The RT8020 is a dual high-efficiency Pulse-Width-Modulated (PWM) step-down DC-DC converter. It is capable of delivering 1A output current over a wide input voltage range from 2.5V to 5.5V, the RT8020 is ideally suited for portable electronic devices that are powered from 1-cell Li-ion battery or from other power sources within the range such as cellular phones, PDAs and other hand-held devices.
Two operational modes are ***ailable : PWM/Low-Dropout auto-switch and shutdown modes. Internal synchronous rectifier with low ***(ON)dramatically reduces conduction loss at PWM mode. No external Schottky diode is required in practical application.
The RT8020 enters Low-Dropout mode when normal PWM cannot provide regulated output voltage by continuously turning on the upper PMOS. The RT8020 enter shutdown mode and c***umes less than 0.1μA when EN pin is pulled low.
The switching ripple is easily ***oothed-out by ***all package filtering elements due to a fixed operation frequency of 1.5MHz. This along with ***all WDFN-12L 3x3 package provides ***all PCB area application. Other features include soft start, lower internal reference voltage with 2% accuracy, over temperature protection, and over current protection.
