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RT5761是简单易用、输入电压范围为2.5V~6V、负载能力为1A的同步Buck转换器，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 UDFN-6L 1.4x1 封装。<BR>它采用改进型固定导通时间ACOT<SUP>®</SUP>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，RT5761A工作于自动PSM模式以维持高转换效率，RT5761B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>RT5761之上、下桥同时参与电流检测和过流保护动作，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：2.5V~6V </li><li>集成120mΩ/80mΩ MOSFET功率开关 </li><li>1A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2.2MHz </li><li>轻载节能模式（RT5761A） </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（RT5760A/B） </li><li>上下桥均参与过流保护 </li><li>负向过电流保护（RT5761B） </li><li>输入欠压锁定保护 </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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