE indicates industrial temperature range (-40°C to +125°C) and DE denotes the 14-pin DFN package. Confirm the -2 suffix corresponds to the automatic retry behavior rather than latch-off. Ensure compatibility with external MOSFET selection for current handling requirements. Check for restricted availability status as indicated by distributor listings.

Selection Notes

Select this component when automatic recovery from fault conditions is required without manual intervention. The industrial grade rating makes it suitable for harsh environments where standard commercial parts may fail. Consider the need for external MOSFETs to handle specific current levels and thermal dissipation. Evaluate if the automatic retry timing aligns with system safety protocols before committing to this part number.

Part Context

This part belongs to the LTC4364 family of surge stoppers, which combines overvoltage protection with ideal diode functionality. The HDE variant specifies the industrial temperature range and DFN packaging, distinguishing it from commercial CDE versions. The -2 suffix differentiates it from the -1 latch-off version, offering autonomous fault recovery capabilities essential for remote or inaccessible applications.

Replacement Considerations

LTC4364HDE-1#PBF serves as a substitute if latch-off behavior is preferred over automatic retry. LTC4364CDE-2#PBF offers identical functionality but is rated for commercial temperature ranges only. Verify package compatibility and thermal performance when cross-referencing with other surge stopper families from Analog Devices.