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RT8249D 是双通道 Buck 控制器，用于为电池供电的系统生成稳定的电压。其中包含两组输出电压 2V~5.5V 可调的 PWM 控制器和两组固定 5V/3.3V 输出的线性稳压器，每组线性稳压器可输出最大 100mA 的电流，3.3V 线性稳压器在输出电流低于 35mA 时的稳压精度可达 1%。RT8249D 则提供了一个模式选择引脚 SKIPSEL 用于选择二极管仿真模式（DEM）或音频避开模式（ASM）。它们具有集成化的上电时序控制功能、Power Good 输出、内部软起动功能和防止关机以后出现负压的输出软放电功能。</br>由于采用固定电流涟波的 PWM 控制技术，它在工作时无需使用电流检测电阻，对付再瞬变具有 100ns 的响应速度。为了获得最高的转换效率，RT8249D 在轻载条件下自动进入二极管仿真模式工作。其封装为 WQFN-20L 3x3。
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<li class="mv5"> 支持超级本的连接待机模式</li><li class="mv5"> CCRCOT 控制架构，具有 100ns 负载响应能力</li><li class="mv5"> PWM 最大责任周期 > 98%</li><li class="mv5"> 5V~25V 的输入电压范围</li><li class="mv5">双通道可调节输出:<br>►CH1 : 2V~5.5V<br>►CH2 : 2V~4V</li><li class="mv5"> 5V/3.3V LDO 具有 100mA 输出能力</li><li class="mv5"> 3.3V LDO 输出精度达1%</li><li class="mv5"> 振荡器输出可供电荷泵电路使用</li><li class="mv5"> 内部频率设定：<br>► 500kHz/600kHz (CH1/CH2)</li><li class="mv5"> 内部软启动和软放电</li><li class="mv5"> 4700ppm/°C R<sub>DS(ON)</sub> 电流检测</li><li class="mv5"> 独立控制器使能控制</li><li class="mv5"> 内建 OVP/UVP/OCP/OTP</li><li class="mv5"> 非锁定的 UVLO</li><li class="mv5"> Power Good 指示</li><li class="mv5"> 20引脚 WQFN 封装</li><li class="mv5"> 符合 RoHS 规范，不含卤素</li>
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<li class="mv5"> 笔记本电脑</li><li class="mv5"> 系统电源</li><li class="mv5"> 3~4芯锂离子电池供电设备</li>
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