LTC3779

RECOMMENDED FOR NEW DESIGNS

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

Data Sheet (Rev. A) Product Selection Table
Part Models
6
1ku List Price
Starting From $7.07
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Part Details

  • 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
LTC3779
150V VIN and VOUT Synchronous 4-Switch Buck-Boost Controller
LTC3779 Application Circuit LTC3779 Performance Graph LTC3779 Pin Configuration
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Design Note 1

Technical Articles 1

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Tools & Simulations

LTspice 2

Models for the following parts are available in LTspice:

  • LTC3779

LTpowerCAD 1

LTspice

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

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

eval board
schematic 1
schematic 2
schematic 3
schematic 4
DC2456A

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

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Product Details

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. 


 

 
DC2456A
LTC3779EFE Demo Board | 16V ≤ VIN ≤ 120V, VOUT = 48V @ 10A at up to 99% Efficiency
DC2456A Evaluation Board DC2456A Evaluation Board - Top View DC2456A Evaluation Board - Bottom View DC2456A

Latest Discussions

2 Years Ago
RE: LTC3779 damaged on EXTVCC pin
2 Years Ago
RE: LTC3779 modes of operation
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