Features and Benefits

  • Regulated Output with Input Voltages Above, Below, or Equal to the Output
  • Single Inductor, No Schottky Diodes Required
  • Manual or Programmable Automatic Burst Mode Operation
  • Programmable Average Input Current Limit
  • Up to 1.2A Continuous Output Current from a Single Lithium-Ion Cell
  • High Efficiency: Up to 95%
  • Output Disconnect in Shutdown
  • 2.4V to 5.5V Input Range
  • 2.4V to 5.25V Output Range
  • 35µA Quiescent Current in Burst Mode Operation
  • Programmable Frequency from 300kHz to 2MHz
  • <1µA Shutdown Current
  • Small, Thermally Enhanced 12-Lead (4mm × 3mm) DFN Package

Product Details

The LTC3442 is a highly efficient, fixed frequency, Buck-Boost DC/DC converter, which operates from input voltages above, below, and equal to the output voltage. The topology incorporated in the IC provides a continuous transfer function through all operating modes, making the product ideal for a single Lithium-Ion or multicell alkaline applications where the output voltage is within the battery voltage range.

The device includes two 0.10Ω N-channel MOSFET switches and two 0.10 Ohm P-channel switches. Operating frequency and average input current limit can each be programmed with an external resistor. Quiescent current is only 35µA in Burst Mode operation, maximizing battery life in portable applications. Automatic Burst Mode operation allows the user to program the load current for Burst Mode operation, or to control it manually.

Other features include 1µA shutdown current, programmable soft-start, peak current limit and thermal shutdown. The LTC3442 is available in a low profile, thermally enhanced 12-lead (4mm × 3mm × 0.75mm) DFN package.


  • PDA/'SMART' Phones
  • Handheld Computers
  • MP3 Players
  • Handheld Instruments
  • Digital Cameras
  • Wireless Handsets
  • USB Peripherals

Product Lifecycle icon-recommended Production

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)

Tools & Simulations


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Design Resources

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Evaluation Boards

Pricing displayed is based on 1-piece.

Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.

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.