LTC4371

RECOMMENDED FOR NEW DESIGNS

LTC4371

Dual Negative Voltage Ideal Diode-OR Controller and Monitor

RECOMMENDED FOR NEW DESIGNS

–48V/50A Diode-OR Power Dissipation vs. Load Current slide

–48V/50A Diode-OR Power Dissipation vs. Load Current

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Part Models 8

1ku List Price Starting From $2.74

Features

Controls N-Channel MOSFETs to Replace Power Schottky Diodes
Low 15mV Forward Voltage Minimizes Dissipation
Withstands > ±300V Transients
Fast Turn-Off: <220ns
Shunt Regulated for High Voltage Applications
4.5V Minimum Operation
Low 350μA Quiescent Current
5mA Gate Pull-Up for 60Hz Applications
High Impedance Drain Pins: <10μA Leakage
Open Fuse and MOSFET Monitor
10-Pin (3mm × 3mm) DFN and MSOP Packages

Additional Details

The LTC4371 is a two-input negative voltage ideal diode-OR controller that drives external N-channel MOSFETs as a low dissipation alternative to Schottky diodes in high power –48V systems. Low power dissipation and voltage loss eliminates the need for heatsinks and reduces PC board area. Power sources can be easily ORed together to increase total system power and reliability.

The LTC4371 tolerates ±300V transients such as those experienced during lightning-induced surges and input supply short-circuit events. The internal shunt regulator and low 350μA quiescent current allow the use of a large value dropping resistor to protect the supply pin against high voltage transients, while the high impedance drain pins can be similarly protected by high value series resistors without compromising diode operation.

The 220ns reverse current turn-off is achieved by a powerful 2A gate driver with low propagation delay, thereby minimizing peak reverse current under catastrophic fault conditions. Open MOSFET and fuse faults are indicated at the FAULTB pin, which is capable of sinking 5mA to drive an LED or opto isolator.

Applications

–48V Telecom Power
AdvancedTCA Systems
Network Routers and Switches
Computer Systems and Servers

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Ask a Question

Submit your question below and we will return the best answer from ADI’s knowledge database:

Other places you can find help

Support

Analog Devices Support Portal is a one-stop shop to answer all your ADI questions.

Visit the ADI Support Page

Ask the ADI community for help.

Ask the EngineerZone Community

FAQs

Sales & Ordering FAQs

Part Models 8

1ku List Price Starting From $2.74

Technical Documents 4

LTC4371: Dual Negative Voltage Ideal Diode-OR Controller and Monitor Data Sheet 02/17/2016

R547 Reliability Data 03/26/2018

DC2180A - Demo Manual 07/20/2016

Negative Voltage Ideal Diodes (Diode-OR Controllers) 05/23/2016

Reference Materials 1

Ideal Diodes and Prioritizers 06/08/2018

Design Resources 8

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
LTC4371CDD#PBF	10-Lead DFN (3mm x 3mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC4371CDD#TRPBF	10-Lead DFN (3mm x 3mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC4371CMS#PBF	10-Lead MSOP	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC4371CMS#TRPBF	10-Lead MSOP	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC4371IDD#PBF	10-Lead DFN (3mm x 3mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC4371IDD#TRPBF	10-Lead DFN (3mm x 3mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC4371IMS#PBF	10-Lead MSOP	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC4371IMS#TRPBF	10-Lead MSOP	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys

LTC4371CDD#PBF
Pin/Package Drawing
10-Lead DFN (3mm x 3mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LTC4371CDD#TRPBF
Pin/Package Drawing
10-Lead DFN (3mm x 3mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LTC4371CMS#PBF
Pin/Package Drawing
10-Lead MSOP
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LTC4371CMS#TRPBF
Pin/Package Drawing
10-Lead MSOP
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LTC4371IDD#PBF
Pin/Package Drawing
10-Lead DFN (3mm x 3mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LTC4371IDD#TRPBF
Pin/Package Drawing
10-Lead DFN (3mm x 3mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LTC4371IMS#PBF
Pin/Package Drawing
10-Lead MSOP
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LTC4371IMS#TRPBF
Pin/Package Drawing
10-Lead MSOP
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

PCN/PDN Information

Filter by Model

Part Models

Product Lifecycle

PCN

Oct 11, 2022

- 22_0244

Epoxy Change from Henkel 8290 to 8290A for MSOP Package

LTC4371CMS#PBF

PRODUCTION

LTC4371CMS#TRPBF

PRODUCTION

LTC4371IMS#PBF

PRODUCTION

LTC4371IMS#TRPBF

PRODUCTION

pdf

PCN22_0244_Form

xls

Material_Report

pdf

Qualification Results Summary

xlsm

Delta Qualification Matrix

Feb 4, 2020

- 20_0130

Laser Top Mark Conversion for 10-Lead MSOP Packages Assembled in ADPG and UTAC

LTC4371CMS#PBF

PRODUCTION

LTC4371CMS#TRPBF

PRODUCTION

LTC4371IMS#PBF

PRODUCTION

LTC4371IMS#TRPBF

PRODUCTION

pdf

PCN20_0130_Form

xls

Material_Report

Filter by Model

Part Models

Product Lifecycle

PCN

Oct 11, 2022

- 22_0244

Epoxy Change from Henkel 8290 to 8290A for MSOP Package

LTC4371CMS#PBF

PRODUCTION

LTC4371CMS#TRPBF

PRODUCTION

LTC4371IMS#PBF

PRODUCTION

LTC4371IMS#TRPBF

PRODUCTION

pdf

PCN22_0244_Form

xls

Material_Report

pdf

Qualification Results Summary

xlsm

Delta Qualification Matrix

Feb 4, 2020

- 20_0130

Laser Top Mark Conversion for 10-Lead MSOP Packages Assembled in ADPG and UTAC

LTC4371CMS#PBF

PRODUCTION

LTC4371CMS#TRPBF

PRODUCTION

LTC4371IMS#PBF

PRODUCTION

LTC4371IMS#TRPBF

PRODUCTION

pdf

PCN20_0130_Form

xls

Material_Report

Companion Parts 2

Parts	Product Life Cycle	Description
High Voltage Hot Swap Controllers2
LTC4261	PRODUCTION	Negative Voltage Hot Swap Controllers with ADC and I²C Monitoring
LTC4252 LTC4252A		Negative Voltage Hot Swap Controllers

Alternative Parts 2

Parts	Product Life Cycle	Description
LTC4355	RECOMMENDED FOR NEW DESIGNS	Positive High Voltage Ideal Diode-OR with Input Supply and Fuse Monitors
LTC4357	RECOMMENDED FOR NEW DESIGNS	Positive High Voltage Ideal Diode Controller

DC2180A

LTC4371 Demo Board | Dual -48V, 50A Ideal Diode-OR

DC2180A

LTC4371 Demo Board | Dual -48V, 50A Ideal Diode-OR

Buy Now View Details

Product Detail

Demonstration circuit 2180A showcases the LTC4371 dual negative voltage ideal diode-OR controller and monitor, in a −48V, 50A application. Each channel includes two paralleled 2mΩ (Max) MOSFETs for a total dissipation of just 2.5W at full load. Power connections are made by way of 1⁄4" ring terminals with a cable capacity of 4 AWG.

Resources

PDF

DC2180A - Schematic

30.00K

PDF

DC2180A - Demo Manual

153.00K

ZIP

DC2180A - Design Files

1.00M

DC2180A

LTC4371 Demo Board | Dual -48V, 50A Ideal Diode-OR

LTspice 1

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To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, 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.