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RT6278是简单易用的8A同步Buck转换器，输入电压范围为4.5V~23V，内建高精度0.6V参考电压和R<SUB>DS(ON)</SUB> MOSFET功率开关，使用晶核倒装的UQFN-12HL 3x3封装，以改进型固定导通时间 (ACOT<sup>®</sup>) 控制架构提供超快的瞬态响应速度，外围元件少，在各种运作条件下都具有几乎不变的开关工作频率，具有很好的输出电压调节精准度。RT6278在轻载时自动进入PSM模式以维持高转换效率，RT6278采用强制PWM工作模式以满足严格的电压调节精准度要求。它们对上、下桥的电流都进行检测以获得强壮的过流保护性能，每个周期都进行的过流保护可最大程度地防止输出短路、过流和电感饱和等现象可能导致的灾难性后果。它内建的软启动功能可避免启动期间出现的浪涌电流，还具有输入欠压锁定保护、输出欠压/过压保护、过热保护 (热关机) 等安全机制，确保其在各种工作条件下均可稳定运行。RT6278采用UQFN-12HL 3x3 (FC) 封装。
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<div class="spec-list"><ul class="lv1"><li>8A转换器，内置24mΩ/12mΩ R<sub>DS(ON)</sub>功率开关 </li><li>输入电压范围：4.5V~23V </li><li>输出电压范围：0.6V~6V </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>无需外部补偿 </li><li>针对低ESR陶瓷输出电容进行了优化 </li></ul> </li><li>反馈参考电压为0.6V±1% </li><li>工作模式可选： <ul class="lv2"> <li></li><li>省电模式 (PSM) (RT6278A) </li><li>强制PWM模式 (RT6278B) </li></ul> </li><li>固定开关工作频率：500kHz </li><li>内建固定软起动时间 (典型值为0.4ms) </li><li>输入欠压锁定保护 (UVLO) </li><li>打嗝模式的输出欠压保护 </li><li>可自动恢复的输出过压保护 </li><li>RT6278A具有超声工作模式 (USM) </li><li>采用晶核倒装的UQFN-12HL 3x3 (FC) 封装 </li></ul></div>
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<div class="spec-list"><ul class="lv1"><li>工商业低功率系统 </li><li>计算机外部设备 </li><li>液晶显示器和电视机 </li><li>节能电器 </li><li>高性能 DSP、FPGA 和 ASIC 负载点调节器 </li><li>网络通信设备 </li></ul></div>
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