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Product Spec Banner
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RT4805B允许系统利用新电池化学作用，当电池电压低于系统能源IC所需之电压时，可提供显著能源。借由结合内置功率电晶体，同步整流和低电源电流，该IC采用先进的锂电子电池化学系统作为一个简便的解决方案。</br>RT4805B是一个升压调节器，设计于从单节锂电池提供最小输出电压，即使电池电压低于系统最小值。在升压模式中，输出电压调节是保证2A的最大负载电流。在关机模式下的静态电流小于1μA，从而最大程度地延长电池寿命。调节器在旁路和正常升压模式中顺利转换，该装置可强制进入旁路模式，以减少静态电流。</br>RT4805B支援WL-CSP-16B 1.67x1.67 (BSC)封装。
RT4805B 电路图
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<div class="spec-list"><ul class="lv1"><li>4少量外部元件 : 0.47μH电感和0603尺寸输入及输出电容 </li><li>输入电压范围 : 1.8V~5V </li><li>输出电压范围 : 2.85V~4.4V <ul class="lv2"> <li></li><li>VSEL = L 3.15V </li><li>VSEL = H 3.6V </li></ul> </li><li>最大连续负载电流 : 2A@V<sub>IN</sub> > 2.65V，升压V<sub>OUT</sub>至3.35V </li><li>效率高达96% </li><li>当V<sub>IN</sub> > 目标V<sub>OUT</sub>，确实执行旁路操作 </li><li>内部同步整流 </li><li>关机时确实断开负载连接 </li><li>强制旁路模式 </li><li>V<sub>SEL</sub>控制优化目标V<sub>OUT</sub> </li><li>短路保护 </li><li>I<sup>2</sup>C控制介面 </li><li>超低工作静态电流 </li><li>WL-CSP 16B 小封装 </li></ul></div>
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RT4805B 订购信息
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RT4805B
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RT4805B
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<div class="spec-list"><ul class="lv1"><li>单节锂离子，LiFePO4智慧型手机或平板电脑 </li><li>2.5G/3G/4G 迷你模组数据卡 </li></ul></div>
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