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RT5758是可在3V至6.5V輸入電壓範圍內輸出高達9A電流的高性能同步Buck轉換器,使用集成化的低R<SUB>DS(ON)</SUB>功率開關、0.6V參考電壓和自舉二極體,整體方案體積小巧,容易使用。</br>RT5758使用ACOT<SUP>TM</SUP>控制架構,具有超快的瞬態回應速度,週邊元件數量極少。在穩定狀態下,ACOT控制器工作在頻率基本不變的狀態下,與輸入電壓、負載大小和輸出電壓基本無關,EMI濾波器設計非常容易。</br>該器件提供獨立的使能控制輸入端子和Power Good指示信號,易於使用在需要時序控制的設計中。為了限制啟動期間的輸入電流衝擊,晶片提供了可用外部電容調節的軟起動端SS。晶片還集成有逐週期電流限制保護、欠壓保護、輸入欠壓鎖定保護和過熱保護功能。</br>RT5758的封裝形式為UQFN-13L 3x3 (FC)。
RT5758 電路圖
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<div class="spec-list"><ul class="lv1"><li>超快速瞬態回應 </li><li>1MH±20%穩定的工作頻率 </li><li>1.5%精度參考電壓 </li><li>ACOT<sup>TM</sup>控制架構 </li><li>根據負載輕重自動選擇PWM/PSM工作模式 </li><li>針對陶瓷輸出電容進行了優化 </li><li>輸入電壓範圍:3V至6.5V </li><li>預偏置啟動 </li><li>可調軟起動 </li><li>Power Good指示 </li><li>使能控制 </li><li>過流保護與過熱保護 </li><li>打嗝模式的欠壓保護 </li></ul></div>
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RT5758 訂購資訊
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<div class="spec-list"><ul class="lv1"><li>行動電話和掌上型設備 </li><li>機上盒,纜線數據機,xDSL設備 </li><li>WLAN設備,SSD/HDD存儲裝置 </li><li>通用負載點電壓調節器 </li><li>電視機 </li></ul></div>
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