SY20656ATRC - High Efficiency, Built-in Inductor, 1MHz, 2A, 18V Input Synchronous Step Down Regulator


  • Low RDS(ON) for Internal Switches (Top/Bottom): 50mΩ/30mΩ
  • 4.5-18V Input Voltage Range
  • 2A load Current Capability
  • ±1% 0.6V Reference
  • Pseudo-constant Frequency:1MHz
  • Instant PWM Architecture to Achieve Fast Transient Responses.
  • Internal Soft-start Limits the Inrush Current
  • Current Limit Fold-back Mode Output Short Circuit Protection
  • Over Temperature Protection with Auto Recovery
  • Cycle-by-cycle Peak Current Limitation
  • Input UVLO
  • RoHS Compliant and Halogen Free
  • Compact Package: QFN3×3-7

Typical Application


The SY20656A is a high efficiency, 1MHz synchronous step down DC/DC converter capable of delivering 2A current, which integrates an inductor into a compact 3×3×2mm package. The SY20656A operates over a wide input voltage range from 4.5V to 18V and integrates main switch and synchronous switch with very low RDS(ON) to minimize the conduction loss.

The SY20656A features enable control. The device also provides cycle-by-cycle current limit, short circuit protection and thermal shutdown protection for reliable operation.


  • Set Top Box
  • Portable TV
  • Access Point Router
  • DSL Modem
  • LCD TV
  • Telecom Applications