Features and Benefits

  • Low Quiescent Current
    • 65µA in Active Mode
    • 1µA in Shutdown Mode
  • Switching Frequency is Non-Audible Over Entire Load Range
  • Integrated Power NPN:
    • 350mA Current Limit (LT3494A)
    • 180mA Current Limit (LT3494)
  • Integrated Schottky Diode
  • Integrated Output Disconnect
  • Integrated Output Dimming
  • Wide Input Range: 2.3V to 16V
  • Wide Output Range: Up to 40V
  • Tiny 8-Lead 3mm × 2mm DFN Package

Product Details

The LT3494/LT3494A are low noise boost converters with integrated power switch, Schottky diode and output disconnect circuitry. The parts use a novel* control technique resulting in low output voltage ripple as well as high efficiency over a wide load current range. This technique guarantees that the switching frequency stays above the audio band for the entire load range. The parts feature a high performance NPN power switch with a 350mA and 180mA current limit for the LT3494A and LT3494 respectively. The quiescent current is a low 65µA, which is further reduced to less than 1µA in shutdown. The internal disconnect circuitry allows the output voltage to be isolated from the input during shutdown. An auxiliary reference input (CTRL pin) overrides the internal 1.225V feedback reference with any lower value allowing full control of the output voltage during operation. The LT3494/LT3494A are available in a tiny 8-lead 3mm × 2mm DFN package.


  • OLED Power
  • Low Noise Power
  • MP3 Players

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 (2)

Tools & Simulations


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Models for the following parts are available in LTspice:


Reference Designs (1)

Product Recommendations

LT3494 Companion Parts

Recommended Related Parts

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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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.