LTC4370

RECOMMENDED FOR NEW DESIGNS

Two-Supply Diode-OR Current Balancing Controller

Part Models: 8
1ku List Price: Starting From $5.90

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Overview

Shares Load Between Two Supplies
Eliminates Need for Active Control of Input Supplies
No Share Bus Required
Blocks Reverse Current
No Shoot-Through Current During Start-Up or Faults
0V to 18V High Side Operation
Enable Inputs
MOSFET On Status Outputs
Dual Ideal Diode Mode
16-Lead DFN (4mm × 3mm) and MSOP Packages

The LTC4370 is a two-supply current sharing controller which incorporates MOSFET ideal diodes. The diodes block reverse and shoot-through currents during start-up and fault conditions. Their forward voltage is adjusted to share the load currents between supplies. Unlike other sharing methods, neither a share bus nor trim pins on the supply are required.

The maximum MOSFET voltage drop can be set with a resistor. A fast gate 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. For lower rail voltages, 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. The load sharing function can be disabled to turn the LTC4370 into a dual ideal diode controller.

Applications

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

Part Models: 8
1ku List Price: Starting From $5.90

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
LTC4370CDE#PBF	16-Lead DFN (4mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4370CDE#TRPBF	16-Lead DFN (4mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4370CMS#PBF	16-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4370CMS#TRPBF	16-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4370IDE#PBF	16-Lead DFN (4mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4370IDE#TRPBF	16-Lead DFN (4mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4370IMS#PBF	16-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4370IMS#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
LTC4370CMS#PBF	PRODUCTION
LTC4370CMS#TRPBF	PRODUCTION
LTC4370IMS#PBF	PRODUCTION
LTC4370IMS#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
LTC4370CMS#PBF	PRODUCTION
LTC4370CMS#TRPBF	PRODUCTION
LTC4370IMS#PBF	PRODUCTION
LTC4370IMS#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
LTC4218	RECOMMENDED FOR NEW DESIGNS	Hot Swap Controller

Parts	Product Life Cycle	Description
LTC4352	RECOMMENDED FOR NEW DESIGNS	Low Voltage Ideal Diode Controller with Monitoring
LTC4353	RECOMMENDED FOR NEW DESIGNS	Dual Low Voltage Ideal Diode Controller

Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

LTC4370

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.