SY20133GDFC - High Efficiency 5.5V, 3A Continuous, 1MHz 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 Latch off Protection for Short Circuit
  • Reliable Latch off Protection for Output Over Voltage
  • 100% Dropout Operation
  • RoHS Compliant and Halogen Free
  • Compact Package: DFN2×2-8

Typical Application


The SY20133G is a high-efficiency, high frequency synchronous step-down DC/DC regulator capable of delivering up to 3A output current. The SY20133G 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.
SY20133G integrates reliable short circuit and over voltage protection.


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