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  4. Step-Down (Buck) Regulators
  5. Multiple Output Buck Regulators
  6. LTC3315A

Data Sheet Rev. B
PDF
JP Rev. 0
User Guides Rev. 0
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Overview

Features and Benefits

  • Dual Outputs Each with 2A Output Current
  • High Efficiency: 19mΩ NMOS and 75mΩ PMOS
  • Wide Bandwidth, Fast Transient Response
  • Switching Frequency Synchronizable Up to 3MHz
  • VIN Range: 2.25V to 5.5V
  • VOUT Range: 0.5V to VIN
  • VOUT Accuracy: ±1%
  • Low Ripple Burst Mode® Operation
  • Peak Current Mode Control
  • Minimum On-Time: 25ns
  • Safely Tolerates Inductor Saturation in Overload
  • Shutdown Current: 1.2µA
  • Precision 400mV Enable Thresholds
  • Internal Soft-Start and Compensation
  • Power Good Output
  • Low Profile, Thermally Enhanced 12-Lead 2mm × 2mm × 0.74mm LQFN and 16-Ball 1.64mm × 1.64mm × 0.5mm WLCSP Packages
  • AEC-Q100 Qualified for Automotive Applications

Product Details

The LTC3315A features dual 2A monolithic synchronous step-down converters operating from a 2.25V to 5.5V input supply in one package for space-constrained applications with demanding performance requirements. Using constant frequency, peak current mode control at switching frequencies up to 3MHz with a minimum on-time as low as 25ns, both bucks achieve high efficiency and fast transient response in a very small application footprint.

The LTC3315A operates in forced continuous or pulse skip mode for low noise or in Burst Mode® operation for high efficiency at light loads. The common buck switching frequency is 2MHz and can be synchronized to an external oscillator via the MODE/SYNC pin.

The LTC3315A can regulate outputs as low as 500mV. Other features include precision enable thresholds, a PGOOD signal, output overvoltage protection, thermal shutdown, output short-circuit protection, and up to 100% duty cycle operation for low dropout. The LTC3315A is available in a compact 2mm × 2mm LQFN package and a 1.64mm × 1.64mm WLCSP package.

APPLICATIONS

  • Servers, Telecom Supplies, Optical Networking
  • Distributed DC Power Systems (POL)
  • FPGA, ASIC, µP Core Supplies
  • Industrial/Automotive/Communications

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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 (5)
  • Data Sheets (1)
  • Reliability Data (1)
  • User Guides (2)
  • Technical Articles (1)
    • 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.

    LTspice

    Models for the following parts are available in LTspice:

    LTC3315A
    LTC3315B

    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

    LTC3315A Project - DC2747A 3-5Vin to 1.2V/2A, 1.8V/2A, 2MHz

    Design tools for the following parts are available in LTpowerCAD:

    LTC3315A

    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
    LTC3315AACBZ-R7 Material Declaration Reliability Data CHIPS W/SOLDER BUMPS/WLCSP
    LTC3315AEV#TRMPBF Material Declaration Reliability Data 12-Lead LQFN (2mm x 2mm x 0.74mm)
    LTC3315AEV#TRPBF Material Declaration Reliability Data 12-Lead LQFN (2mm x 2mm x 0.74mm)
    LTC3315AEV#WTRMPBF Material Declaration Reliability Data 12-Lead LQFN (2mm x 2mm x 0.74mm)
    LTC3315AEV#WTRPBF Material Declaration Reliability Data 12-Lead LQFN (2mm x 2mm x 0.74mm)
    LTC3315AHV#TRMPBF Material Declaration Reliability Data 12-Lead LQFN (2mm x 2mm x 0.74mm)
    LTC3315AHV#TRPBF Material Declaration Reliability Data 12-Lead LQFN (2mm x 2mm x 0.74mm)
    LTC3315AHV#WTRMPBF Material Declaration Reliability Data 12-Lead LQFN (2mm x 2mm x 0.74mm)
    LTC3315AHV#WTRPBF Material Declaration Reliability Data 12-Lead LQFN (2mm x 2mm x 0.74mm)
    LTC3315AIV#TRMPBF Material Declaration Reliability Data 12-Lead LQFN (2mm x 2mm x 0.74mm)
    LTC3315AIV#TRPBF Material Declaration Reliability Data 12-Lead LQFN (2mm x 2mm x 0.74mm)
    LTC3315AIV#WTRMPBF Material Declaration Reliability Data 12-Lead LQFN (2mm x 2mm x 0.74mm)
    LTC3315AIV#WTRPBF Material Declaration Reliability Data 12-Lead LQFN (2mm x 2mm x 0.74mm)
    LTC3315AJV#TRMPBF Material Declaration Reliability Data 12-Lead LQFN (2mm x 2mm x 0.74mm)
    LTC3315AJV#TRPBF Material Declaration Reliability Data 12-Lead LQFN (2mm x 2mm x 0.74mm)
    LTC3315AJV#WTRMPBF Material Declaration Reliability Data 12-Lead LQFN (2mm x 2mm x 0.74mm)
    LTC3315AJV#WTRPBF Material Declaration Reliability Data 12-Lead LQFN (2mm x 2mm x 0.74mm)
    LTC3315AMPV#TRMPBF Material Declaration Reliability Data 12-Lead LQFN (2mm x 2mm x 0.74mm)
    LTC3315AMPV#TRPBF Material Declaration Reliability Data 12-Lead LQFN (2mm x 2mm x 0.74mm)
    Wafer Fabrication Data R523 Reliability Data

    Support & Discussions

    LTC3315A Contact ADI Technical Support »
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