LTC3780

PRODUCTION

High Efficiency, Synchronous, 4-Switch Buck-Boost Controller

Data Sheet (Rev. G) Product Selection Table

Part Models: 10
1ku List Price: Starting From $6.16

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Part Details

Single Inductor Architecture Allows V_IN Above, Below or Equal to V_OUT
Wide V_IN Range: 4V to 36V Operation
Synchronous Rectification: Up to 98% Efficiency
Current Mode Control
±1% Output Voltage Accuracy: 0.8V < V_OUT < 30V
Phase-Lockable Fixed Frequency: 200kHz to 400kHz
Power Good Output Voltage Monitor

Internal LDO for MOSFET Supply
Quad N-Channel MOSFET Synchronous Drive
V_OUT Disconnected from V_IN During Shutdown
Adjustable Soft-Start Current Ramping
Foldback Output Current Limiting
Selectable Low Current Modes
Output Overvoltage Protection
Available in 24-Lead SSOP and Exposed Pad (5mm × 5mm) 32-Lead QFN Packages

Part Models: 10
1ku List Price: Starting From $6.16

Documentation

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
LTC3780EG#PBF	24-Lead SSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3780EG#TRPBF	24-Lead SSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3780EUH#PBF	32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3780EUH#TRPBF	32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3780IG#PBF	24-Lead SSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3780IG#TRPBF	24-Lead SSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3780IUH#PBF	32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3780IUH#TRPBF	32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3780MPG#PBF	24-Lead SSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3780MPG#TRPBF	24-Lead SSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Aug 6, 2022 - 22_0171 Laser Top Mark Conversion for SSOP Packages Assembled in PNG
		PCN22_0171_Form Material_Report Delta Qualification Matrix
LTC3780EG#PBF	PRODUCTION
LTC3780EG#TRPBF	PRODUCTION
LTC3780IG#PBF	PRODUCTION
LTC3780IG#TRPBF	PRODUCTION
LTC3780MPG#PBF	PRODUCTION
LTC3780MPG#TRPBF	PRODUCTION
Jan 20, 2022 - 21_0269 Addition of Alternate Assembly Site ASE Taiwan for Select LFCSP Products
		PCN21_0269_Form Material_Report Detailed Change Description Qualification Results Summary
LTC3780EUH#PBF	PRODUCTION
LTC3780EUH#TRPBF	PRODUCTION
LTC3780IUH#PBF	PRODUCTION
LTC3780IUH#TRPBF	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Hardware Ecosystem

Parts	Product Life Cycle	Description
µModule Buck-Boost Regulators 1
LTM4607	RECOMMENDED FOR NEW DESIGNS	36V_IN, 24V_OUT High Efﬁciency Buck-Boost DC/DC µModule (Power Module)

Parts	Product Life Cycle	Description
LTC3789	RECOMMENDED FOR NEW DESIGNS	High Efficiency, Synchronous, 4-Switch Buck-Boost Controller

Tools & Simulations

LTspice 3

Models for the following parts are available in LTspice:

LTC3780

LTpowerCAD 1

LTC3780 Project - High Efficiency, 4-Switch Buck-Boost Controller (5-32V to 12V @ 5A)

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

LTC3780EG Demo Board | Buck-Boost, 5V to 32VIN, VOUT = 12V @ 5A max

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Product Details

Demonstration circuit 686, featuring the LTC3780 controller, is a high efficiency buck-boost DC/DC converter that can regulate its output from input voltages both above and below the output. The demo board delivers 12V@5A from an input range of 5V to 32V.

Resources

DC686A - Demo Manual
362.00K

DC686A - Design File
1.00M

DC686A - Schematic
221.00K

LTC3780EUH Demo Board | Synchronous Buck-Boost Controller

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Product Details

Demonstration circuit 1155A is a compact high efficiency synchronous buck-boost DC/DC converter solution featuring the LTC3780EUH controller. with 6V to 32V input range. It can supply 2A maximum load current at 12V output. The constant frequency current mode architecture allows a phase-lockable frequency of up to 400kHz.

Resources

DC1155A - Design Files
714.00K

DC1155A - Demo Manual
502.00K

DC1155A - Schematic
53.00K

LTC3780EG/LTC4440ES6 Demo Board | Buck-Boost, VIN: 36V to 72V, VOUT 48V/5A

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Product Details

Demonstration circuit 1046A is a non-isolated, high efficiency buck-boost DC/DC supply featuring LTC3780EG and LTC4440ES6. The LTC3780 is a high performance 4-switch synchronous buck boost regulator and the LTC4440 is a 100V-rated FET driver. The input voltage of the demo board is designed for 36V to 72V. The output voltage is 48V. At 25C° room temperature, the maximum output current is 5A without a cooling fan and 6A with 150LFM air flow for cooling. An optional 12V bias flyback supply using the LTC3803 is stuffed on the board to power the LTC3780 and LTC4440.

Resources

DC1046A - Design File
1.00M

DC1046A - Demo Manual
721.00K

DC1046A - Schematic
54.00K

Latest Discussions

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LTC3780

Part Details

Documentation

Data Sheet 1

Reliability Data 1

User Guide 3

Application Note 1

Design Note 1

Technical Articles 2

Video 1

Hardware Ecosystem

Tools & Simulations

LTspice 3

Models for the following parts are available in LTspice:

LTpowerCAD 1

Evaluation Kits

Product Details

Resources

Product Details

Resources

Product Details

Resources

Latest Discussions

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