Features and Benefits

  • Up to 92% Efficiency
  • Generates 3.3V at 100mA from a Single AA Cell
  • Low Start-Up Voltage: 0.85V
  • 1.2MHz Fixed Frequency Switching
  • Internal Synchronous Rectifier
  • 2.5V to 5V Output Range
  • Automatic Burst Mode® Operation (LTC3400)
  • Continuous Switching at Light Loads (LTC3400B)
  • Logic Controlled Shutdown (<1µA)
  • Antiringing Control Minimizes EMI
  • Tiny External Components
  • Low Profile (1mm) SOT-23 Package

Product Details

The LTC3400/LTC3400B are synchronous, fixed frequency, step-up DC/DC converters delivering high efficiency in a 6-lead ThinSOT package. Capable of supplying 3.3V at 100mA from a single AA cell input, the devices contain an internal NMOS switch and PMOS synchronous rectifier.

A switching frequency of 1.2MHz 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 LTC3400 features automatic shifting to power saving Burst Mode operation at light loads, while the LTC3400B features continuous switching at light loads. Antiringing control circuitry reduces EMI concerns by damping the inductor in discontinuous mode, and the devices feature low shutdown current of under 1µA.

Both devices are available in the low profile (1mm) SOT-23 package.

LTC3400 Burst Mode
LTC3400B Burst Mode Disabled
LTC3400-1 Connects Vin To Vout In Shutdown


  • Pagers
  • MP3 Players
  • Digital Cameras
  • LCD Bias Supplies
  • Handheld Instruments
  • Wireless Handsets
  • GPS Receivers

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)

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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.