SY21222ABC - High Efficiency 1MHz, 2A Step Up Regulator


  • Wide Input Range: 3-33V Bias Input, 33VOUT Max
  • 1MHz Switching Frequency
  • Minimum ON Time: 100ns Typical
  • Minimum OFF Time: 100ns Typical
  • Low RDS(ON): 200mΩ
  • RoHS Compliant And Halogen Free
  • Accurate Reference: 0.6VREF
  • Compact Package: SOT23-6

Typical Application


SY21222 is a high efficiency, current-mode controlBoostDCto DC regulator with an integrated 200mΩ  RDS(ON) N-channel MOSFET. The fixed 1MHz switching frequency and internal compensation reduce external component count and save the PCB space. The build-in internal soft start circuitry minimizes the inrush current at start-up.


  • Digital Camera
  • Cell Phone
  • PDA, PMP, MP3