•   4.0-28V Wide Input Voltage Range
•   Low R_DS(ON) for Internal Switches: 20/10mΩ
•   Instant PWM Architecture to Achieve Fast Transient Response
•   Internal 600μs Soft-start Limits the Inrush Current
•   Pseudo-constant Frequency: 800kHz
•   8A Continuous, 16A Peak Output Current Capability
•   ±1% 0.6V Reference Voltage
•   Hiccup Mode SCP, OVP
•   Thermal Shutdown with Auto Recovery
•   RoHS Compliant and Halogen Free
•   Compact Package: QFN3x3-12

The SY21228A develops a high efficiency synchronous step-down DC/DC regulator capable of delivering 8A continuous, 16A peak current. The SY21228A operates over a wide input voltage range from 4.0V to 28V and integrates main switch and synchronous switch with very low R_DS(ON) to minimize the conduction loss.

 The SY21228A 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 pseudo-constant frequency of 800kHz under continuous conduction mode to minimize the size of inductor and capacitor.