LTC3407-4

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LTC3407-4

Dual Synchronous, 800mA, 2.25MHz Step-Down DC/DC Regulator

PRODUCTION

Part Details

2.5V/1.8V at 800mA Step-Down Regulators slide

LTC3407-4 Efﬁciency/Power Loss Curve slide

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Part Models 4

1ku List Price Starting From $3.54

Features

High Efficiency: Up to 95%
Very Low Quiescent Current: Only 40µA
2.25MHz Constant Frequency Operation
High Switch Current: 1.2A on Each Channel
No Schottky Diodes Required
Low R_DS(ON) Internal Switches: 0.35Ω
Current Mode Operation for Excellent Line and Load Transient Response
Short-Circuit Protected
Low Dropout Operation: 100% Duty Cycle
Ultralow Shutdown Current: I_Q < 1µA
Output Voltages from 5V down to 0.6V
Power-On Reset Output
Externally Synchronizable Oscillator
Small Thermally Enhanced MSOP and 3mm × 3mm DFN Packages

Additional Details

The LTC3407-4 is a dual, constant frequency, synchronous step down DC/DC converter. Intended for low power applications, it operates from 2.5V to 5.5V input voltage range and has a constant 2.25MHz switching frequency, allowing the use of tiny, low cost capacitors and inductors with a profile ≤1mm. Each output voltage is adjustable from 0.6V to 5V. Internal synchronous 0.35Ω, 1.2A power switches provide high efficiency without the need for external Schottky diodes.

A user selectable mode input is provided to allow the user to trade-off noise ripple for low power efficiency. Burst Mode^® operation provides high efficiency at light loads, while Pulse Skip Mode provides low noise ripple at light loads.

To further maximize battery life, the P-channel MOSFETs are turned on continuously in dropout (100% duty cycle), and both channels draw a total quiescent current of only 40µA. In shutdown, the device draws <1µA.

The LTC3407-4 is identical to the LTC3407-2 except for the reduced power-on reset delay time.


	Iout	Fsw	Features
LTC3407	2x 600mA	1.5MHz
LTC3407-2	2x 800mA	2.25MHz
LTC3407-3	2x 800mA	2.25MHz	Fixed 1.8V/3.3V
LTC3407-4	2x 800mA	2.25MHz	Reduced POR Delay
LTC3407A	2x 600mA	1.5MHz	Low Ripple Burst Mode
LTC3407A-2	2x 800mA	2.25MHz	Low Ripple Burst Mode

Applications

PDAs/Palmtop PCs
Digital Cameras
Cellular Phones
Portable Media Players
PC Cards
Wireless and DSL Modems

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Ask a Question

Submit your question below and we will return the best answer from ADI’s knowledge database:

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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 4

1ku List Price Starting From $3.54

Documentation

Technical Documents 2

LTC3407-4: Dual Synchronous, 800mA, 2.25MHz Step-Down DC/DC Regulator Data Sheet 08/07/2009

R415 Reliability Data 03/23/2018

Design Resources 4

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
LTC3407EDD-4#PBF	10-Lead DFN (3mm x 3mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3407EDD-4#TRPBF	10-Lead DFN (3mm x 3mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3407EMSE-4#PBF	10-Lead MSOP w/ EP	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3407EMSE-4#TRPBF	10-Lead MSOP w/ EP	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys

LTC3407EDD-4#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

LTC3407EDD-4#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

LTC3407EMSE-4#PBF
Pin/Package Drawing
10-Lead MSOP w/ EP
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LTC3407EMSE-4#TRPBF
Pin/Package Drawing
10-Lead MSOP w/ EP
Documentation

HTML Material Declaration

HTML Reliablity Data

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

PCN/PDN Information

Filter by Model

Part Models

Product Lifecycle

PCN

Jun 5, 2024

- 24_0003

Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2)

LTC3407EMSE-4#PBF

PRODUCTION

LTC3407EMSE-4#TRPBF

PRODUCTION

pdf

PCN24_0003_Form

xls

Material_Report

pdf

Qualification Results Summary

xlsm

Delta Qualification Matrix

Feb 4, 2020

- 20_0130

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

LTC3407EMSE-4#PBF

PRODUCTION

LTC3407EMSE-4#TRPBF

PRODUCTION

pdf

PCN20_0130_Form

xls

Material_Report

Filter by Model

Part Models

Product Lifecycle

PCN

Jun 5, 2024

- 24_0003

Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2)

LTC3407EMSE-4#PBF

PRODUCTION

LTC3407EMSE-4#TRPBF

PRODUCTION

pdf

PCN24_0003_Form

xls

Material_Report

pdf

Qualification Results Summary

xlsm

Delta Qualification Matrix

Feb 4, 2020

- 20_0130

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

LTC3407EMSE-4#PBF

PRODUCTION

LTC3407EMSE-4#TRPBF

PRODUCTION

pdf

PCN20_0130_Form

xls

Material_Report

Software & Part Ecosystem

Tools & Simulations

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 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