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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 available : PWM/Low-Dropout auto-switch and shutdown modes. Internal synchronous rectifier with low R<sub>DS(ON)</sub> 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 P-MOSFET. The RT8020 enter shutdown mode and consumes less than 0.1μA when EN pin is pulled low. The switching ripple is easily smoothed-out by small package filtering elements due to a fixed operation frequency of 1.5MHz. This along with small WDFN-12L 3x3 package provides small PCB area application. Other features include soft start, lower internal reference voltage with 2% accuracy, over temperature protection, and over current protection.
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<div class="spec-list"><ul class="lv1"><li>2.5V to 5.5V Input Range </li><li>Adjustable Output From 0.6V to V<sub>IN</sub> </li><li>1.2V, 1.3V, 1.8V, 2.5V and 3.3V Fixed/Adjustable Output Voltage </li><li>1A Output Current </li><li>95% Efficiency </li><li>No Schottky Diode Required </li><li>50μA Quiescent Current per Channel </li><li>1.5MHz Fixed Frequency PWM Operation </li><li>Small 12-Lead WDFN Package </li><li>RoHS Compliant and Halogen Free </li></ul></div>
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<div class="spec-list"><ul class="lv1"><li>Mobile Phones </li><li>Personal Information Appliances </li><li>Wireless and DSL Modems </li><li>MP3 Players </li><li>Portable Instruments </li></ul></div>
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