SparkFun AP63203 Buck/BabyBuck Regulator Breakouts

SparkFun AP63203 Buck/BabyBuck Regulator Breakouts


SparkFun AP63203 Buck/BabyBuck Regulator Breakouts are 2A synchronous buck converter boards that operate at 3.8V to 32V wide input voltage range. These breakouts integrate a 125mΩ high-side and a 68mΩ low-side power MOSFET that provides high-efficiency step-down DC/DC conversion. The AP63203 breakout regulators feature a proprietary gate driver design and Frequency Spread Spectrum (FSS) for Electromagnetic Interference (EMI) reduction. These regulator breakouts offer 0.8V ±1% of the reference voltage, 22µA ultralow quiescent current, and 3.3V output voltage. The Buck regulator is available in a 1-inch x 1-inch board and the BabyBuck regulator is available in a 0.4-inch x 0.5-inch board.


  • Proprietary gate driver design for best EMI reduction
  • Frequency Spread Spectrum (FSS) to reduce EMI
  • Precision enable threshold to adjust UVLO
  • Totally lead-free and fully RoHS compliant
  • Halogen and antimony free
  • Protection circuitry:
    • Overvoltage protection
    • Cycle-by-Cycle peak current limit
    • Thermal shutdown


  • 3.8V to 32V input voltage range
  • Upto 2A continuous output current
  • 0.8V ±1% reference voltage
  • 22µA ultralow quiescent current
  • 3.3V fixed output voltage

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