LTC4364 - Surge Stopper with Ideal Diode


  • Wide Operating Voltage Range: 4V to 80V
  • Withstands Surges Over 80V with VCC Clamp
  • Adjustable Output Clamp Voltage
  • Ideal Diode Controller Holds Up Output Voltage During Input Brownouts
  • Reverse Input Protection to -40V
  • Reverse Output Protection to -20V
  • Overcurrent Protection
  • Low 10μA Shutdown Current at 12V
  • Adjustable Fault Timer
  • 0.1% Retry Duty Cycle During Faults (LTC4364-2)
  • Available in 4mm x 3mm 14-Lead DFN, 16-Lead MSOP, and 16-Lead SO Packages

Typical Application

LTC4364-1 Typical Application
LTC4364-1 Typical Application
LTC4364-1 Typical Application


The LTC4364 surge stopper with ideal diode controller protects loads from high voltage transients. It limits and regulates the output during an overvoltage event, such as load dump in automobiles, by controlling the voltage drop across an external N-channel MOSFET pass device. The LTC4364 also includes a timed, current limited circuit breaker. In a fault condition, an adjustable fault timer must expire before the pass device is turned off. The LTC4364-1 latches off the pass device while the LTC4364-2 automatically restarts after a delay. The LTC4364 precisely monitors the input supply for overvoltage (OV) and undervoltage (UV) conditions. The external MOSFET is held off in undervoltage and auto-retry is disabled in overvoltage.

An integrated ideal diode controller drives a second MOSFET to replace a Schottky diode for reverse input protection and output voltage holdup. The LTC4364 controls the forward voltage drop across the MOSFET and minimizes reverse current transients upon power source failure, brownout or input short.


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

DFN-14, MS-16, SO-16

LTC4364-1 Package Drawing
LTC4364-1 Package Drawing
LTC4364-1 Package Drawing

Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LTC4364CDE-1#PBF DFN 14 C $4.93 $3.45 View
LTC4364CDE-1#TRPBF DFN 14 C $3.51 View
LTC4364CDE-2#PBF DFN 14 C $4.93 $3.45 View
LTC4364CDE-2#TRPBF DFN 14 C $3.51 View
LTC4364CMS-1#PBF MSOP 16 C $4.93 $3.45 View
LTC4364CMS-1#TRPBF MSOP 16 C $3.51 View
LTC4364CMS-2#PBF MSOP 16 C $4.93 $3.45 View
LTC4364CMS-2#TRPBF MSOP 16 C $3.51 View
LTC4364CS-1#PBF SO 16 C $4.93 $3.45 View
LTC4364CS-1#TRPBF SO 16 C $3.51 View
LTC4364CS-2#PBF SO 16 C $4.93 $3.45 View
LTC4364CS-2#TRPBF SO 16 C $3.51 View
LTC4364HDE-1#PBF DFN 14 H $6.53 $4.57 View
LTC4364HDE-1#TRPBF DFN 14 H $4.63 View
LTC4364HDE-2#PBF DFN 14 H $6.53 $4.57 View
LTC4364HDE-2#TRPBF DFN 14 H $4.63 View
LTC4364HMS-1#PBF MSOP 16 H $6.53 $4.57 View
LTC4364HMS-1#TRPBF MSOP 16 H $4.63 View
LTC4364HMS-2#PBF MSOP 16 H $6.53 $4.57 View
LTC4364HMS-2#TRPBF MSOP 16 H $4.63 View
LTC4364HS-1#PBF SO 16 H $6.53 $4.57 View
LTC4364HS-1#TRPBF SO 16 H $4.63 View
LTC4364HS-2#PBF SO 16 H $6.53 $4.57 View
LTC4364HS-2#TRPBF SO 16 H $4.63 View
LTC4364IDE-1#PBF DFN 14 I $5.67 $3.97 View
LTC4364IDE-1#TRPBF DFN 14 I $4.03 View
LTC4364IDE-2#PBF DFN 14 I $5.67 $3.97 View
LTC4364IDE-2#TRPBF DFN 14 I $4.03 View
LTC4364IMS-1#PBF MSOP 16 I $5.67 $3.97 View
LTC4364IMS-1#TRPBF MSOP 16 I $4.03 View
LTC4364IMS-2#PBF MSOP 16 I $5.67 $3.97 View
LTC4364IMS-2#TRPBF MSOP 16 I $4.03 View
LTC4364IS-1#PBF SO 16 I $5.67 $3.97 View
LTC4364IS-1#TRPBF SO 16 I $4.03 View
LTC4364IS-2#PBF SO 14 I $5.67 $3.97 View
LTC4364IS-2#TRPBF SO 16 I $4.03 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
DC2027A-A LTC4364DE-1 Demoboard: 12V Surge Stopper with Ideal Diode, Latch Off $75.00
DC2027A-B LTC4364DE-2 Demoboard: 12V Surge Stopper with Ideal Diode, Auto Retry $75.00
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  • Automotive/Avionic Surge Protection
  • Hot Swap/Live Insertion
  • Redundant Supply ORing
  • Output Port Protection

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