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  6. LTC3407

Data Sheet
JP
User Guides
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Alternative Parts

LTC3407A
LTC3407A

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

Overview

Features and Benefits

  • 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 RDS(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: IQ < 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

Product 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

Product Categories

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Product Lifecycle icon-recommended Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

Evaluation Kits (2)

Documentation & Resources

  • View All (8)
  • Data Sheets (1)
  • Reliability Data (1)
  • User Guides (2)
  • Design Notes (2)
  • Technical Articles (2)
    • Document Type

    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.

    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.

    LTspice

    LTspice Simulations

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

    Models for the following parts are available in LTspice:

    LTC3407
    LTC3407-2
    LTC3407-3
    LTC3407-4
    LTC3407A
    LTC3407A-2

    LTpowerCAD

    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

    LTpowerCAD Project Files

    LTC3407 Project - Dual 600mA, 1.5MHz Monolithic, Synchronous Step-Down Regulator (2.7-5.5V to 2.5V @ 600mA)

    Design tools for the following parts are available in LTpowerCAD:

    LTC3407
    LTC3407-2
    LTC3407-3
    LTC3407-4

    Design Resources

    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 Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
    LTC3407EDD#PBF Material Declaration Reliability Data 10-Lead DFN (3mm x 3mm w/ EP)
    LTC3407EDD#TRPBF Material Declaration Reliability Data 10-Lead DFN (3mm x 3mm w/ EP)
    LTC3407EMSE#PBF Material Declaration Reliability Data 10-Lead MSOP w/ EP
    LTC3407EMSE#TRPBF Material Declaration Reliability Data 10-Lead MSOP w/ EP
    Wafer Fabrication Data R415 Reliability Data

    PCN-PDN Information

    Select a model from the dropdown below to subscribe to PCN/PDN notifications and view past notifications as well.

    Select Model for PCN Information
    • LTC3407EMSE#PBF Production
    • LTC3407EMSE#TRPBF Production

    Support & Discussions

    LTC3407 Discussions

    RE: LTC3407-2 Sync Clarification
    All LTC3407 Discussions
    LTC3407 Contact ADI Technical Support »
    LTC3407 Ask your question »
    LTC3407 Contact ADI Technical Support » LTC3407 Ask your question »

    Sample & Buy


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    Evaluation Boards

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    Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.

    Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.

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