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RT6338 系列产品是负载能力达8A、工作频率稳定在500kHz 的高效同步Buck 转换器,RT638A/B和RT6338AH/BH的输入电压范围为4.5V~23V,RT6338A/AH的输出电压范围为0.6V~5.5 V, RT6338B/BH 的输出电压为固定的3.3V。 RT6338C/CH 的输入电压范围为 5.2V-23V、输出电压为固定的 5.1V。 </br>RT6338 采用ACOT<sup>®</sup> 改进型固定导通时间控制架构,具有极快的瞬态响应速度,外围元件数量大幅减少,稳态工作时的工作频率几乎保持恒定,不受输入电压、负载电流及输出电压的影响,使电磁兼容滤波器的设计变得容易许多。 </br>通过对 EN/MODE 引脚电压的控制,RT6338 可选择工作于二极管仿真模式或超声模式以解决轻载效率下降问题。超声模式的工作频率高于 25kHz,因而不会带来可听见的音频噪声。二极管仿真模式可使轻载效率最佳化,同时还以频谱扩展方式降低音频噪声的影响。 </br>为了方便进行时序控制,RT6338 提供了 Power Good 输出。它还具有逐周期电流限制保护、过压保护、欠压保护、输入欠压锁定保护和过热保护等功能,其封装形式为 UQFN-23L 3x3 (FC)
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<li class="mv5">输入电压范围<br>►RT6338A/B 及 RT6338AH/BH:4.5V~23V<br>►RT6338C/CH:5.2V~23V</li><li class="mv5">输出电压<br>►RT6338A/AH:0.6V~5.5V<br>►RT6338B/BH:3.3V<br>►RT6338C/CH:5.1V</li><li class="mv5">连续电流负载能力:8A</li><li class="mv5">可与 POSCAP 和 MLCC 电容配合稳定工作</li><li class="mv5">瞬态响应速度快</li><li class="mv5">使用二极管仿真模式实现节能</li><li class="mv5">使用超声模式消除音频噪声</li><li class="mv5">电流连续模式工作频率基本稳定于 500kHz</li><li class="mv5">内部集成 26mΩ/14mΩ MOSFET 功率开关</li><li class="mv5">线性稳压器<br>►RT6338B/BH:3.3V/100mA<br>►RT6338C/CH:5V/100mA</li><li class="mv5">过流限制保护<br>►RT6338A/AH:10A、12A 或 14A 可调<br>►RT6338B/BH/C/CH:12A</li><li class="mv5">输出欠压、过压保护<br>►RT6338A/B/C:闭锁模式<br>►RT6338AH/BH/CH:打嗝模式的欠压保护和非闭锁模式的过压保护</li><li class="mv5">输入欠压闭锁保护</li><li class="mv5">过热保护<br>►RT6338A/B/C:闭锁模式<br>►RT6338AH/BH/CH:非闭锁模式</li>
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<li class="mv5">便携式电脑</li><li class="mv5">平板电脑</li><li class="mv5">网络设备</li><li class="mv5">服务器</li><li class="mv5">视频录像机</li><li class="mv5">平板电视和显示器</li><li class="mv5">分布式电源系统</li>
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