LTC3407

RECOMMENDED FOR NEW DESIGNS

LTC3407

Dual Synchronous, 600mA, 1.5MHz Step-Down DC/DC Regulator

RECOMMENDED FOR NEW DESIGNS

Part Details

Figure 1. 2.5V/1.8V at 600mA Step-Down Regulators slide

Figure 1. 2.5V/1.8V at 600mA Step-Down Regulators

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Part Models 4

1ku List Price Starting From $3.45

Features

High Efficiency: Up to 96%
Very Low Quiescent Current: Only 40µA
1.5MHz Constant Frequency Operation
High Switch Current: 1A 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 Sychronizable Oscillator
Small Thermally Enhanced MSOP Package and 3mm x 3mm DFN Packages

Additional Details

The LTC3407 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 1.5MHz switching frequency, allowing the use of tiny, low cost capacitors and inductors 2mm or less in height. Each output voltage is adjustable from 0.6V to 5V. Internal synchronous 0.35Ω, 1A 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 ripple noise for low power efficiency. Burst Mode^® operation provides high efficiency at light loads, while pulse-skipping mode provides low ripple noise 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.


	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

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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 $3.45

Documentation

Technical Documents 6

LTC3407: Dual Synchronous, 600mA, 1.5MHz Step-Down DC/DC Regulator Data Sheet 08/07/2009

R415 Reliability Data 03/23/2018

DC568A - Demo Manual 09/24/2009

DC701A - Demo Manual 09/24/2009

Design Solutions 41 - Dual Output DC/DC Converter Solutions for Xilinx FPGA Based Systems 08/21/2007

Design Solutions 43 - High Performance Switch Mode Power Solutions for Altera Low Voltage FPGAs 08/21/2007

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

LTC3407EDD#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#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#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#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

Feb 4, 2020

- 20_0130

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

LTC3407EMSE#PBF

PRODUCTION

LTC3407EMSE#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

LTC3407EMSE#PBF

PRODUCTION

LTC3407EMSE#TRPBF

PRODUCTION

pdf

PCN20_0130_Form

xls

Material_Report

Software & Part Ecosystem

Alternative Parts 1

Parts	Product Life Cycle	Description
LTC3407A	PRODUCTION	Dual Synchronous 600mA, 1.5MHz Step-Down DC/DC Regulator

Evaluation Kit

DC701A

LTC3407EDD Demo Board | (DFN) VIN = 2.5V to 5.5V, VOUT1 = 1.2V / 1.5V/1.8V @ 600mA, VOUT2 = 2.5V @ 600mA

DC701A

LTC3407EDD Demo Board | (DFN) VIN = 2.5V to 5.5V, VOUT1 = 1.2V / 1.5V/1.8V @ 600mA, VOUT2 = 2.5V @ 600mA

Buy Now View Details

Product Detail

Demonstration circuit 701 is a Dual Synchronous, 600mA, 1.5MHz Step-Down DC/DC Regulator featuring the LTC3407 in the 3x3 DFN-10 package. The DC701 has an input voltage range of 2.5V to 5.5V, and either output is capable of delivering up to 600mA of output current. In Burst Mode^® operation, the LTC3407 requires only 40uA of quiescent current; in Pulse Skip mode, the LTC3407 provides lower output ripple voltage at light load currents. The DC701 can provide up to 96% efficiency on either channel and consumes less than 1uA in shutdown.

Resources

PDF

DC701A - Schematic

20.00K

PDF

DC701A - Demo Manual

143.00K

ZIP

DC701A - Design File

606.00K

DC568A

LTC3407EMSE Demo Board | (MSOP) VIN = 2.5V to 5.5V, VOUT1 = 1.2V/1.5V/1.8V @ 600mA, VOUT2 = 2.5V @ 600mA

DC568A

LTC3407EMSE Demo Board | (MSOP) VIN = 2.5V to 5.5V, VOUT1 = 1.2V/1.5V/1.8V @ 600mA, VOUT2 = 2.5V @ 600mA

Buy Now View Details

Product Detail

Demonstration circuit 568 is a Dual Synchronous, 600mA, 1.5MHz Step-Down DC/DC Regulator featuring the LTC3407 in the MSOP-10 exposed pad package. The DC568 has an input voltage range of 2.5V to 5.5V, and either output is capable of delivering up to 600mA of output current. In Burst Mode^® operation, the LTC3407 requires only 40uA of quiescent current; in Pulse Skip mode, the LTC3407 provides lower output ripple voltage at light load currents. The DC568 can provide up to 96% efficiency on either channel and consumes less than 1uA in shutdown.

Resources

PDF

DC568A - Demo Manual

442.00K

ZIP

DC568A - Design File

0.00M

PDF

DC568A - Schematic

51.00K

DC701A

LTC3407EDD Demo Board | (DFN) VIN = 2.5V to 5.5V, VOUT1 = 1.2V / 1.5V/1.8V @ 600mA, VOUT2 = 2.5V @ 600mA

DC568A

LTC3407EMSE Demo Board | (MSOP) VIN = 2.5V to 5.5V, VOUT1 = 1.2V/1.5V/1.8V @ 600mA, VOUT2 = 2.5V @ 600mA

Tools & Simulations

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

LTC3407 Demo Circuit - Dual 1.5MHz, 600mA, Synchronous Step-Down Regulator (3.3V to 1.2V @ 600mA & 1.8V @ 600mA)

4.00K

Lt Spice

LTC3407 - Step-Down (Buck) Regulators

2.19 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