LTC3779
RECOMMENDED FOR NEW DESIGNS150V VIN and VOUT Synchronous 4-Switch Buck-Boost Controller
- Part Models
- 6
- 1ku List Price
- Starting From $8.95
Overview
- 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
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
Documentation
Data Sheet 1
User Guide 1
Design Note 1
Technical Articles 1
Product Selector Card 2
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 |
|---|---|---|---|
| LTC3779EFE#PBF | 38-Lead TSSOP w/ EP | ||
| LTC3779EFE#TRPBF | 38-Lead TSSOP w/ EP | ||
| LTC3779HFE#PBF | 38-Lead TSSOP w/ EP | ||
| LTC3779HFE#TRPBF | 38-Lead TSSOP w/ EP | ||
| LTC3779IFE#PBF | 38-Lead TSSOP w/ EP | ||
| LTC3779IFE#TRPBF | 38-Lead TSSOP w/ EP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Apr 9, 2025 - 25_0016 Bond Wire Change from Gold to Copper Wire (Notification Only) |
||
| LTC3779EFE#PBF | PRODUCTION | |
| LTC3779EFE#TRPBF | PRODUCTION | |
| LTC3779HFE#PBF | PRODUCTION | |
| LTC3779HFE#TRPBF | PRODUCTION | |
|
Apr 6, 2022 - 22_0068 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 | PRODUCTION | |
| LTC3779IFE#TRPBF | PRODUCTION | |
|
Feb 14, 2025 - 25_0016 Bond Wire Change from Gold to Copper Wire (Notification Only) |
||
| LTC3779IFE#PBF | PRODUCTION | |
| LTC3779IFE#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Request a Driver/SoftwareTools & Simulations
LTspice 1
Models for the following parts are available in LTspice:
- LTC3779
LTpowerCAD 1
Design tools for the following parts are available in LTpowerCAD:
- LTC3779
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.
