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

Features and Benefits

  • Wide VIN Range: 4.4V to 105V (110V Abs Max)
  • Ultralow EMI/EMC Emissions: CISPR 25 Compliant
  • 2µA IQ When Regulating 48VIN to 3.3VOUT
  • Fast and Accurate Output Current Programming and Monitoring with No External RSENSE
  • Brick Wall Current Limit
  • Low Minimum On-Time: 40ns
  • Wide VOUT Range: 1V to VIN
  • 100% Maximum Duty Cycle Operation
  • Programmable Fixed Frequency: 200kHz to 2MHz
  • Eight, Pin-Selectable Fixed (1.2V to 15V) or Adjustable Output Voltages
  • Selectable Pulse-Skipping or Low Ripple Burst Mode® Operation at Light Loads
  • PLL Synchronization to External Clock
  • EXTVCC LDO Powers Chip from VOUT = 3.3V to 40V
  • OPTI-LOOP® or Fixed Internal Compensation
  • Input and Output Overvoltage Protection
  • Thermally Enhanced (5mm × 6mm) QFN Package

Product Details

The LTC7103 is a high efficiency, monolithic synchronous step-down DC/DC converter utilizing a constant frequency, average current mode control architecture. It operates from an input voltage range of 4.4V to 105V and provides an adjustable regulated output voltage from 1V to VIN while delivering up to 2.3A of output current.

The LTC7103 features high frequency operation and a low minimum on-time that reduce inductor size and enable constant-frequency operation even at very high step-down ratios. In addition, the LTC7103 achieves the lowest possible dropout voltage with 100% maximum duty cycle operation. During light load operation, converter efficiency and output ripple can be optimized by selecting Burst Mode or pulse-skipping operation.

The LTC7103 includes accurate, high speed average current programming and monitoring without the need for an external sense resistor. Additional features include a bypass LDO to maximize efficiency, fixed or adjustable output voltage and loop compensation, and a wide array of protection features to enhance reliability.

APPLICATIONS

  • Battery Chargers and CC/CV Supplies
  • Automotive and Military Systems
  • Industrial, Avionics and Heavy Equipment
  • Medical Instruments and Telecommunication Systems

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 (1)

Documentation & Resources

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  • Data Sheets (1)
  • Reliability Data (1)
  • User Guides (1)
  • Product Selector Card (2)
  • Videos (1)
  • Press Releases (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.

    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

    LTC7103 Demo Circuit - High Efficiency, Low EMI Step-Down Regulator (5-100V to 5V @ 2.3A)

    Models for the following parts are available in LTspice:

    LTC7103
    LTC7103-1

    Reference Designs (1)

    Product Recommendations

    LTC7103 Companion Parts

    Recommended Related Parts

    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
    LTC7103EUHE#PBF Material Declaration Reliability Data 36-Lead QFN (5mm x 6mm x 0.75mm w/ EP)
    LTC7103EUHE#TRPBF Material Declaration Reliability Data 36-Lead QFN (5mm x 6mm x 0.75mm w/ EP)
    LTC7103HUHE#PBF Material Declaration Reliability Data 36-Lead QFN (5mm x 6mm x 0.75mm w/ EP)
    LTC7103HUHE#TRPBF Material Declaration Reliability Data 36-Lead QFN (5mm x 6mm x 0.75mm w/ EP)
    LTC7103IUHE#PBF Material Declaration Reliability Data 36-Lead QFN (5mm x 6mm x 0.75mm w/ EP)
    LTC7103IUHE#TRPBF Material Declaration Reliability Data 36-Lead QFN (5mm x 6mm x 0.75mm w/ EP)
    LTC7103MPUHE#PBF Material Declaration Reliability Data 36-Lead QFN (5mm x 6mm x 0.75mm w/ EP)
    LTC7103MPUHE#TRPBF Material Declaration Reliability Data 36-Lead QFN (5mm x 6mm x 0.75mm w/ EP)
    Wafer Fabrication Data R526 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
    • LTC7103EUHE#PBF Production
    • LTC7103EUHE#TRPBF Production
    • LTC7103HUHE#PBF Production
    • LTC7103HUHE#TRPBF Production
    • LTC7103IUHE#PBF Production
    • LTC7103IUHE#TRPBF Production
    • LTC7103MPUHE#PBF Production
    • LTC7103MPUHE#TRPBF Production

    Support & Discussions

    LTC7103 Discussions

    RE: [LTC7103] Design review request
    RE: About LTC7103
    All LTC7103 Discussions
    LTC7103 Contact ADI Technical Support »
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    LTC7103 Contact ADI Technical Support » LTC7103 Ask your question »

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