SY20681QUC - High Efficiency, 4uA Ultra Low IQ, 3MHz, 0.6A Inductor Built-in Synchronous Step Down Regulator


  • Low RDS(ON) for Internal Switches (Top/Bottom) : 230mΩ/110mΩ
  • Integrate an Inductor to Minimizes the External Components and PCB Layout Design
  • 1.8~5.5V Input Voltage Range
  • 4μA Ultra Low Quiescent Current
  • High Switching Frequency 3MHz Minimizes the External Components
  • Internal Soft-start Limits the Inrush Current
  • 100% Dropout Operation
  • RoHS Compliant and Halogen Free
  • Compact Package: QFN2x1.5-8

Typical Application


The SY20681 is a 3MHz, 0.6A, 4μA ultra low quiescent current, synchronous step-down converter which integrates an inductor and a control IC in one tiny package (2.0mm×1.5mm, H=1.0mm). It can operate over a wide input voltage range from 1.8V to 5.5V and integrates main switch and synchronous switch with very low RDS (ON) to minimize the conduction loss.


  • Mobile Phone, Smart Phone
  • Bluetooth Headsets
  • Portable Game Console
  • Digital Camera, Camcorder