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  5. LT3462

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

Features and Benefits

  • Integrated Schottky Rectifier
  • Fixed Frequency 1.2MHz/2.7MHz Operation
  • Very Low Noise: 1mVP-P Output Ripple
  • Low VCESAT Switch: 270mV at 250mA
  • −5V at 100mA from 5V Input
  • −12V at 30mA from 3.3V Input
  • Low Input Bias Current GND Based FB Input
  • Low Impedance (40Ω) 1.265V Reference Output
  • High Output Voltage: Up to −38V
  • Wide Input Range: 2.5V to 16V
  • Uses Tiny Surface Mount Components
  • Low Shutdown Current: <10µA
  • Low Profile (1mm) SOT-23 (ThinSOT™) Package
  • 8‑Lead DFN (2mm × 2mm × 0.75mm) Package, LT3462A Only

Product Details

The LT3462/LT3462A are general purpose fixed frequency current mode inverting DC/DC converters. Both devices feature an integrated Schottky and a low VCESAT switch allowing a small converter footprint and lower parts cost. The LT3462 switches at 1.2MHz while the LT3462A switches at 2.7MHz. These high speeds enable the use of tiny, low cost and low height capacitors and inductors.

The LT3462/LT3462A operate in a dual inductor inverting topology that filters both the input and output currents.Very low output voltage ripple approaching 1mVP-P can be achieved when ceramic capacitors are used. Fixed frequency switching ensures a clean output free from low frequency noise typically present with charge pump solutions.The 40V switch allows a VIN to VOUT differential ofup to 38V for dual inductor topologies.

Both devices provide a low impedance 1.265V reference output to supply the feedback resistor network. A ground referenced, high impedance FB input allows high feedback resistor values without compromising output accuracy.

Applications

  • CCD Bias
  • LCD Bias
  • GaAs FET Bias
  • General Purpose Negative Voltage Supply

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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)
  • User Guides (1)
  • Technical Articles (2)
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    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:

    LT3462
    LT3462A

    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
    LT3462AEDC#TRMPBF Material Declaration Reliability Data 8-Lead DFN (2mm x 2mm w/ EP)
    LT3462AEDC#TRPBF Material Declaration Reliability Data 8-Lead DFN (2mm x 2mm w/ EP)
    LT3462AES6#TRMPBF Material Declaration Reliability Data 6-Lead TSOT-23
    LT3462AES6#TRPBF Material Declaration Reliability Data 6-Lead TSOT-23
    LT3462ES6#TRMPBF Material Declaration Reliability Data 6-Lead TSOT-23
    LT3462ES6#TRPBF Material Declaration Reliability Data 6-Lead TSOT-23
    Wafer Fabrication Data R303 Reliability Data

    Support & Discussions

    LT3462 Discussions

    RE: LT3462 How to use
    RE: How to use LT3464
    All LT3462 Discussions
    LT3462 Contact ADI Technical Support »
    LT3462 Ask your question »
    LT3462 Contact ADI Technical Support » LT3462 Ask your question »

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