矽力杰产品规格书SY8113I.pdf

Application Note: SY8113I High Efficiency, 3.0A, 18V Input Synchronous Step Down Regulator Advanced Design Specification General Description Features SY8113I is a high efficiency 500kHz synchronous • Low RDS(ON) for Internal Switches step-down DC/DC regulator capable of delivering up (Top/Bottom): 80mΩ/40mΩ to 3A load current. It can operate over a wide input • 4.2-18V Input Voltage Range voltage range from 4.2V to 18V and integrates main • 3A Output Current Capability switch and synchronous switch with very low RDS(ON) • 500kHz Switching Frequency Minimize the to minimize the conduction loss. External Components • Stable with 22µF C and 2.2µH Inductor OUT SY8113I adopts the instant PWM architecture to • Instant PWM Architecture to Achieve Fast achieve fast transient responses for high step down Transient Responses applications and high efficiency at light loads. In • Internal Soft-Start Limits the Inrush Current addition, it operates at pseudo-constant frequency of • Cycle-by-cycle Peak/Valley Current 500kHz to minimiz