LTC3119
RECOMMENDED FOR NEW DESIGNS18V, 5A Synchronous Buck-Boost DC/DC Converter
- Part Models
- 12
- 1ku List Price
- Starting From $10.74
Overview
- Input Voltage Range: 2.5V to 18V
- Runs Down to VIN = 250mV After Start-Up
- Output Voltage Range: 0.8V to 18V
- 5A Output Current in Buck Mode, VIN > 6V
- 3A Output Current for VIN = 3.6V, VOUT = 5V
- Programmable Switching Frequency: 400kHz to 2MHz
- Synchronizable with an External Clock Up to 2MHz
- Accurate Run Comparator Threshold
- Burst Mode® Operation, No-Load IQ = 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
Documentation
Data Sheet 1
User Guide 1
Brochure 1
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 | ||
| LTC3119EFE#TRPBF | 28-Lead TSSOP w/ EP | ||
| LTC3119EUFD#PBF | 28-Lead QFN (4mm x 5mm x 0.75mm w/ EP) | ||
| LTC3119EUFD#TRPBF | 28-Lead QFN (4mm x 5mm x 0.75mm w/ EP) | ||
| LTC3119HFE#PBF | 28-Lead TSSOP w/ EP | ||
| LTC3119HFE#TRPBF | 28-Lead TSSOP w/ EP | ||
| LTC3119IFE#PBF | 28-Lead TSSOP w/ EP | ||
| LTC3119IFE#TRPBF | 28-Lead TSSOP w/ EP | ||
| LTC3119IUFD#PBF | 28-Lead QFN (4mm x 5mm x 0.75mm w/ EP) | ||
| LTC3119IUFD#TRPBF | 28-Lead QFN (4mm x 5mm x 0.75mm w/ EP) | ||
| LTC3119MPFE#PBF | 28-Lead TSSOP w/ EP | ||
| LTC3119MPFE#TRPBF | 28-Lead TSSOP w/ EP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
May 18, 2026 - 26_0072 Epoxy Change for Select TSSOP Products |
||
| 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 |
||
| 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 |
||
| 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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Request a Driver/SoftwareHardware Ecosystem
Tools & Simulations
LTspice
Models for the following parts are available in LTspice:
- LTC3119
LTpowerCAD 1
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