SY20112LARC - High Efficiency, 1.2MHz, 3A Synchronous Step Down Regulator


  • 2.5V to 5.5V Input Voltage Range
  • 50μA Low Quiescent Current
  • Low RDS(ON) for Internal Switches (Top/Bottom) 100mΩ /60mΩ
  • High Switching Frequency 1.2MHz Minimizes the External Components
  • Internal Soft-start Limits the Inrush Current
  • 100% Dropout Operation
  • Power Good Indicator
  • Reliable Latch off Function When:
       -- Output Under Voltage

       -- Thermal Shutdown

       -- Output Voltage>120% of Regulated Voltage

  • Output Auto Discharge Function
  • RoHS Compliant and Halogen Free
  • Compact Package: SOT563

Typical Application


The SY20112L is a high efficiency 1.2MHz synchronous step down DC/DC regulator, which is capable of delivering up to 3A output currents. It can operate over a wide input voltage range from 2.5V to 5.5V and integrate main switch and synchronous switch with very low RDS (ON) to minimize the conduction loss.

The SY20112L integrates the reliable latch-off function when output over voltage, output under voltage or thermal shutdown happens.

The SY20112L is in a space saving, low profile SOT563 package.


  • Set Top Box
  • USB Dongle
  • Media Player
  • Smart phone