SY20124QWC - High Efficiency 1.5MHz, 3A, Ultra Fast Dynamic Response Buck


  • 2.7~5.5V Input Voltage Range
  • 65µA Low Quiescent Current
  • Ultra Fast Load Transient Speed
  • Low RDS(ON) for Internal Switches (Top/Bottom) 85mΩ /50mΩ
  • High Switching Frequency 1.5MHz Minimizes the External Components
  • Internal Soft-start Limits the Inrush Current
  • Reliable  Short Circuit Protection
  • Hic-cup Mode Protection
  • Reliable OVP and OTP Protection
  • Output Auto Discharge Function
  • RoHS Compliant and Halogen Free
  • Compact Package: QFN1.5×1.5-7

Typical Application


The SY20124 is a high efficiency 1.5MHz synchronous step down DC/DC regulators capable of delivering up to 3A output current. The SY20124 can operate over a wide input voltage range from 2.7V 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 1.5MHz switching frequency.


  • Smart Phone
  • LCD TV
  • Set Top Box
  • Mini-notebook PC
  • Access Point Router