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RT8012A為PWM雙通道同步降壓型DC/DC 轉換器,輸入電壓範圍從2.6V至5.5V,可調的輸出電壓範圍0.8V至5V,輸出電流可達2A。操作在固定頻率1.2MHz,可適用於採用價格較低廉、較小尺寸的電容與電感元件的應用電路設計中。雙通道的降壓型DC/DC 轉換器內建低導通阻的功率開關,增進了整體效率並減少了需要外加蕭特基二極體的必要性。RT8012A藉由近100%責任週期的操作提供了低壓差轉換的應用可有效延長掌上型裝置的電池使用壽命,並具備了致能控制與電源良好信號指示腳位元,可在一般的應用中,簡易的控制兩組轉換器的啟動順序。
RT8012A 電路圖
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<div class="spec-list"><ul class="lv1"><li>效率高達95% </li><li>1.2MHZ固定切換頻率 </li><li>1A 與1.5A 的兩組通道輸出電流 </li><li>低R<sub>DS(ON)</sub> 的內部開關 </li><li>不需外接蕭特基二極體 </li><li>0.8V的參考電壓允許低電壓輸出 </li><li>近100%的責任週期操作允許輸出低壓降轉換 </li><li>內建補償機制 </li><li>< 2μA 的關機電流 </li><li>輸出電壓電源良好信號指示 </li><li>內建緩啟動機制 </li><li>簡易的啟動順序控制 </li><li>過溫保護 </li><li>短路保護 </li><li>加強散熱特性的16-引腳 WQFN封裝 </li><li>符合RoHS規範與100%的引腳無鉛特性 </li></ul></div>
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RT8012A 訂購資訊
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<div class="spec-list"><ul class="lv1"><li>Portable Instruments </li><li>Microprocessors and DSP Core Supplies </li><li>Cellular Phones </li><li>Wireless and DSL Modems </li><li>PC Cards </li><li>Digital Cameras </li></ul></div>
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