SY21242ABC - High Efficiency 6V, 1MHz, 2.5A 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
  • Low RDS(ON): 120mΩ
  • RoHS Compliant and Halogen Free
  • Compact Package: SOT23-6

Typical Application


SY21242 is a high efficiency, current-mode control Boost DC to DC regulator with an integrated 120mΩ  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.


  • Solar Battery Charger
  • Backup Battery