SY20113DFC - High Efficiency 5.5V, 3MHz, 3A Buck


  • Low RDS(ON) for Internal Switches(Top/Bottom):110mΩ/80mΩ
  • 3A Continuous Load Current Capability
  • 2.7-5.5V Input Voltage Range
  • High Switching Frequency Minimizes the External Components: 1MHz
  • Internal Soft-start Limits the Inrush Current
  • Reliable Short Circuit Protection:  Latch off Protection
  • Reliable Over-voltage Protection: Latch off Protection
  • 100% Dropout Operation
  • RoHS Compliant and Halogen Free
  • Compact Package: DFN2x2-8

Typical Application


The SY20113 is a high-efficiency, high frequency synchronous step-down DC/DC regulator capable of delivering up to 3A output current. The SY20113 operates 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 and small external inductor and capacitor sizes are achieved with 1MHz switching frequency.

SY20113 integrates reliable short circuit and over-voltage protection.


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