LTC3309B
Info : RECOMMENDED FOR NEW DESIGNS
searchIcon
cartIcon

LTC3309B

5V, 6A, 10 MHz Synchronous Step-Down Silent Switcher in 2mm × 2mm LQFN

Show More showmore-icon

Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Viewing: Part Details
arrow-icon

Not the part you were looking for?

viewall Go to Product Selection Table
file View Data Sheet (Rev.0)
Documentation View All Documentation
LTspice LTC3309B - Step-Down (Buck) Regulators Download 1.79 KB
Part Models 18
1ku List Price Starting From $2.24
Features
  • Pin Compatible with LTC3307(3A) and LTC3308(4A)
  • High Efficiency: 8mΩ NMOS, 31mΩ PMOS
  • Programmable Frequency 3MHz-10MHz
    • Tiny Inductor and Capacitors
  • Peak Current Mode Control
    • 22ns Minimum On-Time
    • Wide Bandwidth, Fast Transient Response
  • Silent Switcher™ Architecture
    • Ultralow EMI Emissions
  • Low Ripple Burst Mode® Operation with IQ of 40μA
  • Safely Tolerates Inductor Saturation in Overload
  • VIN Range: 2.25V to 5.5V
  • VOUT Range: 0.5V to VIN
  • VOUT Accuracy: ±1% Over Temperature Range
  • Precision 400mV Enable Threshold, 1μA in Shutdown
  • Power Good, Internal Compensation and Soft Start
  • Thermally Enhanced 2mm × 2mm LQFN Package
  • AEC-Q100 Qualified for Automotive Applications
    • Additional Details
    show more Icon

    The LTC3309B is a very small, high efficiency, low noise, monolithic synchronous 6A step-down DC/DC converter operating from a 2.25V to 5.5V input supply. Using constant frequency, peak current mode control at switching frequencies 3MHz-10MHz and minimum on-time as low as 22ns, this regulator achieves fast transient response with small external components. Silent Switcher architecture minimizes EMI emissions.

    The LTC3309B operates in forced continuous or pulse skip mode for low noise, or the low-ripple Burst Mode operation for high efficiency at light loads, ideal for battery-powered systems. The IC regulates output voltages as low as 500mV. Other features include output over-voltage protection, short-circuit protection, thermal shut-down, clock synchronization, and up to 100% duty cycle operation for low dropout. The device is available in a low profile 12-lead 2mm × 2mm × 0.74mm LQFN package with exposed pad for low thermal resistance.

    APPLICATIONS

    • Optical Networking, Servers, Telecom
    • Automotive, Industrial, Communications
    • Distributed DC Power Systems (POL)
    • FPGA, ASIC, µP Core Supplies
    Show More Arrow image
    file View Data Sheet (Rev.0)
    Documentation View All Documentation
    LTspice LTC3309B - Step-Down (Buck) Regulators Download 1.79 KB
    Part Models 18
    1ku List Price Starting From $2.24
    modal bookmark icon

    {{modalTitle}}

    modal close icon

    {{modalDescription}}

    {{dropdownTitle}}

    input down arrow
    • {{defaultSelectedText}}
      • {{#each projectNames}}
    • {{name}}
      • {{/each}} {{#if newProjectText}}
    • plus icon {{newProjectText}}
      • {{/if}}
    {{#if toggleButtonDescription}}
    {{toggleButtonDescription}}
    {{/if}} {{#if newProjectTitle}}

    {{newProjectTitle}}

    {{projectNameErrorText}}

    {{/if}}

    LTC3309B

    Documentation

    3
    overlayclose

    Filters

    1 Applied

    mobileoverlaydownarrow
    • All
      TickIcon
    • Data Sheet
    • Reliability Data
    • All
      TickIcon
    • English
    • Japanese
    resetfilter

    Reset Filters

    Data Sheet

    2

    PDF Vector

    PDF

    UPDATED 10/27/2020
    English

    LTC3309B: 5V, 6A Synchronous Step-Down Silent Switcher in 2mm × 2mm LQFN Data Sheet (Rev.0)

    Open PDF File

    redirect
    2.08 M
    download

    Download PDF

    PDF Vector

    PDF

    UPDATED 10/27/2020
    Japanese

    LTC3309B: 2mm×2mm LQFNパッケージの5V、6A同期整流式降圧Silent Switcher データシート

    Open PDF File

    redirect
    2.08 M
    download

    Download PDF

    Reliability Data

    1

    PDF Vector

    PDF

    UPDATED 03/24/2021
    English
    R523 Reliability Data redirect icon

    499.22 K

    download

    Download PDF

    There are no results matching this criteria. Try resetting your filters or searching for a different term

