LTC3411

PRODUCTION

LTC3411

1.25A, 4MHz, Synchronous Step-Down DC/DC Converter

PRODUCTION

Figure 1. Step-Down 2.5V/1.25A Regulator slide

Figure 1. Step-Down 2.5V/1.25A Regulator

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Part Models 8

1ku List Price Starting From $4.22

Features

Small 10-Lead MSOP or DFN Package
Uses Tiny Capacitors and Inductor
High Frequency Operation: Up to 4MHz
High Switch Current: 1.6A
Low R_DS(ON) Internal Switches: 0.110Ω
High Efficiency: Up to 95%
Stable with Ceramic Capacitors
Current Mode Operation for Excellent Line and Load Transient Response
Short-Circuit Protected
Low Dropout Operation: 100% Duty Cycle
Low Shutdown Current: I_Q ≤ 1μA
Low Quiescent Current: 60µA
Output Voltages from 0.8V to 5V
Selectable Burst Mode^® Operation
Sychronizable to External Clock

Additional Details

The LTC3411 is a constant frequency, synchronous, step- down DC/DC converter. Intended for medium power applications, it operates from a 2.63V to 5.5V input voltage range and has a user configurable operating frequency up to 4MHz, allowing the use of tiny, low cost capacitors and inductors 2mm or less in height. The output voltage is adjustable from 0.8V to 5V. Internal sychronous 0.11Ω power switches with 1.6A peak current ratings provide high efficiency. The LTC3411’s current mode architecture and external compensation allow the transient response to be optimized over a wide range of loads and output capacitors.

The LTC3411 can be configured for automatic power saving Burst Mode operation to reduce gate charge losses when the load current drops below the level required for continuous operation. For reduced noise and RF interference, the SYNC/MODE pin can be configured to skip pulses or provide forced continuous operation.

To further maximize battery life, the P-channel MOSFET is turned on continuously in dropout (100% duty cycle) with a low quiescent current of 60μA. In shutdown, the device draws <1μA.

Applications

Notebook Computers
Digital Cameras
Cellular Phones
Handheld Instruments
Board Mounted Power Supplies

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Support

Analog Devices Support Portal is a one-stop shop to answer all your ADI questions.

Visit the ADI Support Page

Ask the ADI community for help.

Ask the EngineerZone Community

FAQs

Sales & Ordering FAQs

Part Models 8

1ku List Price Starting From $4.22

Technical Documents 6

LTC3411: 1.25A, 4MHz, Synchronous Step-Down DC/DC Converter Data Sheet 11/21/2008

R457 Reliability Data 03/26/2018

DC441A - Demo Manual 09/24/2009

DN304 - 4MHz Monolithic Synchronous Step-Down Regulators Bring High Efficiency to Space-Sensitive Applications 03/26/2014

Monolithic 2A Buck Regulator Plus Linear Regulator Simplifies Wide Input Voltage Applications 01/01/2008

Small 1.25A Step-Down Regulator Switches at 4MHz for Space-Sensitive Applications 05/01/2002

Design Resources 8

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
LTC3411EDD#PBF	10-Lead DFN (3mm x 3mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3411EDD#TRPBF	10-Lead DFN (3mm x 3mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3411EMS#PBF	10-Lead MSOP	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3411EMS#TRPBF	10-Lead MSOP	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3411IDD#PBF	10-Lead DFN (3mm x 3mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3411IDD#TRPBF	10-Lead DFN (3mm x 3mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3411IMS#PBF	10-Lead MSOP	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3411IMS#TRPBF	10-Lead MSOP	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys

LTC3411EDD#PBF
Pin/Package Drawing
10-Lead DFN (3mm x 3mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LTC3411EDD#TRPBF
Pin/Package Drawing
10-Lead DFN (3mm x 3mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LTC3411EMS#PBF
Pin/Package Drawing
10-Lead MSOP
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LTC3411EMS#TRPBF
Pin/Package Drawing
10-Lead MSOP
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LTC3411IDD#PBF
Pin/Package Drawing
10-Lead DFN (3mm x 3mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LTC3411IDD#TRPBF
Pin/Package Drawing
10-Lead DFN (3mm x 3mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LTC3411IMS#PBF
Pin/Package Drawing
10-Lead MSOP
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LTC3411IMS#TRPBF
Pin/Package Drawing
10-Lead MSOP
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

PCN/PDN Information

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Product Lifecycle

PCN

Feb 4, 2020

- 20_0130

Laser Top Mark Conversion for 10-Lead MSOP Packages Assembled in ADPG and UTAC

LTC3411EMS#PBF

PRODUCTION

LTC3411EMS#TRPBF

PRODUCTION

LTC3411IMS#PBF

PRODUCTION

LTC3411IMS#TRPBF

PRODUCTION

pdf

PCN20_0130_Form

xls

Material_Report

Filter by Model

Part Models

Product Lifecycle

PCN

Feb 4, 2020

- 20_0130

Laser Top Mark Conversion for 10-Lead MSOP Packages Assembled in ADPG and UTAC

LTC3411EMS#PBF

PRODUCTION

LTC3411EMS#TRPBF

PRODUCTION

LTC3411IMS#PBF

PRODUCTION

LTC3411IMS#TRPBF

PRODUCTION

pdf

PCN20_0130_Form

xls

Material_Report

Alternative Parts 1

Parts	Product Life Cycle	Description
LTC3411A	PRODUCTION	1.25A, 4MHz, Synchronous Step-Down DC/DC Converter

DC441A

LTC3411EMS | 2.65V ≤ VIN ≤ 5.5V, VOUT = 1.8V/2.5V/3.3V @ 1.25A

DC441A

LTC3411EMS | 2.65V ≤ VIN ≤ 5.5V, VOUT = 1.8V/2.5V/3.3V @ 1.25A

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Product Detail

Demonstration circuit 441 is a constant-frequency stepdown converter, using the LTC3411 monolithic synchronous buck regulator. The DC441 has an input voltage range of 2.65V to 5.5V, and is capable of delivering up to 1.25A of output current. See the LTC3411A for input voltages down to 2.5V. The output voltage of the DC441 can be set to 1.8V, 2.5V or 3.3V using the appropriate jumper connection, or it can be set to an adjustable value down to 0.8V, the reference voltage of the LTC3411.

Resources

ZIP

DC441A - Design File

883.00K

PDF

DC441A - Demo Manual

474.00K

PDF

DC441A - Schematic

19.00K

DC441A

LTC3411EMS | 2.65V ≤ VIN ≤ 5.5V, VOUT = 1.8V/2.5V/3.3V @ 1.25A

LTspice 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.

Lt Spice

LTC3411 Demo Circuit - 1.25A, 4MHz, Synchronous Step-Down DC/DC Converter (3.3V to 1.0V @ 1A)

3.00K

Lt Spice

LTC3411 - Step-Down (Buck) Regulators

2.04 K

LTpowerCAD 1

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.

To open the project file for this circuit:

Step 1: Download and install LTpowerCAD on your computer.

Step 2: Click on the link(s) in the section below to download part-specific project files.

Step 3: If the project file doesn't run, right-click the link and select "Save Target As." Then start the LTpowerCAD tool and open the project file by selecing "Open Project" from the "File" menu.

LTpowerCAD download and documentation