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  2. Power Management
  3. Switching Regulators
  4. Step-Down (Buck) Regulators
  5. Internal Power Switch Buck Regulators
  6. LTC3407-2


Alternative Parts

Overview

Features and Benefits

  • 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 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 Synchronizable Oscillator
  • Small Thermally Enhanced MSOP and 3mm × 3mm DFN Packages
  • AEC-Q100 Qualified for Automotive Applications

Product Details

The LTC3407-2 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 ≤1.2mm. 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.

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 Reduce 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 Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (1)

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

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

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-2#PBF Material Declaration Reliability Data 10-Lead DFN (3mm x 3mm w/ EP)
LTC3407EDD-2#TRPBF Material Declaration Reliability Data 10-Lead DFN (3mm x 3mm w/ EP)
LTC3407EMSE-2#PBF Material Declaration Reliability Data 10-Lead MSOP w/ EP
LTC3407EMSE-2#TRPBF Material Declaration Reliability Data 10-Lead MSOP w/ EP
LTC3407EMSE-2#WPBF Material Declaration Reliability Data 10-Lead MSOP w/ EP
LTC3407EMSE-2#WTRPBF Material Declaration Reliability Data 10-Lead MSOP w/ EP
LTC3407IDD-2#PBF Material Declaration Reliability Data 10-Lead DFN (3mm x 3mm w/ EP)
LTC3407IDD-2#TRPBF Material Declaration Reliability Data 10-Lead DFN (3mm x 3mm w/ EP)
LTC3407IMSE-2#PBF Material Declaration Reliability Data 10-Lead MSOP w/ EP
LTC3407IMSE-2#TRPBF Material Declaration Reliability Data 10-Lead MSOP w/ EP
LTC3407IMSE-2#WPBF Material Declaration Reliability Data 10-Lead MSOP w/ EP
LTC3407IMSE-2#WTRPBF Material Declaration Reliability Data 10-Lead MSOP w/ EP
Wafer Fabrication Data R415 Reliability Data

PCN-PDN Information

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Sample & Buy


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Buy Now Pricing


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List Pricing


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Lead Times


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Sampling


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Price Table Help

 

Evaluation Boards

Pricing displayed is based on 1-piece.

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.