LT4356MP-1
LT4356MP-2

RECOMMENDED FOR NEW DESIGNS

Surge Stopper

Part Models: 7
1ku List Price: Starting From $8.04

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Overview

Stops High Voltage Surges
Adjustable Output Clamp Voltage
Overcurrent Protection
Wide Operation Range: 4V to 80V
Reverse Input Protection to –60V
Low 7μA Shutdown Current, LT4356-1
Adjustable Fault Timer

Controls N-channel MOSFET
Shutdown Pin Withstands –60V to 100V
Fault Output Indication
Guaranteed Operation –55°C to 125°C
Auxiliary Amplifier for Level Detection Comparator or Linear Regulator Controller
Available in 10-Pin MSOP or 16-Pin SO Packages

The LT4356 surge stopper protects loads from high voltage transients. It regulates the output during an overvoltage event, such as load dump in automobiles, by controlling the gate of an external N-channel MOSFET. The output is limited to a safe value thereby allowing the loads to continue functioning. The LT4356MP also monitors the voltage drop between the V_CC and SNS pins to protect against overcurrent faults. An internal amplifier limits the current sense voltage to 50mV. In either fault condition, a timer is started inversely proportional to MOSFET stress. If the timer expires, the FLT pin pulls low to warn of an impending power-down. If the condition persists, the MOSFET is turned off. After a cooldown period, the GATE pin pulls up turning on the MOSFET again.

The auxiliary amplifier may be used as a voltage detection comparator or as a linear regulator controller driving an external PNP pass transistor.

Back-to-back FETs can be used in lieu of a Schottky diode for reverse input protection, reducing voltage drop and power loss. A shutdown pin reduces the quiescent current to less than 7μA for the LT4356-1 during shutdown. The LT4356-2 differs from the LT4356-1 during shutdown by reducing the quiescent current to 60μA and keeping alive the auxiliary amplifier for uses such as an undervoltage lockout or always-on regulator.


	LT4356-1 LT4356MP-1	LT4356-2 LT4356MP-2	LT4356-3 LT4356MP-3
Low Current Shutdown	7uA	60uA	7uA
Aux Amp In Shutdown	OFF	Always Alive	OFF
Fault Retry	Retry	Retry	Latch Off
Packages	DFN-12, MS-10, SO-16	DFN-12, SO-16	DFN-12, MS-10, SO-16
Temp Grades	C, I, H, MP	C, I, H, MP	C, I, H, MP

Applications

Automotive/Avionic Surge Protection
Hot Swap/Live Insertion
High Side Switch for Battery Powered Systems

Part Models: 7
1ku List Price: Starting From $8.04

Documentation

Data Sheet 1

LT4356MP-1/LT4356MP-2: Surge Stopper Data Sheet 01/11/2012

Technical Articles 1

Surge Stopper IC Simplifies Design of Intrinsic Safety Barrier for Electronics Destined for Hazardous Environments 09/01/2009

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LT4356MPMS-1	10-Lead MSOP	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LT4356MPMS-1#PBF	10-Lead MSOP	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LT4356MPMS-1#TRPBF	10-Lead MSOP	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LT4356MPS-1#PBF	16-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LT4356MPS-1#TRPBF	16-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LT4356MPS-2#PBF	16-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LT4356MPS-2#TRPBF	16-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Oct 11, 2022 - 22_0244 Epoxy Change from Henkel 8290 to 8290A for MSOP Package
		PCN22_0244_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LT4356MPMS-1	PRODUCTION
Feb 4, 2020 - 20_0130 Laser Top Mark Conversion for 10-Lead MSOP Packages Assembled in ADPG and UTAC
		PCN20_0130_Form Material_Report
LT4356MPMS-1	PRODUCTION
LT4356MPMS-1#PBF	PRODUCTION
LT4356MPMS-1#TRPBF	PRODUCTION
Jun 5, 2024 - 24_0003 Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2)
		PCN24_0003_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LT4356MPMS-1#PBF	PRODUCTION
LT4356MPMS-1#TRPBF	PRODUCTION
Oct 24, 2024 - 24_0246 Migrating Bottom Trace Code Marking to Top Side Laser Marking for SOIC_N Package
		PCN24_0246_Form Material_Report Marking Comparison Delta Qualification Matrix
LT4356MPS-1#PBF	PRODUCTION
LT4356MPS-1#TRPBF	PRODUCTION
LT4356MPS-2#PBF	PRODUCTION
LT4356MPS-2#TRPBF	PRODUCTION
Aug 6, 2022 - 22_0173 Laser Top Mark Conversion for SOICN14 and SOICN16 Packages Assembled on ADPG [PNG]
		PCN22_0173_Form Material_Report Delta Qualification Matrix
LT4356MPS-1#PBF	PRODUCTION
LT4356MPS-1#TRPBF	PRODUCTION
LT4356MPS-2#PBF	PRODUCTION
LT4356MPS-2#TRPBF	PRODUCTION
Jun 4, 2025 - 25_0037 Carsem SnPb Packaging End of Life
		PDN25_0037_Form Material_Report
LT4356MPMS-1	PRODUCTION	PDN25_0037_Form Material_Report
Aug 16, 2021 - 20_0040 Discontinuation of Lead Finished Parts for MSOP Package.
		PDN20_0040_Form Material_Report
LT4356MPMS-1	PRODUCTION	PDN20_0040_Form Material_Report

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Hardware Ecosystem

Parts	Product Life Cycle	Description
LT4356-1 LT4356-2	RECOMMENDED FOR NEW DESIGNS	Surge Stopper
LT4356-3 LT4356MP-3	RECOMMENDED FOR NEW DESIGNS	Surge Stopper with Fault Latchoff

Tools & Simulations

LTspice 1

LT4356-1 Demo Circuit - Surge Stopper (4A, 12V Overvoltage Output Regulator)

Models for the following parts are available in LTspice:

LT4356-1
LT4356-2
LT4356-3

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

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