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  5. LT1613

Data Sheet
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User Guides
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Overview

Features and Benefits

  • Uses Tiny Capacitors and Inductor
  • Internally Compensated
  • Fixed Frequency 1.4MHz Operation
  • Operates with VIN as Low as 1.1V
  • 3V at 30mA from a Single Cell
  • 5V at 200mA from 3.3V Input
  • 15V at 60mA from Four Alkaline Cells
  • High Output Voltage: Up to 34V
  • Low Shutdown Current: <1µA
  • Low VCESAT Switch: 300mV at 300mA
  • 5-Lead SOT-23 Package

Product Details

The LT1613 is the industry’s first 5-lead SOT-23 current mode DC/DC converter. Intended for small, low power applications, it operates from an input voltage as low as 1.1V and switches at 1.4MHz, allowing the use of tiny, low cost capacitors and inductors 2mm or less in height. Its small size and high switching frequency enables the complete DC/DC converter function to take up less than 0.2 square inches of PC board area. Multiple output power supplies can now use a separate regulator for each output voltage, replacing cumbersome quasi-regulated approaches using a single regulator and a custom transformer.

A constant frequency, internally compensated current mode PWM architecture results in low, predictable output noise that is easy to filter. The high voltage switch on the LT1613 is rated at 36V, making the device ideal for boost converters up to 34V as well as for Single-Ended Primary Inductance Converter (SEPIC) and flyback designs. The device can generate 5V at up to 200mA from a 3.3V supply or 5V at 175mA from four alkaline cells in a SEPIC design.

The LT1613 is available in the 5-lead SOT-23 package.

Applications

  • Digital Cameras
  • Pagers
  • Cordless Phones
  • Battery Backup
  • LCD Bias
  • Medical Diagnostic Equipment
  • Local 5V or 12V Supply
  • External Modems
  • PC Cards

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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)

Documentation & Resources

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  • Data Sheets (1)
  • Reliability Data (1)
  • Application Notes (1)
  • User Guides (1)
  • Design Notes (2)
  • Technical Articles (4)
    • 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

    LT1613 Demo Circuit - 1.4MHz Single Cell DC/DC Converter (5V to 12V @ 130mA)

    Models for the following parts are available in LTspice:

    LT1613

    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
    LT1613CS5#TRMPBF Material Declaration Reliability Data 5-Lead TSOT-23
    LT1613CS5#TRPBF Material Declaration Reliability Data 5-Lead TSOT-23
    Wafer Fabrication Data R386 Reliability Data

    Support & Discussions

    LT1613 Contact ADI Technical Support »
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