SY21299DBC - High Current Step Up Regulator


  • Internal 9A Switch
  • Low RDS(ON) for Internal Switch: 65mΩ
  • Programmable Peak Current Limit
  • Programmable Constant OFF Time
  • Maximum Voltage Rating of Internal Switch 36V
  • Internal Soft-start Limiting the Inrush Current
  • RoHS Compliant and Halogen Free
  • Compact Package: DFN3×3-10

Typical Application


SY21299 is a high efficiency, current-mode control Boost DC to DC regulator with an integrated 65mΩ  RDS(ON) N-channel MOSFET. The OFF time and the peak current limit can be programmed for more applications.


  • Industry Control System
  • Battery Power System