SY21051FCC -


·       Low RDS(ON) for Internal Switches (Top/Bottom): 500mΩ/240mΩ

·       7-100V Input Voltage Range

·      1AOutput Current Capability

·       Adjustable Switching Frequency

·       Instant PWM Architecture to Achieve Fast Transient Responses.

·       2ms Internal Soft-start Limits the Inrush Current

·       Precious +/-2% 1.2V Reference

·       RoHS Compliant and Halogen Free

·       Compact Package SO8E

Typical Application


SY21051 develops high efficiency synchronous step-down DC/DC converter capable of delivering 1.0A current. The SY21051 operates over a wide input voltage range from 7V to 100V and integrate main switch and synchronous switch with very low RDS(ON) to minimize the conduction loss.

The device adopts the instant PWM architecture to achieve fast transient responses for high step down applications.


·       Non-Isolated Telecommunication Buck Regulator

·       Secondary High Voltage Post Regulator

Automotive Systems