SY21072I Datasheet | Silergy

High Efficiency, Fast Response, 2.0A, 18V Input Synchronous Step Down Regulator General Description The SY21072I is a high efficiency, synchronous stepdown DC/DC converter capable of delivering 2A load current. The SY21072I operates over a wide input voltage range from 4.2V to 18V and integrates main switch and synchronous switch with very low RDS(ON) to minimize the conduction loss. The SY21072I 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 500k Hz to minimize the size of inductor and capacitor. Ordering Information SY21072- (- - )- Tempera ture Code Pa cka ge Code Optional Spec Code Ordering Number Package type Note SY21072IABC SOT23-6 ---- Typical Application Features - Low RDS(ON) for Internal Switches (Top/Bottom): 130mΩ/105mΩ - 4.2-18V Input Voltage Range - 2A Output Current Capability - 500k Hz Switching Frequency Minimize the External ponents - Stable with 10µF COUT and 1.5µH Inductor - Instant PWM Architecture to Achieve Fast Transient Responses - Internal Soft-start Limits the Inrush Current - Cycle-by-cycle Peak/Valley Current Limitation - Hic-cup Mode Output Short Circuit Protection - Thermal Shutdown with Auto Recovery - pact Package SOT23-6 Applications - Set Top Box - Portable...