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The RT8020J 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 RT8020J 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. <p align="justify">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. </p><p align="justify">The RT8020J enters Low-Dropout mode when normal PWM cannot provide regulated output voltage by continuously turning on the upper P-MOSFET. The RT8020J enter shutdown mode and consumes less than 0.1&mu;A when EN pin is pulled low. </p><p align="justify">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.</p>
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  • 2.5V 至5.5V 输入范围
  • 可调输出范围0.6V 至VIN
  • 1.2V、1.3V、 1.8V、 2.5V 与 3.3V 的固定/可调 输出电压
  • 1A 输出电流
  • 效率达95%
  • 不需外加萧特基二极管
  • 每通道50μA 的静态电流
  • 1.5MHz 固定频率的PWM操作
  • 小型的 12-引脚 WDFN 封装
  • 符合RoHS规范与100%的引脚无铅特性
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Mobile Phones Personal Information Appliances Wireless and DSL Modems MP3 Players Portable Instruments
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