LTC3119

RECOMMENDED FOR NEW DESIGNS

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

Part Models: 12
1ku List Price: Starting From $8.49

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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

The LTC3119 is a high efficiency 18V monolithic buck-boost converter that can deliver up to 5A of continuous output current. Extensive feature integration and very low resistance internal power switches minimize the total solution footprint for even the most demanding applications. A proprietary 4-switch PWM architecture provides seamless low noise operation from input voltages above, equal to, or below the output voltage.

External frequency programming as well as synchronization using an internal PLL enable operation over a wide switching frequency range of 400kHz to 2MHz. The wide 2.5V to 18V input range is well suited for operation from unregulated power sources including battery stacks and backup capacitors. After start-up, operation is possible with input voltages as low as 250mV.

Other features include: output short-circuit protection, thermal overload protection, less than 3μA shutdown current, power good indicator, Burst Mode operation, and maximum power point control.

The LTC3119 is offered in thermally enhanced 28-lead 4mm × 5mm QFN and TSSOP packages.

Applications

Wide Input Range Power Supplies
1- to 4-Cell Lithium Battery Powered Products
RF Power Supplies
Solar Battery Chargers
System Backup Power Supplies
Lead Acid to 12V Regulator

Part Models: 12
1ku List Price: Starting From $8.49

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

Part Models	Product Lifecycle	PCN

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

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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

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

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

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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.