LTC3402 ā€“ 2A, 3MHz Micropower Synchronous Boost Converter


  • Synchronous Rectification: Up to 97% Efficiency
  • 2A Switch Current Rating
  • Fixed Frequency Operation Up to 3MHz
  • Wide Input Range: 0.5V to 5V
  • Very Low Quiescent Current: 38ĀµA (Burst Mode Operation)
  • 2.6V to 5V Adjustable Output Voltage
  • 0.85V (Typ) Start-Up Voltage
  • No External Schottky Diode Required (VOUTĀ < 4.3V)
  • Synchronizable Switching Frequency
  • Burst Mode Enable Control
  • Antiringing Control Reduces Switching Noise
  • PGOOD Output
  • OPTI-LOOP Compensation
  • Very Low Shutdown Current: <1ĀµA
  • Small 10-Pin MSOP Package


LTC3402 ā€“ 2A, 3MHz Micropower Synchronous Boost Converter


The LTC3402 is a high efficiency, fixed frequency, step-up DC/DC converter that operates from an input voltage below 1V. The device includes a 0.16 Ohms N-channel MOSFET switch and a 0.18 Ohms P-channel synchronous rectifier. Switching frequencies up to 3MHz are programmed with an external timing resistor and the oscillator can be synchronized to an external clock. An external Schottky diode is optional but will slightly improve efficiency.

Quiescent current is only 38ĀµA in Burst Mode operation, maximizing battery life in portable applications. Burst Mode operation is user controlled and can be enabled by driving the MODE/SYNC pin high. If the MODE/SYNC pin has either a clock or is driven low, then fixed frequency switching is enabled.

Other features include a 1ĀµA shutdown, antiringing control, open-drain power good output, thermal shutdown and current limit. The LTC3402 is available in the 10-lead thermally enhanced MSOP package. Lower current applications should use the 1A rated LTC3401 synchronous boost converter. Applications that require VOUTĀ < 2.6V should use the LTC3424.


  • Cellular Telephones
  • Handheld Computers
  • MP3 Players
  • 2-Way Pagers
  • GPS Receivers
  • Battery Backup Supplies
  • CCFL Backlights

About The Author

Ibrar Ayyub

I am an experienced technical writer holding a Master's degree in computer science from BZU Multan, Pakistan University. With a background spanning various industries, particularly in home automation and engineering, I have honed my skills in crafting clear and concise content. Proficient in leveraging infographics and diagrams, I strive to simplify complex concepts for readers. My strength lies in thorough research and presenting information in a structured and logical format.

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