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RT6276A/B是简单易用的6A同步Buck转换器，输入电压范围为4.5V~23V，内部集成高精度0.6V参考电压源和低R<SUB>DS(ON)</SUB>功率开关，使用晶核倒装的UQFN-12HL 3x3封装，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，外围元件少，在各种运作条件下都具有几乎不变的开关切换工作频率，具有很高的输出电压调节精度。RT6276A在轻载时自动进入PSM模式以维持高转换效率，RT6276B采用强制PWM工作模式以满足严格的电压调节精度要求。它对上、下桥的电流都进行检测以获得强健的过流保护性能，逐周期过流保护可最大程度地避免输出短路、过流和电感饱和等现象带来灾难性的后果，内建的软启动功能可避免启动期间出现大的浪涌电流。它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。RT6276A/B采用UQFN-12HL 3x3 (FC) 封装。
/content/dam/richtek-eds/resources/product-specifications/rt62/rt6276a/rt6276b/images/circuit/92344brimu.GIF
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<li class="mv5">6A转换器，内置30mΩ/15mΩ R<SUB>DS(ON)</SUB>功率开关</li><li class="mv5">输入电压范围：4.5V~23V</li><li class="mv5">输出电压范围：0.6V~6V</li><li class="mv5">改进型固定导通时间 (ACOT<sup>®</sup>) 控制架构<br>►超快速瞬态响应<br>►无需外部补偿<br>►针对低ESR陶瓷输出电容进行了优化</li><li class="mv5">反馈参考电压为0.6V±1%</li><li class="mv5">工作模式可选：<br>►PSM省电模式 (RT6276A)<br>►强制PWM模式 (RT6276B)</li><li class="mv5">固定开关工作频率：500kHz</li><li class="mv5">内建固定软起动时间 (典型值为0.4ms)</li><li class="mv5">输入欠压锁定保护 (UVLO)</li><li class="mv5">打嗝模式的输出欠压保护</li><li class="mv5">可自动恢复的输出过压保护</li><li class="mv5">RT6276A具有超声工作模式 (USM)</li><li class="mv5">采用晶核倒装的UQFN-12HL 3x3 (FC) 封装</li>
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<li class="mv5"> 工商业低功率系统</li><li class="mv5"> 计算机外部设备</li><li class="mv5"> 液晶显示器和电视机</li><li class="mv5"> 节能电器</li><li class="mv5"> 高性能 DSP、FPGA 和 ASIC 负载点调节器</li><li class="mv5">网络通信设备</li>
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