LT4363CMS-2#TRPBF

Overview

The LT4363CMS-2#TRPBF is a high-voltage surge stopper with current limit, designed for automotive applications. It operates within a supply voltage range of 4V to 80V and features an external MOSFET configuration. The device provides overcurrent protection, under-voltage lockout, and overvoltage clamping protection. It is housed in a 12-lead MSOP package measuring 4.04mm x 3.00mm with a height of 0.75mm. The component supports operation temperatures from -40°C to +125°C and is RoHS compliant.

Feature Summary

• Integrates high-voltage surge stopping capability with built-in current limiting to protect downstream circuitry from input transients.
• Automatically retries after fault conditions cool down, with retry inhibition if output voltage exceeds specific thresholds.
• Utilizes an external MOSFET to handle high power dissipation while maintaining compact board space through the MSOP-12 package.

Applications

• Automotive electronics requiring robust surge protection
• Avionics systems needing reliable power input conditioning
• Industrial equipment demanding high-voltage transient suppression

Procurement Notes

Verify that the specific suffix #TRPBF corresponds to the tape-and-reel packaging format required for automated assembly processes. Confirm that the CMS variant meets the extended temperature range specifications necessary for your application environment. Ensure compatibility with the external MOSFET selection based on the current and voltage ratings defined in the official datasheet.

Selection Notes

Select this component when designing circuits that require automatic recovery from overvoltage or overcurrent events without manual reset. The LT4363CMS-2#TRPBF is suitable for systems where sustained faults must be managed via internal timer delays and cool-down periods. Consider the external FET requirements for thermal management and ensure the input voltage range aligns with the system's nominal and transient levels.

Part Context

This part belongs to the LT4363 series of high-voltage surge stoppers manufactured by Analog Devices. The series includes variants with different packages and temperature ranges, such as IDE, IS, and IMS options. The LT4363 family is engineered to replace traditional diode-based protection schemes, offering superior performance in managing large surges while minimizing power loss during normal operation.

Replacement Considerations

LT4363IDE-2#TRPBF

FAQ

How does the LT4363CMS-2#TRPBF handle sustained overvoltage conditions?

The device turns off after a timer delay upon detecting sustained overvoltage or overcurrent conditions. For the LT4363-2 variant, it automatically retries after a cool-down delay, provided the output voltage does not exceed 1.275V during the retry inhibition phase.

What is the role of the external MOSFET in this surge stopper?

The external MOSFET acts as the primary switching element controlled by the LT4363IC. It handles the main current flow and power dissipation, allowing the IC to manage the surge stopping and current limiting functions efficiently while keeping the IC itself protected from excessive heat.