SY20193LQWC - High Efficiency 1.0MHz, 3A Buck


  • Low RDS(ON) for Internal Switches (Top/Bottom) 85mΩ /50mΩ
  • 2.7~5.5V Input Voltage Range
  • 55µA Low Quiescent Current
  • Ultra Fast Load Transient Speed
  • High Switching Frequency 1.0MHz Minimizes the External Components
  • Internal Soft-start Limits the Inrush Current
  • Reliable Latch off Function When:Output Short, Thermal Shutdown, Output Voltage> 120% of  Regulated Voltage
  • Output Auto Discharge Function
  • RoHS Compliant and Halogen Free
  • Compact Package: QFN1.5×1.5-7

Typical Application


SY20193L is a high efficient 1.0MHz synchronous step down DC/DC regulator capable of delivering up to 3A output current. The SY20193L can operate over a wide input voltage range from 2.7V to 5.5V and integrates main switch and synchronous switch with very low RDS(ON) to minimize the conduction loss.
SY20193L integrates reliable latch off function when output over voltage, output short or thermal shutdown happens.
The low output voltage ripple, the small external inductor and the capacitor sizes are achieved with 1.0MHz switching frequency.


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