Power Management Power Control Overvoltage & Overcurrent Protection
Power Management Hot Swap Controllers High Voltage Hot Swap Controllers
Space & Harsh Environment Military Plastic (MP)

Also_Recommend

LT4363 - High Voltage Surge Stopper with Current Limit

LTC4366-1/LTC4366-2 - High Voltage Surge Stopper

LT4356MP-1/LT4356MP-2 - Surge Stopper

Features

  • 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

Typical Application

LT4356MP Typical Application
LT4356MP Typical Application

Description

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 VCC 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.

Packaging

For complete and up to date package information and drawings, please refer to our packaging page

MS-10, SO-16

LT4356MP Package Drawing
LT4356MP Package Drawing

Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LT4356CDE-1 DFN 12 C $2.83 $1.98 View
LT4356CDE-1#PBF DFN 12 C $2.83 $1.98 View
LT4356CDE-1#TRPBF DFN 12 C $2.08 View
LT4356CDE-2 DFN 12 C $2.83 $1.98 View
LT4356CDE-2#PBF DFN 12 C $2.83 $1.98 View
LT4356CDE-2#TRPBF DFN 12 C $2.08 View
LT4356CDE-3#PBF DFN 12 C $2.83 $1.98 View
LT4356CDE-3#TRPBF DFN 12 C $2.04 View
LT4356CMS-1 MSOP 10 C $2.83 $1.98 View
LT4356CMS-1#PBF MSOP 10 C $2.83 $1.98 View
LT4356CMS-1#TRPBF MSOP 10 C $2.04 View
LT4356CMS-3#PBF MSOP 10 C $2.83 $1.98 View
LT4356CMS-3#TRPBF MSOP 10 C $2.04 View
LT4356CS-1#PBF SO 16 C $2.83 $1.98 View
LT4356CS-1#TRPBF SO 16 C $2.04 View
LT4356CS-2#PBF SO 16 C $2.83 $1.98 View
LT4356CS-2#TRPBF SO 16 C $2.04 View
LT4356CS-3#PBF SO 16 C $2.83 $1.98 View
LT4356CS-3#TRPBF SO 16 C $2.04 View
LT4356HDE-1 DFN 12 H $3.70 $2.59 View
LT4356HDE-1#PBF DFN 12 H $3.70 $2.59 View
LT4356HDE-1#TRPBF DFN 12 H $2.69 View
LT4356HDE-2 DFN 12 H $3.70 $2.59 View
LT4356HDE-2#PBF DFN 12 H $3.70 $2.59 View
LT4356HDE-2#TRPBF DFN 12 H $2.69 View
LT4356HDE-3 DFN 12 H $3.70 $2.59 View
LT4356HDE-3#PBF DFN 12 H $3.70 $2.59 View
LT4356HDE-3#TRPBF DFN 12 H $2.65 View
LT4356HMS-1 MSOP 10 H $3.70 $2.59 View
LT4356HMS-1#PBF MSOP 10 H $3.70 $2.59 View
LT4356HMS-1#TRPBF MSOP 10 H $2.65 View
LT4356HMS-3 MSOP 10 H $3.70 $2.59 View
LT4356HMS-3#PBF MSOP 10 H $3.70 $2.59 View
LT4356HMS-3#TRPBF MSOP 10 H $2.65 View
LT4356HS-1#PBF SO 16 H $3.70 $2.59 View
LT4356HS-1#TRPBF SO 16 H $2.65 View
LT4356HS-2#PBF SO 16 H $3.70 $2.59 View
LT4356HS-2#TRPBF SO 16 H $2.65 View
LT4356HS-3#PBF SO 16 H $3.70 $2.59 View
LT4356HS-3#TRPBF SO 16 H $2.65 View
LT4356IDE-1 DFN 12 I $3.39 $2.38 View
LT4356IDE-1#PBF DFN 12 I $3.39 $2.38 View
LT4356IDE-1#TRPBF DFN 12 I $2.48 View
LT4356IDE-2 DFN 12 I $3.39 $2.38 View
LT4356IDE-2#PBF DFN 12 I $3.39 $2.38 View
LT4356IDE-2#TRPBF DFN 12 I $2.48 View
LT4356IDE-3#PBF DFN 12 I $3.40 $2.38 View
LT4356IDE-3#TRPBF DFN 12 I $2.44 View
LT4356IMS-1 MSOP 10 I $3.39 $2.38 View
LT4356IMS-1#PBF MSOP 10 I $3.39 $2.38 View
LT4356IMS-1#TRPBF MSOP 10 I $2.44 View
LT4356IMS-3#PBF MSOP 10 I $3.40 $2.38 View
LT4356IMS-3#TRPBF MSOP 10 I $2.43 View
LT4356IS-1#PBF SO 16 I $3.39 $2.38 View
LT4356IS-1#TRPBF SO 16 I $2.44 View
LT4356IS-2#PBF SO 16 I $3.40 $2.38 View
LT4356IS-2#TRPBF SO 16 I $2.44 View
LT4356IS-3#PBF SO 16 I $3.40 $2.38 View
LT4356IS-3#TRPBF SO 16 I $2.44 View
LT4356MPMS-1 MSOP 10 MP $8.49 $5.94 View
LT4356MPMS-1#PBF MSOP 10 MP $8.49 $5.94 View
LT4356MPMS-1#TR MSOP 10 MP $6.00 View
LT4356MPMS-1#TRPBF MSOP 10 MP $6.00 View
LT4356MPS-1 SO 16 MP $8.49 $5.94 View
LT4356MPS-1#PBF SO 16 MP $8.49 $5.94 View
LT4356MPS-1#TR SO 16 MP $6.00 View
LT4356MPS-1#TRPBF SO 16 MP $6.00 View
LT4356MPS-2 SO 16 MP $8.49 $5.94 View
LT4356MPS-2#PBF SO 16 MP $8.49 $5.94 View
LT4356MPS-2#TR SO 16 MP $6.00 View
LT4356MPS-2#TRPBF SO 16 MP $6.00 View
Buy Now • Request Samples
* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology demo boards are offered free of charge to qualified customers. Contact your local sales office or distributor to request a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Click here to view our complete list of demo boards

Applications

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

Simulate

LTspice IV is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. To download LTspice IV and other FREE simulation tools, please visit our Design Simulation page.

To launch a ready to run LTspice demonstration circuit for this part:

  • Step 1: If you have not installed LTspice on this computer, download and install LTspice IV
  • Step 2: Once LTspice is installed, click on the link(s) below to launch the simulation
  • Step 3: If LTspice IV does not automatically open after clicking the link above, you can instead run the simulation by right clicking on the link and selecting "Save Target As". After saving the file to your computer, start LTspice and open the demonstration circuit by selecting 'Open' from the 'File' menu

To explore other ready to run LTspice demonstration circuits, please visit our Demo Circuits Collection.

Related models available in LTspice IV
LT4356-1
LT4356-2
LT4356-3

Technical Support