SY21264ADBC - High Efficiency 6V, 4A, 1MHz Step Up Regulator


  • Wide Input Range: 2-6V
  • 1MHz Switching Frequency
  • Minimum ON Time: 100ns typical
  • Minimum OFF Time: 100ns typical
  • Max Output Voltage: 6V
  • Internal 4A Switch
  • Internal Soft-start
  • Over Temperature Protection
  • Over Current Protection
  • Low RDS(0N): 90mΩ typical
  • RoHS Compliant and Halogen Free
  • Compact Package: DFN3×3-10

Typical Application


SY21264A is a high efficiency, current-mode control Boost DC to DC regulator with an integrated 90mΩ  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.


  • 1-cell Li-ion Battery Powered Applications
  • Portable Devices