LTC3879

PRODUCTION

Fast, Wide Operating Range No R_SENSE Step-Down Controller

Data Sheet Product Selection Table

Part Models: 8
1ku List Price: Starting From $2.14

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Part Details

Wide V_IN Range: 4V to 38V
±1% 0.6V Voltage Reference
Extremely Fast Transient Response
t_ON(MIN): 43ns
No R_SENSE^™ Valley Current Mode Control
Stable with Low ESR Ceramic C_OUT
Supports Smooth Start-Up in Pre-Biased Output
Optimized for High Step-Down Ratios
Adjustable Output Voltage Soft-Start or Tracking
Power Good Output Voltage Monitor
Dual N-Channel MOSFET Synchronous Drive
Adjustable Switching Frequency
Programmable Current Limit with Foldback
Output Overvoltage Protection
16-Pin MSOP and 3mm × 3mm QFN Packages

Part Models: 8
1ku List Price: Starting From $2.14

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
LTC3879EMSE#PBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3879EMSE#TRPBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3879EUD#PBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3879EUD#TRPBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3879IMSE#PBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3879IMSE#TRPBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3879IUD#PBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3879IUD#TRPBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Feb 14, 2025 - 25_0017 Bond Wire Change from Gold to Copper
		PCN25_0017_Form Material_Report Qualification Results Summary
LTC3879EMSE#PBF	PRODUCTION
LTC3879EMSE#TRPBF	PRODUCTION
LTC3879EUD#PBF	PRODUCTION
LTC3879EUD#TRPBF	PRODUCTION
Jun 5, 2024 - 24_0003 Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2)
		PCN24_0003_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LTC3879EMSE#PBF	PRODUCTION
LTC3879EMSE#TRPBF	PRODUCTION
LTC3879IMSE#PBF	PRODUCTION
LTC3879IMSE#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
LTC3879EMSE#PBF	PRODUCTION
LTC3879EMSE#TRPBF	PRODUCTION
LTC3879IMSE#PBF	PRODUCTION
LTC3879IMSE#TRPBF	PRODUCTION
Apr 14, 2025 - 25_0017 Bond Wire Change from Gold to Copper
		PCN25_0017_Form Material_Report Qualification Results Summary
LTC3879IUD#PBF	PRODUCTION
LTC3879IUD#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
Digital Power System Managers 1
LTC2974	RECOMMENDED FOR NEW DESIGNS	4-Channel PMBus Power System Manager Featuring Accurate Output Current Measurement
Dual-Supply Monitors 1
LTC2960	RECOMMENDED FOR NEW DESIGNS	36V Nano-Current Two-Input Voltage Monitor
Multiple Output Buck Regulators 1
LTC3880	RECOMMENDED FOR NEW DESIGNS	Dual Output PolyPhase Step-Down DC/DC Controller with Digital Power System Management
Surge Stopper, Overvoltage, and Overcurrent Protection 1
LT4363	RECOMMENDED FOR NEW DESIGNS	High Voltage Surge Stopper with Current Limit

Tools & Simulations

LTspice 1

LTC3879 Demo Circuit - No Rsense Step-Down Controller (4.5-14V to 1.2V@15A)

Models for the following parts are available in LTspice:

LTC3879

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.

Evaluation Kits

LTC3879EMSE Demo Board | 4.5V ≤ VIN ≤ 34, VOUT = 1.2V @ 12A

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Product Details

Demonstration circuit 1345 is a wide input voltage range, no Rsense step-down dc/dc converter featuring the LTC3879EMSE. Its output voltage is 1.2V with a load rating of 12A and the input voltage range is 4.5V to 34V.

Resources

DC1345A - Schematic
10/7/2009

DC1345A - Design Files
10/7/2009

DC1345A - Demo Manual
10/7/2009

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LTC3879

Part Details

Documentation

Data Sheet 1

Reliability Data 1

User Guide 2

Technical Articles 1

Product Selector Card 1