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  2. Power Management
  3. Switching Regulators
  4. Step-Up (Boost) Regulators
  5. Internal Power Switch Boost Regulators
  6. LTC3423

Data Sheet
JP
User Guides
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Overview

Features and Benefits

  • 1.5V to 5.5V Adjustable Output Voltage
  • Synchronous Rectification: Up to 95% Efficiency
  • 1A Switch Current (LTC3423) or
    2A Switch Current (LTC3424)
  • Fixed Frequency Operation Up to 3MHz
  • Wide Input Range: 0.5V to 5.5V (Operating)
  • Very Low Quiescent Current: 38µA (Burst Mode® Operation)
  • No External Schottky Diode Required
  • Synchronizable Switching Frequency
  • Burst Mode Enable Control
  • OPTI-LOOP® Compensation
  • Very Low Shutdown Current: <1µA
  • Small 10-Pin MSOP Package

Product Details

The LTC3423 and LTC3424 are high efficiency, fixed frequency, step-up DC/DC converters that can regulate output voltages as low as 1.5V from a single cell. An applied voltage of at least 2.7V to the VDD pin is required to power the internal control circuitry.

The devices include a 0.16Ω N-channel MOSFET switch and a 0.21Ω P-channel synchronous rectifier. The LTC3423 is intended for applications requiring less than 0.75W of output power and the LTC3424 for 1.5W or less. Switching frequencies up to 3MHz are programmed with an external timing resistor and the oscillator can be synchronized to an external clock.

Quiescent current is only 38µA in Burst Mode operation, maximizing battery life in portable applications. Burst Mode operation is user controlled and can be enabled by driving the MODE/SYNC pin high. If the MODE/SYNC pin has either a clock or is driven low then the operation is at constant fixed frequency.

Other features include a 1µA shutdown, thermal shutdown and current limit. The LTC3423 and LTC3424 are available in the 10-lead MSOP package. For applications requiring an output voltage greater than 2.6V, the LTC3401 and LTC3402 are recommended without the need of a separate voltage for the VDD pin.

Applications

  • Pagers
  • Handheld Instruments
  • Cordless Phones
  • Wireless Handsets
  • GPS Receivers
  • Battery Backup

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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 (1)
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    Tools & Simulations

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    Product Recommendations

    LTC3423 Companion Parts

    Recommended Suggested Oscillator

    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
    LTC3423EMS#PBF Material Declaration Reliability Data 10-Lead MSOP
    LTC3423EMS#TRPBF Material Declaration Reliability Data 10-Lead MSOP
    Wafer Fabrication Data R415 Reliability Data

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    • LTC3423EMS#PBF Production
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