SY21241DQVC - High Efficiency Fast Response 10A Continuous/16A Peak, 28V Input Synchronous Step Down Regulator with VTT LDO


  • Low RDS(ON) for Internal Switches (Top/Bottom): 25/8mΩ
  • 4-28V Input Voltage Range
  • Instant PWM Architecture to Achieve Fast Transient Responses
  • Internal 400µs Soft-start Limits the Inrush Current
  • 600kHz Pseudo-constant Switching Frequency
  • 10A Continuous/16A Peak Output Current Capability of the Regulator
  • ±1.5% 0.6V Reference
  • Power Good Indicator
  • Over Temperature Alert
  • Output Tracking Discharge Function for the Regulator and VTT LDO
  • Output Under Voltage Latch Off Protection
  • Output Over Voltage Latch Off Protection
  • Input UVLO
  • ±2A Source/Sink Current Capability of the VTT LDO
  • Buffered Low Noise 10mA VTTREF Output
  • Support High-Z in S3 and Soft-Off in S4/S5
  • Over Temperature Protection
  • RoHS Compliant and Halogen Free
  • Compact Package: QFN3×4-19

Typical Application


The SY21241D develops a high efficiency synchronous step-down DC/DC regulator capable of delivering 10A continuous/16A peak current and a sink/source LDO capable of delivering ±2A current. The SY21241D operates over a wide input voltage range from 4V to 28V. The integrated low RDS(ON) switches minimize the conduction loss.

The DC/DC regulator adopts the instant PWM architecture to achieve fast transient responses for high step down applications and high efficiency at light loads. In addition, it operates at 600kHz pseudo-constant frequency under continuous conduction mode.


  • LCD-TV/Net-TV/3DTV
  • Set Top Box
  • Notebook
  • High Power AP