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RT6273 是输入电压范围为 4.5V~17V、负载能力为 3A、简单易用的同步 Buck 转换器，它内含高精度参考电压源，集成了低 R<SUB>DS(ON)</SUB> MOSFET 功率开关，具有很高的转换效率。<BR>RT6273 采用改进型固定导通时间（ACOT<sup>®</sup>）控制架构，具有超快速的瞬态响应特性，外部元件少，在整个输入、输出和负载范围内的工作频率几乎保持恒定。在轻载条件下，RT6273A 以自动的 PSM 模式工作以保持其高转换效率，RT6273B 则工作于强制 PWM 模式以严格满足高输出电压调节精度的要求。<BR>RT6273 对通过上下桥 MOSFET 开关的电流都进行检测以实现强劲的过流保护，逐周期进行的电流限制功能可防范输出端短路、过流或电感饱和等恶劣状况可能导致的严重故障。它还内建软启动功能，可避免启动期间的电流冲击。它也具备输入欠压锁定保护、输出欠压保护和过热保护等功能，可在各种条件下保持安全和平稳的工作状态。
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<div class="spec-list"><ul class="lv1"><li>3A 转换器，集成 95mΩ/50mΩ MOSFET 功率开关 </li><li>持续电流供应能力 <ul class="lv2"> <li></li><li>TSOT-23-6 (FC)：3A </li><li>SOT-563 (FC)：2A </li></ul> </li><li>输出电压范围：0.765V~7V </li><li>改进型固定导通时间（ACOT<sup>®</sup>）控制架构 <ul class="lv2"> <li></li><li>超快速瞬态响应 </li><li>针对使用低 ESR 陶瓷输出电容进行了优化 </li></ul> </li><li>高精度反馈参考电压源：典型值±1% </li><li>可选工作模式 <ul class="lv2"> <li></li><li>RT6273A：PSM 节能模式 </li><li>RT6273B：强制 PWM 模式 </li></ul> </li><li>固定工作频率：1.4MHz </li><li>使能控制，内部固定 1ms 软启动 </li><li>输入欠压锁定保护 </li><li>保护功能 <ul class="lv2"> <li></li><li>打嗝模式的输出欠压保护 </li><li>上/下桥过流保护和过热保护 </li></ul> </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>机顶盒 </li><li>液晶电视机 </li><li>家用网络设备 </li><li>监控设备 </li><li>通用电压转换器 </li></ul></div>
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