LTC4353

RECOMMENDED FOR NEW DESIGNS

Dual Low Voltage Ideal Diode Controller

Part Models: 8
1ku List Price: Starting From $4.13

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Overview

Low Loss Replacement for Power Diodes
Controls N-Channel MOSFETs
0V to 18V Supply ORing or Holdup
1μs Gate Turn-On and Turn-Off Time
Enable Inputs
MOSFET On-Status Outputs
16-Lead MSOP and DFN (4mm × 3mm) Packages

The LTC4353 controls external N-channel MOSFETs to implement an ideal diode function. It replaces two high power Schottky diodes and their associated heat sinks, saving power and board area. The ideal diode function permits low loss power supply ORing and supply holdup applications.

The LTC4353 regulates the forward-voltage drop across the MOSFET to ensure smooth current transfer in diode-OR applications. A fast turn-on reduces the load voltage droop during supply switchover. If the input supply fails or is shorted, a fast turn-off minimizes reverse-current transients.

The controller operates with supplies from 2.9V to 18V. If both supplies are below 2.9V, an external supply is needed at the V_CC pin. Enable inputs can be used to turn off the MOSFET and put the controller in a low current state. Status outputs indicate whether the MOSFETs are on or off.

Applications

Redundant Power Supplies
Supply Holdup
High Availability Systems and Servers
Telecom and Network Infrastructure

Part Models: 8
1ku List Price: Starting From $4.13

Documentation

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
LTC4353CDE#PBF	16-Lead DFN (4mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4353CDE#TRPBF	16-Lead DFN (4mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4353CMS#PBF	16-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4353CMS#TRPBF	16-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4353IDE#PBF	16-Lead DFN (4mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4353IDE#TRPBF	16-Lead DFN (4mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4353IMS#PBF	16-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4353IMS#TRPBF	16-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Oct 11, 2022 - 22_0244 Epoxy Change from Henkel 8290 to 8290A for MSOP Package
		PCN22_0244_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LTC4353CMS#PBF	PRODUCTION
LTC4353CMS#TRPBF	PRODUCTION
LTC4353IMS#PBF	PRODUCTION
LTC4353IMS#TRPBF	PRODUCTION
Feb 4, 2020 - 20_0132 Laser Top Mark for 16-Lead MSOP Packages Assembled in ADPG and UTAC
		PCN20_0132_Form Material_Report
LTC4353CMS#PBF	PRODUCTION
LTC4353CMS#TRPBF	PRODUCTION
LTC4353IMS#PBF	PRODUCTION
LTC4353IMS#TRPBF	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Hardware Ecosystem

Parts	Product Life Cycle	Description
Protection Switches & Controllers 2
LTC4236	RECOMMENDED FOR NEW DESIGNS	Dual Ideal Diode-OR and Single Hot Swap Controller with Current Monitor
LTC4355	RECOMMENDED FOR NEW DESIGNS	Positive High Voltage Ideal Diode-OR with Input Supply and Fuse Monitors

Parts	Product Life Cycle	Description
LTC4352	RECOMMENDED FOR NEW DESIGNS	Low Voltage Ideal Diode Controller with Monitoring
LTC4370	RECOMMENDED FOR NEW DESIGNS	Two-Supply Diode-OR Current Balancing Controller

Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

LTC4353

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.