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LTC3129
LTC3129

15V, 200mA Synchronous Buck-Boost DC/DC Converter with 1.3μA Quiescent Current

Overview

Features and Benefits

  • 680nA Input Quiescent Current (Output in Regulation at No Load)
  • 1.8V to 5.5V Input Operating Range
  • Selectable Output Voltages of 1.8V, 2.5V, 2.8V, 3V, 3.3V, 3.6V, 4.5V, 5V
  • Integrated Coulomb Counter Measures Accumulated Battery Discharge
  • ±5% Battery Discharge Measurement Accuracy
  • Programmable Peak Input Current of 5mA, 10mA, 15mA, 25mA, 50mA, 100mA, 150mA, 250mA
  • Up to 50mA of Output Current
  • Up to 90% Efficiency
  • Programmable Coulomb Counter Prescaler for Wide Range of Battery Sizes
  • Programmable Discharge Alarm Threshold
  • I2C Interface
  • Low Profile (0.75mm) 20-Lead (3mm × 4mm) QFN Package

Product Details

The LTC3335 is a high efficiency, low quiescent current (680nA) buck-boost DC/DC converter with an integrated precision coulomb counter which monitors accumulated battery discharge in long life battery powered applications. The buck-boost can operate down to 1.8V on its input and provides eight pin-selectable output voltages with up to 50mA of output current.

The coulomb counter stores the accumulated battery discharge in an internal register accessible via an I2C interface. The LTC3335 features a programmable discharge alarm threshold. When the threshold is reached, an interrupt is generated at the IRQ pin.

To accommodate a wide range of battery types and sizes, the peak input current can be selected from as low as 5mA to as high as 250mA and the full-scale coulomb counter has a programmable range of 32,768:1.

The LTC3335 is available in a 3mm × 4mm QFN-20 package.

Applications

  • Long Lifetime Primary Cell Battery Applications
  • Wireless Sensors
  • Remote Monitors
  • Dust Networks® SmartMesh® Applications

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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.

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Documentation & Resources

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  • Technical Articles (4)
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    Tools & Simulations

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    Linduino code repository on GitHub and instructions on how to use the code.

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    Linduino

    Code Files

    LTC3335 - Linduino.CPP File
    LTC3335 - Linduino Header File
    LTC3335 - DC2343A.ino
    LTC3335_Correction_Tables.cpp
    LTC3335_Config.h

    Product Recommendations

    LTC3335 Companion Parts

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    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.

    LTC3335 Material Declaration
    Quality And Reliability
    Symbols and Footprints

    Support & Discussions

    LTC3335 Discussions

    RE: Difference between LTC3335IUDC#PBF and LTC3335EUDC#PBF
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    Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.