LTC4380HMS-3#WPBF

Overview

The LTC4380HMS-3#WPBF is a low quiescent current surge stopper manufactured by Analog Devices Inc. It protects loads from transient high-voltage damage, such as automotive load dump events, by clamping the gate voltage of an external N-channel MOSFET. The device features a fixed internal gate clamp voltage of 50 V, suitable for 24V/28V systems. It operates within a wide input voltage range of 4 V to 72 V and draws only 8 μA of working current. The component includes overcurrent protection with adjustable fault timers and reverse input protection capabilities.

Feature Summary

• Clamps external N-channel MOSFET gate voltage to limit output during overvoltage transients
• Provides overcurrent protection with adjustable failure timer based on MOSFET stress
• Drives back-to-back MOSFETs to eliminate voltage drop associated with Schottky diodes
• Features UV detection comparator and shutdown pin for ultra-low static current

Applications

• Automotive load dump protection
• Industrial surge suppression
• Avionics power distribution
• Battery-powered system high-side switching

Procurement Notes

Verify the specific suffix against official Analog Devices documentation to confirm the fixed 50 V gate clamp characteristic. Ensure the MSOP-10 package matches the design requirements. Confirm RoHS compliance status through the manufacturer's latest environmental reports. Cross-reference the part number with authorized distributors to ensure authenticity and traceability.

Selection Notes

Select this variant when a fixed 50 V gate clamp is required for 24V/28V automotive or industrial systems. Choose this part over adjustable versions if system design does not require custom clamping thresholds. Consider the 8 μA quiescent current for battery-sensitive applications. Verify that the external MOSFET can withstand the specified voltage limits.

Part Context

This component belongs to the LTC4380 family of low quiescent current surge stoppers. It is designed for board-mount applications requiring robust protection against high-voltage transients. The series supports various packages including DFN and MSOP, catering to different thermal and space constraints in power management designs.

Replacement Considerations

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