LTC3119

RECOMMENDED FOR NEW DESIGNS

18V, 5A Synchronous Buck-Boost DC/DC Converter

Data Sheet Product Selection Table

Part Models: 12
1ku List Price: Starting From $9.76

Viewing:

Overview

Input Voltage Range: 2.5V to 18V
Runs Down to V_IN = 250mV After Start-Up
Output Voltage Range: 0.8V to 18V
5A Output Current in Buck Mode, V_IN > 6V
3A Output Current for V_IN = 3.6V, V_OUT = 5V
Programmable Switching Frequency: 400kHz to 2MHz
Synchronizable with an External Clock Up to 2MHz
Accurate Run Comparator Threshold
Burst Mode^® Operation, No-Load I_Q = 35μA
Ultralow Noise Buck-Boost PWM
Current Mode Control
Maximum Power Point Control
Power Good Indicator
Internal Soft-Start
28-Lead 4mm × 5mm QFN and TSSOP Packages

Part Models: 12
1ku List Price: Starting From $9.76

Documentation

Data Sheet 1

LTC3119: 18V, 5A Synchronous Buck-Boost DC/DC Converter Data Sheet 03/16/2017

User Guide 1

DC2129A - Demo Manual 02/24/2017

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
LTC3119EFE#PBF	28-Lead TSSOP w/ EP	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LTC3119EFE#TRPBF	28-Lead TSSOP w/ EP	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LTC3119EUFD#PBF	28-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LTC3119EUFD#TRPBF	28-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LTC3119HFE#PBF	28-Lead TSSOP w/ EP	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LTC3119HFE#TRPBF	28-Lead TSSOP w/ EP	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LTC3119IFE#PBF	28-Lead TSSOP w/ EP	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LTC3119IFE#TRPBF	28-Lead TSSOP w/ EP	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LTC3119IUFD#PBF	28-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LTC3119IUFD#TRPBF	28-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LTC3119MPFE#PBF	28-Lead TSSOP w/ EP	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LTC3119MPFE#TRPBF	28-Lead TSSOP w/ EP	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

May 18, 2026 - 26_0072 Epoxy Change for Select TSSOP Products
		PCN26_0072_Form Material_Report Delta Qualification Matrix Qualification Results Summary
LTC3119EFE#PBF	PRODUCTION
LTC3119EFE#TRPBF	PRODUCTION
LTC3119HFE#PBF	PRODUCTION
LTC3119HFE#TRPBF	PRODUCTION
LTC3119IFE#PBF	PRODUCTION
LTC3119IFE#TRPBF	PRODUCTION
LTC3119MPFE#PBF	PRODUCTION
LTC3119MPFE#TRPBF	PRODUCTION
Apr 6, 2022 - 22_0068 Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL
		PCN22_0068_Form Material_Report Delta Qualification Matrix
LTC3119EFE#PBF	PRODUCTION
LTC3119EFE#TRPBF	PRODUCTION
LTC3119HFE#PBF	PRODUCTION
LTC3119HFE#TRPBF	PRODUCTION
LTC3119IFE#PBF	PRODUCTION
LTC3119IFE#TRPBF	PRODUCTION
LTC3119MPFE#PBF	PRODUCTION
LTC3119MPFE#TRPBF	PRODUCTION
Apr 11, 2019 - 19_0067 Notification of Wafer Fab Location Change for 0.35 BCD Process
		PCN19_0067_Form Material_Report Delta Qualification Matrix Qualification Results Summary Detailed Parts List Other
LTC3119EFE#PBF	PRODUCTION
LTC3119EFE#TRPBF	PRODUCTION
LTC3119EUFD#PBF	PRODUCTION
LTC3119EUFD#TRPBF	PRODUCTION
LTC3119HFE#PBF	PRODUCTION
LTC3119HFE#TRPBF	PRODUCTION
LTC3119IFE#PBF	PRODUCTION
LTC3119IFE#TRPBF	PRODUCTION
LTC3119IUFD#PBF	PRODUCTION
LTC3119IUFD#TRPBF	PRODUCTION
LTC3119MPFE#PBF	PRODUCTION
LTC3119MPFE#TRPBF	PRODUCTION

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

Software Resources

Can't find the software or driver you need?

Request a Driver/Software

Hardware Ecosystem

Parts	Product Life Cycle	Description
Switching Regulators & Controllers 2
LTC3785	PRODUCTION	10V, High Efficiency, Synchronous, No R_SENSE Buck-Boost Controller
LTC3785-1	PRODUCTION	10V, High Efficiency, Buck-Boost Controller with Power Good

Parts	Product Life Cycle	Description
LTC3112	RECOMMENDED FOR NEW DESIGNS	15V, 2.5A Synchronous Buck-Boost DC/DC Converter
LTC3113	RECOMMENDED FOR NEW DESIGNS	3A Low Noise Buck-Boost DC/DC Converter

Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

LTC3119

LTpowerCAD 1

LTC3119 Example Design - 9Vin to 5Vout 5A max

Design tools for the following parts are available in LTpowerCAD:

LTC3119

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.

LTpowerCAD^® is a power supply design program which selects power stage components, provides detailed power efficiency, shows quick loop Bode plot stability and load transient analysis, and can export to LTspice for simulation.

Evaluation Kits

LTC3119 Demo Board | Synchronous Buck-Boost, 2.5V ≤ VIN ≤ 18V, VOUT = 5V @ up to 5A

Buy Now View Details

Product Details

Demonstration circuit 2129A features the LTC3119, an 18V, 5A synchronous buck/boost DC/DC converter. The DC2129A has been designed for an input voltage range of 2.5V to 18V with an output voltage (V_OUT) set to 5V. For V_IN > 5V the output current can be as high as 5A. The unique 4-switch, single inductor architecture provides low noise and seamless operation from input voltages above, below, or equal to the output voltage.

Resources

DC2129A - Schematic
2/24/2017

DC2129A - Design Files
2/24/2017

DC2129A - Demo Manual
2/24/2017

Latest Discussions

18 Weeks Ago

1 Years Ago