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


  • Rugged Floating Topology
  • Wide Operating Voltage Range: 9V to >500V
  • Adjustable Output Clamp Voltage
  • Controls N-Channel MOSFET
  • Adjustable Protection Timer
  • Internal 9 Second Cool-Down Timer
  • Shutdown IQ < 14μA
  • Available in 8-Lead TSOT and 8-Lead 3mm × 2mm DFN Packages

Typical Application

LTC4366 Typical Application
LTC4366 Typical Application


The LTC®4366 surge stopper protects loads from high voltage transients. By controlling the gate of an external N-channel MOSFET, the LTC4366 regulates the output during an overvoltage transient. The load may remain operational while the overvoltage is dropped across the MOSFET. Placing a resistor in the return line isolates the LTC4366 and allows it to float up with the supply; therefore, the upper limit on the output voltage depends only on the availability of high valued resistors and MOSFET ratings.

An adjustable overvoltage timer prevents MOSFET damage during the surge while an additional 9 second timer provides for MOSFET cool down. A shutdown pin reduces the quiescent current to less than 14μA during shutdown. After a fault the LTC4366-1 latches off while the LTC4366-2 will auto-retry.


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

SOT-23, DFN-8

LTC4366 Package Drawing
LTC4366 Package Drawing

Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LTC4366CDDB-1#PBF DFN 8 C $3.79 View
LTC4366CDDB-1#TRMPBF DFN 8 C $3.79 $2.70 View
LTC4366CDDB-1#TRPBF DFN 8 C $3.79 $2.65 View
LTC4366CDDB-2#PBF DFN 8 C $3.79 View
LTC4366CDDB-2#TRMPBF DFN 8 C $3.79 $2.70 View
LTC4366CDDB-2#TRPBF DFN 8 C $3.79 $2.65 View
LTC4366CTS8-1#PBF SOT 8 C $3.79 View
LTC4366CTS8-1#TRMPBF SOT 8 C $3.79 $2.70 View
LTC4366CTS8-1#TRPBF SOT 8 C $3.79 $2.65 View
LTC4366CTS8-2#PBF SOT 8 C $3.79 View
LTC4366CTS8-2#TRMPBF SOT 8 C $3.79 $2.70 View
LTC4366CTS8-2#TRPBF SOT 8 C $3.79 $2.65 View
LTC4366HDDB-1#PBF DFN 8 H $5.00 View
LTC4366HDDB-1#TRMPBF DFN 8 H $5.00 $3.55 View
LTC4366HDDB-1#TRPBF DFN 8 H $5.00 $3.50 View
LTC4366HDDB-2#PBF DFN 8 H $5.00 View
LTC4366HDDB-2#TRMPBF DFN 8 H $5.00 $3.55 View
LTC4366HDDB-2#TRPBF DFN 8 H $5.00 $3.50 View
LTC4366HTS8-1#PBF SOT 8 H $5.00 View
LTC4366HTS8-1#TRMPBF SOT 8 H $5.00 $3.55 View
LTC4366HTS8-1#TRPBF SOT 8 H $5.00 $3.50 View
LTC4366HTS8-2#PBF SOT 8 H $5.00 View
LTC4366HTS8-2#TRMPBF SOT 8 H $5.00 $3.55 View
LTC4366HTS8-2#TRPBF SOT 8 H $5.00 $3.50 View
LTC4366IDDB-1#PBF DFN 8 I $4.36 View
LTC4366IDDB-1#TRMPBF DFN 8 I $4.36 $3.10 View
LTC4366IDDB-1#TRPBF DFN 8 I $4.36 $3.05 View
LTC4366IDDB-2#PBF DFN 8 I $4.36 View
LTC4366IDDB-2#TRMPBF DFN 8 I $4.36 $3.10 View
LTC4366IDDB-2#TRPBF DFN 8 I $4.36 $3.05 View
LTC4366ITS8-1#PBF SOT 8 I $4.36 View
LTC4366ITS8-1#TRMPBF SOT 8 I $4.36 $3.10 View
LTC4366ITS8-1#TRPBF SOT 8 I $4.36 $3.05 View
LTC4366ITS8-2#PBF SOT 8 I $4.36 View
LTC4366ITS8-2#TRMPBF SOT 8 I $4.36 $3.10 View
LTC4366ITS8-2#TRPBF SOT 8 I $4.36 $3.05 View
LTC4366MPDDB-1#PBF DFN 8 MP $11.36 View
LTC4366MPDDB-1#TRMPBF DFN 8 MP $11.36 $8.00 View
LTC4366MPDDB-1#TRPBF DFN 8 MP $11.36 $7.95 View
LTC4366MPDDB-2#PBF DFN 8 MP $11.36 View
LTC4366MPDDB-2#TRMPBF DFN 8 MP $11.36 $8.00 View
LTC4366MPDDB-2#TRPBF DFN 8 MP $11.36 $7.95 View
LTC4366MPTS8-1#PBF 6 MP $11.36 View
LTC4366MPTS8-1#TRMPBF SOT 8 MP $11.36 $8.00 View
LTC4366MPTS8-1#TRPBF 8 MP $11.36 $7.95 View
LTC4366MPTS8-2#PBF 8 MP $11.36 View
LTC4366MPTS8-2#TRM SOT 8 MP $11.36 $8.00 View
LTC4366MPTS8-2#TRMPBF SOT 8 MP $11.36 $8.00 View
LTC4366MPTS8-2#TRPBF SOT 8 MP $11.36 $7.95 View
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* 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 offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about 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.

Part Number Description Price Documentation
DC1850A-A LTC4366-1 Demoboard | Very High Voltage Surge Stopper with Latchoff $75.00
DC1850A-B LTC4366-2 Demoboard | Very High Voltage Surge Stopper with Auto-Retry $75.00
DC2150A-C 28V, 5A MIL-STD-1275D Surge Stopper [Featuring LTC4366HTS8-2 and LT4363HS-2] $150.00
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Click here to view our complete list of demo boards


  • Industrial, Automotive and Avionic Surge Protection
  • High Voltage DC Distribution
  • 28V Vehicle Systems

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