    close icon

    Documentation

    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
    LTC3309BEV#TRMPBF 12-Lead LQFN (2mm x 2mm x 0.74mm) external-link
    • HTML
    • Material Declaration external-link
    • HTML
    • Reliablity Data external-link
    LTC3309BEV#TRPBF 12-Lead LQFN (2mm x 2mm x 0.74mm) external-link
    • HTML
    • Material Declaration external-link
    • HTML
    • Reliablity Data external-link
    LTC3309BEV#WTRMPBF 12-Lead LQFN (2mm x 2mm x 0.74mm) external-link
    • HTML
    • Material Declaration external-link
    • HTML
    • Reliablity Data external-link
    LTC3309BEV#WTRPBF 12-Lead LQFN (2mm x 2mm x 0.74mm) external-link
    • HTML
    • Material Declaration external-link
    • HTML
    • Reliablity Data external-link
    LTC3309BHV#TRMPBF 12-Lead LQFN (2mm x 2mm x 0.74mm) external-link
    • HTML
    • Material Declaration external-link
    • HTML
    • Reliablity Data external-link
    LTC3309BHV#TRPBF 12-Lead LQFN (2mm x 2mm x 0.74mm) external-link
    • HTML
    • Material Declaration external-link
    • HTML
    • Reliablity Data external-link
    LTC3309BHV#WTRMPBF 12-Lead LQFN (2mm x 2mm x 0.74mm) external-link
    • HTML
    • Material Declaration external-link
    • HTML
    • Reliablity Data external-link
    LTC3309BHV#WTRPBF 12-Lead LQFN (2mm x 2mm x 0.74mm) external-link
    • HTML
    • Material Declaration external-link
    • HTML
    • Reliablity Data external-link
    LTC3309BIV#TRMPBF 12-Lead LQFN (2mm x 2mm x 0.74mm) external-link
    • HTML
    • Material Declaration external-link
    • HTML
    • Reliablity Data external-link
    LTC3309BIV#TRPBF 12-Lead LQFN (2mm x 2mm x 0.74mm) external-link
    • HTML
    • Material Declaration external-link
    • HTML
    • Reliablity Data external-link
    LTC3309BIV#WTRMPBF 12-Lead LQFN (2mm x 2mm x 0.74mm) external-link
    • HTML
    • Material Declaration external-link
    • HTML
    • Reliablity Data external-link
    LTC3309BIV#WTRPBF 12-Lead LQFN (2mm x 2mm x 0.74mm) external-link
    • HTML
    • Material Declaration external-link
    • HTML
    • Reliablity Data external-link
    LTC3309BJV#TRMPBF 12-Lead LQFN (2mm x 2mm x 0.74mm) external-link
    • HTML
    • Material Declaration external-link
    • HTML
    • Reliablity Data external-link
    LTC3309BJV#TRPBF 12-Lead LQFN (2mm x 2mm x 0.74mm) external-link
    • HTML
    • Material Declaration external-link
    • HTML
    • Reliablity Data external-link
    LTC3309BJV#WTRMPBF 12-Lead LQFN (2mm x 2mm x 0.74mm) external-link
    • HTML
    • Material Declaration external-link
    • HTML
    • Reliablity Data external-link
    LTC3309BJV#WTRPBF 12-Lead LQFN (2mm x 2mm x 0.74mm) external-link
    • HTML
    • Material Declaration external-link
    • HTML
    • Reliablity Data external-link
    LTC3309BMPV#TRMPBF 12-Lead LQFN (2mm x 2mm x 0.74mm) external-link
    • HTML
    • Material Declaration external-link
    • HTML
    • Reliablity Data external-link
    LTC3309BMPV#TRPBF 12-Lead LQFN (2mm x 2mm x 0.74mm) external-link
    • HTML
    • Material Declaration external-link
    • HTML
    • Reliablity Data external-link

    Software & Part Ecosystem

    Evaluation Kits 1

    reference details image

    DC3054A-C

    LTC3309B | 3.3V to 1.8V at 6A, 6.6MHz Low EMI Buck Regulator in a 0.47cm2 Solution

    zoom

    DC3054A-C

    LTC3309B | 3.3V to 1.8V at 6A, 6.6MHz Low EMI Buck Regulator in a 0.47cm2 Solution

    download icon

    Download

     print icon

    Print
    DC3054A-C
    LTC3309B | 3.3V to 1.8V at 6A, 6.6MHz Low EMI Buck Regulator in a 0.47cm2 Solution

    Features and Benefits

    Demonstration circuit 3054A-C features the LTC3309B 5V, 6A synchronous step-down Silent Switcher® operating as a 6.6MHz, 3.3V to 1.8V 6A buck regulator. The LTC3309B supports adjustable output voltages from 0.5V to VIN, and operating frequencies from 3MHz up to 10MHz. The LTC3309B is a compact, ultralow emission, high efficiency, and high speed synchronous monolithic step-down switching regulator. A minimum on-time of 22ns enables high VIN to low VOUT conversion ratios at high switching frequencies.

    The DC3054A-C operating mode may be selected as Burst Mode® operation, skip or forced continuous (FC) mode. Setting JP1 to the FC/SYNC position will allow the LTC3309B to sync to a clock frequency from 3MHz to 10MHz. The LTC3309B operates in forced continuous mode when syncing to an external clock. The DC3054A-C is set to a fixed 6.6MHz.

    The DC3054A-C is set to a fixed 6.6MHz frequency by connecting RT to VIN through a 0Ω resistor, R9. The frequency can be easily changed by removing R9 and setting an appropriate resistor in the R4 location to obtain the desired frequency. Refer to the LTC3309B data sheet for the proper RT value for a desired switching frequency.

    The LTC3309B data sheet gives a complete description of the device, operation and application information. The data sheet must be read in conjunction with this demo manual. The LTC3309B is assembled in a 2mm × 2mm LQFN package with exposed pads for low thermal resistance. The layout recommendations for low EMI operation and maximum thermal performance are available in the data sheet section Low EMI PCB Layout.

    Buy Now View Details

    Resources

    pdf icon

    PDF

    DC3054A-C - Demo Manual (Rev.0) Download

    1.33 M

    pdf icon

    ZIP

    DC3054A - Design Files Download

    5.7 M

    pdf icon

    PDF

    DC3054A - Schematic Download

    119.93 K

    Show More Arrow image

    Evaluation Kits1

    evaluation kit item images

    DC3054A-C

    LTC3309B | 3.3V to 1.8V at 6A, 6.6MHz Low EMI Buck Regulator in a 0.47cm2 Solution

    Tools & Simulations 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.

    spice tool Lt Spice

    LTC3309B - Step-Down (Buck) Regulators Download

    1.79 K

    Recently Viewed

    Part Details
    Documentation
    Evaluation Kit
    Tools & Simulations
    Latest Discussions