LTC3779
Info : RECOMMENDED FOR NEW DESIGNS
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LTC3779

150V VIN and VOUT Synchronous 4-Switch Buck-Boost Controller

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 6
1ku List Price Starting From $7.07
Features
  • 4-Switch Current Mode Single Inductor Architecture Allows VIN Above, Below or Equal to VOUT
  • Wide VIN Range: 4.5V to 150V
  • Wide Output Voltage Range: 1.2V ≤ VOUT ≤ 150V
  • Synchronous Rectification: Up to 99% Efficiency
  • ±1% 1.2V Voltage Reference
  • Input or Output Average Current Limit
  • On-Board LDO or External NMOS LDO for DRVCC
  • 36V EXTVCC LDO Powers Drivers
  • Programmable 6V to 10V DRVCC Optimizes Efficiency
  • No Top FET Refresh Noise in Boost or Buck Mode
  • VOUT Disconnected from VIN During Shutdown
  • Phase-Lockable Fixed Frequency (50kHz to 600kHz)
  • No Reverse Current During Start-Up
  • Power Good Output Voltage Monitor
  • 150V Rated RUN Pin with Accurate Turn-On Threshold
  • Programmable Input Overvoltage Lockout
  • Thermally Enhanced FE38 TSSOP Package Modified for High Voltage Operation
Additional Details
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The LTC3779 is a high performance buck-boost switching regulator controller that operates from input voltages above, below or equal to the output voltage. The constant frequency current mode architecture allows a phaselockable frequency of up to 600kHz, while an input/output constant current loop provides support for battery charging. 

With a wide 4.5V to 150V input and output range and seamless transfers between operating regions, the LTC3779 is ideal for automotive, telecom and batterypowered systems. 

The LTC3779 features a precision 1.2V reference and power good output indicator. The MODE pin can select between pulse-skipping mode or forced continuous mode of operation. Pulse-skipping mode offers high efficiency at light load while forced continuous mode operates at a constant frequency for noise sensitive applications. The PLLIN pin allows the IC to be synchronized to an external clock. The SS pin ramps the output voltage during start-up. Current foldback limits MOSFET heat dissipation during short-circuit conditions.

Applications

  • Industrial, Automotive, Medical, Military, Avionics
Part Models 6
1ku List Price Starting From $7.07

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Documentation

Documentation

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

PCN

Apr 6, 2022

- 22_0068

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

LTC3779EFE#PBF

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LTC3779EFE#TRPBF

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Filter by Model

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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

LTC3779EFE#PBF

PRODUCTION

LTC3779EFE#TRPBF

PRODUCTION

LTC3779HFE#PBF

PRODUCTION

LTC3779HFE#TRPBF

PRODUCTION

LTC3779IFE#PBF

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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

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DC2456A

LTC3779EFE Demo Board | 16V ≤ VIN ≤ 120V, VOUT = 48V @ 10A at up to 99% Efficiency

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DC2456A

LTC3779EFE Demo Board | 16V ≤ VIN ≤ 120V, VOUT = 48V @ 10A at up to 99% Efficiency

LTC3779EFE Demo Board | 16V ≤ VIN ≤ 120V, VOUT = 48V @ 10A at up to 99% Efficiency

Product Detail

Demonstration circuit 2456A is a high voltage, high efficiency synchronous buck-boost DC/DC converter with a 16V to 120V input voltage range. It can supply a 10A maximum load current with a 48V output. The demo board features the LTC3779EFE controller. The constant frequency current mode architecture allows a phase-lockable frequency of up to 600kHz, while an optional output current feedback loop provides support for applications such as battery charging. With a wide input range, wide output range and seamless transfers between operation modes, the LTC3779 is ideal for Industrial, Automotive, Medical, Military and Avionics applications. 


 

 

Tools & Simulations

Tools & Simulations 2

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.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

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