LTC3119
Info : RECOMMENDED FOR NEW DESIGNS
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LTC3119

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

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 12
1ku List Price Starting From $8.49
Features
  • 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
Additional Details
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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

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
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Product Lifecycle

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Apr 6, 2022

- 22_0068

Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL

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Apr 11, 2019

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Part Models

Product Lifecycle

PCN

Apr 6, 2022

- 22_0068

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Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL

LTC3119EFE#PBF

PRODUCTION

LTC3119EFE#TRPBF

PRODUCTION

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LTC3119HFE#TRPBF

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Apr 11, 2019

- 19_0067

arrow down

Notification of Wafer Fab Location Change for 0.35 BCD Process

LTC3119EFE#PBF

PRODUCTION

LTC3119EFE#TRPBF

PRODUCTION

LTC3119EUFD#PBF

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LTC3119EUFD#TRPBF

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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

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DC2129A

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

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DC2129A

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

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

Product Detail

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 (VOUT) set to 5V. For VIN > 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.

Tools & Simulations

Tools & Simulations 1

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.

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