SY21241AQVC -


·       Low RDS(ON) for Internal Switches (Top/Bottom): 25/8mΩ

·       4-28V Input Voltage Range

·       Instant PWM Architecture to Achieve Fast Transient Responses

·       Internal 400us 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

·       ±1A 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: QFN3x4-19

Typical Application


The SY21241A 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 +/-1A current. The SY21241A 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