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RT5751 是简单易用的、输入电压范围为 2.8V-6V、负载能力为 1.5A 的同步 Buck 转换器，它内含 0.6V 高精度参考电压源，集成低 R<SUB>DS(ON)</SUB> MOSFET 功率开关，使用 WDFN-6L 2x2 、TSOT-23-5 和 TSOT-23-6 封装。<BR>RT5751 采用 ACOT<SUP>®</SUP> 改进型固定导通时间控制架构，外部元件少，瞬态响应速度快，在全输入、输出和负载范围内的工作频率几乎保持不变。在轻载条件下，RT5751C 工作于自动 PSM 模式以维持高转换效率，RT5751B 工作于强制 PWM 模式以满足应用对输出电压调整特性的需求。<BR>RT5751 对上、下桥之电流均进行检测以实现强劲的过流保护，逐周期进行的电流限制可确保器件在输出短路、过流或电感饱和时仍能安全无虞。其内建的软启动功能可避免启动期间的电流冲击。它还具有输入欠压锁定保护、输出欠压保护和过热保护等功能，在各种工作条件下都可确保安全和平稳的运作。
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<div class="spec-list"><ul class="lv1"><li>输入电压范围：2.8V-6V </li><li>集成 120mΩ/80mΩ MOSFET 功率开关 </li><li>1.5A 负载能力，效率高达 95% </li><li>低压差应用时，占空比可达 100% </li><li>1% 精度的内部参考电压源 </li><li>典型工作频率为 1.5MHz </li><li>轻载节能模式（RT5751C） </li><li>静态电流消耗：25μA（典型值） </li><li>快速响应的 ACOT<sup>®</sup> 控制架构 </li><li>内置软启动时间为 0.6ms </li><li>有使能输入 </li><li>有 Power Good 指示 </li><li>上下桥均参与过流保护 </li><li>负向过电流保护（RT5751D） </li><li>输入欠压闭锁保护 </li><li>打嗝模式的输出欠压保护 </li><li>过热保护 </li><li>符合 RoHS 规范，不含卤素 </li></ul></div>
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<div class="spec-list"><ul class="lv1"><li>移动电话和手持式设备 </li><li>机顶盒、电缆调制解调器等网通设备 </li><li>WLAN ASIC 电源和存储装置电源 </li><li>通用负载点低压 Buck 转换器 </li></ul></div>
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