SY20123QWC - High Efficiency 2.0MHz, 1.5A Buck


  • 2.6~5.5V Input Voltage Range
  • 55µA Low Quiescent Current
  • Ultra Fast Load Transient Speed
  • Low RDS(ON) for Internal Switches (Top/Bottom) 180mΩ /100mΩ
  • High Switching Frequency 2.0MHz Minimizes the External Components
  • Internal Soft-start Limits the Inrush Current
  • Power Good Indicator
  • Output Auto Discharge Function
  • RoHS Compliant and Halogen Free
  • Compact Package: QFN1.5×1.5-7

Typical Application


SY20123 is a high efficiency 2.0MHz synchronous step down DC/DC regulator capable of delivering up to 1.5A output currents. It can operate over a wide input voltage range from 2.6V to 5.5V and integrate main switch and synchronous switch with very low RDS (ON) to minimize the conduction loss.
Low output voltage ripple, small external inductor and capacitor sizes are achieved with 2.0MHz switching frequency.


  • Smart Phone
  • Net PC
  • Mini-notebook PC
  • Access Point Router