Features and Benefits

  • Delivers 3.3V at 900mA From 2 Alkaline/NiMH Cells
  • Delivers 5V at 900mA From a Lithium-Polymer Battery
  • VIN Start-Up Voltage: 700mV
  • 1.5V to 5.25V VOUT Range
  • Up to 94% Efficiency
  • VIN > VOUT Operation
  • ±1.5% Feedback Voltage Tolerance
  • 1MHz (LTC3539) or 2MHz (LTC3539-2) Fixed Frequency Operation
  • Output Disconnect
  • Selectable Burst Mode® or PWM Operation
  • 10μA Quiescent Current
  • Logic Controlled Shutdown: <1μA
  • Requires Only 6 External Components
  • Low Profile (2mm × 3mm × 0.75mm) DFN Package

Product Details

The LTC3539/LTC3539-2 are synchronous, 2A step-up DC/DC converters with output disconnect. Synchronous rectification enables high efficiency in the low profile 2mm × 3mm DFN package. Battery life is extended with a 700mV start-up voltage and operation down to 500mV once started.

A switching frequency of 1MHz (LTC3539) or 2MHz (LTC3539-2) minimizes solution footprint by allowing the use of tiny, low profile inductors and ceramic capacitors. The current mode PWM design is internally compensated, reducing external parts count. The LTC3539/LTC3539-2 feature a pin-enabled automatic Burst Mode operation at light load conditions. Anti-ring circuitry reduces EMI by damping the inductor in discontinuous mode. Additional features include a low shutdown current of under 1μA and thermal overload protection.

The LTC3539/LTC3539-2 are offered in a 2mm × 3mm × 0.75mm DFN package.


  • Medical Instruments
  • Portable Bar Code Scanners
  • Noise Canceling Headphones
  • Portable GPS Navigation
  • Handheld PCs

Product Lifecycle icon-recommended Recommended for New Designs

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.

Evaluation Kits (2)

Tools & Simulations


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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.

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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.