LTC4380HMS-4#WPBF

Overview

The LTC4380HMS-4#WPBF is a low quiescent current surge stopper manufactured by Analog Devices Inc. It protects loads from transient high voltage events, such as automotive load dump, by clamping the gate voltage of an external N-channel MOSFET. The device features a fixed internal gate clamp voltage of 50V, suitable for 24V/28V systems. It provides overcurrent protection with a fault timer and reverse input protection up to -60V via back-to-back MOSFET control. Operating voltage ranges from 4V to 72V, with a typical operating current of 8µA and shutdown current of 6µA. It is housed in a 10-pin MSOP package.

Feature Summary

• Clamps output voltage during overvoltage transients using an external N-channel MOSFET
• Provides adjustable overcurrent protection with a fault timer based on MOSFET stress
• Enables reverse input protection up to -60V by driving back-to-back MOSFETs
• Features low static current consumption for battery-powered applications

Applications

• Automotive and avionics surge protection
• Industrial load dump protection
• Hot swap and hot plug power distribution
• High voltage side switches for battery-powered systems

Procurement Notes

Verify component authenticity through authorized Analog Devices distributors or direct channels. Confirm the specific suffix #WPBF matches the required 10-pin MSOP packaging and lead-free specifications. Request official datasheets and test reports to validate performance against automotive and industrial standards before integration into final designs.

Selection Notes

Select this model when a fixed 50V gate clamp voltage is appropriate for 24V/28V system architectures. Consider alternative variants if a 31.5V clamp or fully adjustable threshold is required for different voltage levels. Ensure the external MOSFET selection supports the device's current limiting capabilities and thermal requirements within the specified operating temperature range.

Part Context

This component belongs to the LTC4380 family of low quiescent current surge limiters designed for robust power protection. It integrates precise comparator circuits and a fault timer to manage MOSFET stress during abnormal conditions. The series is engineered for high-reliability environments where low standby current and comprehensive transient protection are critical design parameters.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing circuit topologies if considering alternative surge protection controllers from other manufacturers.