LTC4359 - Ideal Diode Controller with Reverse Input Protection


  • Reduces Power Dissipation by Replacing a Power Schottky Diode
  • Wide Operating Voltage Range: 4V to 80V
  • Reverse Input Protection to – 40V
  • Low 9μA Shutdown Current
  • Low 150μA Operating Current
  • Smooth Switchover without Oscillation
  • Controls Single or Back-to-Back N-Channel MOSFETs
  • Available in 6-Lead (2mm × 3mm) DFN and 8-Lead MSOP Packages

Typical Application

LTC4359 Typical Application
LTC4359 Typical Application


The LTC®4359 is a positive high voltage, ideal diode controller that drives an external N-channel MOSFET to replace a Schottky diode. It controls the forward-voltage drop across the MOSFET to ensure smooth current delivery without oscillation even at light loads. If a power source fails or is shorted, a fast turn-off minimizes reverse current transients. A shutdown mode is available to reduce the quiescent current to 9μA for load switch and 14μA for ideal diode applications.

When used in high current diode applications, the LTC4359 reduces power consumption, heat dissipation, voltage loss and PC board area. With its wide operating voltage range, the ability to withstand reverse input voltage, and high temperature rating, the LTC4359 satisfies the demanding requirements of both automotive and telecom applications. The LTC4359 also easily ORs power sources in systems with redundant supplies.


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

Part Number Package Code Temp Package
LTC4359CDCB#PBF 2x3 DFN-6 DCB C 05-08-1715 RoHS
LTC4359CDCB#TRMPBF 2x3 DFN-6 DCB C 05-08-1715 RoHS
LTC4359CDCB#TRPBF 2x3 DFN-6 DCB C 05-08-1715 RoHS
LTC4359CMS8#PBF MS-8 MS8 C 05-08-1660 RoHS
LTC4359CMS8#TRPBF MS-8 MS8 C 05-08-1660 RoHS
LTC4359HDCB#PBF 2x3 DFN-6 DCB H 05-08-1715 RoHS
LTC4359HDCB#TRMPBF 2x3 DFN-6 DCB H 05-08-1715 RoHS
LTC4359HDCB#TRPBF 2x3 DFN-6 DCB H 05-08-1715 RoHS
LTC4359HMS8#PBF MS-8 MS8 H 05-08-1660 RoHS
LTC4359HMS8#TRPBF MS-8 MS8 H 05-08-1660 RoHS
LTC4359IDCB#PBF 2x3 DFN-6 DCB I 05-08-1715 RoHS
LTC4359IDCB#TRMPBF 2x3 DFN-6 DCB I 05-08-1715 RoHS
LTC4359IDCB#TRPBF 2x3 DFN-6 DCB I 05-08-1715 RoHS
LTC4359IMS8#PBF MS-8 MS8 I 05-08-1660 RoHS
LTC4359IMS8#TRPBF MS-8 MS8 I 05-08-1660 RoHS

LTC4359 Package Drawing
LTC4359 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
LTC4359CDCB#PBF 2x3 DFN-6 C $3.00 Yes
LTC4359CDCB#TRMPBF 2x3 DFN-6 C $3.00 $2.15 Yes
LTC4359CDCB#TRPBF 2x3 DFN-6 C $3.00 $2.10 Yes
LTC4359CMS8#PBF MS-8 C $3.00 $2.10 Yes
LTC4359CMS8#TRPBF MS-8 C $2.16 Yes
LTC4359HDCB#PBF 2x3 DFN-6 H $3.97 Yes
LTC4359HDCB#TRMPBF 2x3 DFN-6 H $3.97 $2.83 Yes
LTC4359HDCB#TRPBF 2x3 DFN-6 H $3.97 $2.78 Yes
LTC4359HMS8#PBF MS-8 H $3.97 $2.78 Yes
LTC4359HMS8#TRPBF MS-8 H $2.84 Yes
LTC4359IDCB#PBF 2x3 DFN-6 I $3.45 Yes
LTC4359IDCB#TRMPBF 2x3 DFN-6 I $3.45 $2.47 Yes
LTC4359IDCB#TRPBF 2x3 DFN-6 I $3.45 $2.42 Yes
LTC4359IMS8#PBF MS-8 I $3.45 $2.42 Yes
LTC4359IMS8#TRPBF MS-8 I $2.48 Yes
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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
DC1502A LTC4359DCB Demoboard: 12V, 20A Ideal Diode with Reverse Input Protection $75.00
DC1676A LTC4359DCB Demoboard: 28V, 20A Ideal Diode and Switch with Reverse Input Protection $75.00
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Click here to view our complete list of demo boards


  • Automotive Battery Protection
  • Redundant Power Supplies
  • Supply Holdup
  • Telecom Infrastructure
  • Computer Systems/Servers
  • Solar Systems

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