LTC4380IMS-3#PBF

Overview

The LTC4380IMS-3#PBF is a low quiescent current surge stopper manufactured by Analog Devices Inc. It protects loads from high voltage transients by clamping the gate voltage of an external N-channel MOSFET. The device operates within a voltage range of 4 VDC to 72 VDC and features a fixed internal gate clamp voltage of 50 V, suitable for 24V/28V systems. It offers overcurrent protection with adjustable fault timers and reverse input protection capabilities. The component is housed in a 10-lead MSOP package measuring 3 mm x 3 mm with a height of 0.86 mm. It supports SMD/SMT mounting and functions reliably across temperatures from -40°C to +85°C.

Feature Summary

• Clamps external N-channel MOSFET gate voltage to limit output during overvoltage events
• Provides overcurrent protection with internal multiplier-based stress limiting
• Drives back-to-back MOSFETs for reverse input protection without Schottky diode losses
• Features accurate undervoltage lockout comparator on the ON pin

Applications

• Automotive load dump protection
• Avionics power bus protection
• Industrial system surge suppression
• Battery-powered always-on applications

Procurement Notes

Verify the specific suffix #PBF indicates lead-free tape and reel or tube packaging as per the manufacturer's latest documentation. Confirm that the IMS-3 variant corresponds to the 50 V fixed clamp specification required for your 24V/28V system design. Ensure compatibility with the MSOP-10 footprint dimensions and thermal requirements during integration.

Selection Notes

Select this component when a fixed 50 V clamp threshold is appropriate for 24V/28V architectures requiring low static current operation. Consider the LTC4380IMS-1#PBF if a lower 31.5 V clamp is needed for 12V systems, or the adjustable versions for voltages exceeding standard thresholds. Evaluate the trade-off between the fixed clamp simplicity and the flexibility of adjustable variants based on transient tolerance levels.

Part Context

This part belongs to the LTC4380 series of low quiescent current surge stoppers designed for high-reliability environments. The series provides robust protection against automotive load dumps and other high-voltage transients. The IMS-3 designation specifically identifies the version with a fixed 50 V internal gate clamp, distinguishing it from the 31.5 V clamp (IMS-1) and adjustable clamp options within the same family.

Replacement Considerations

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