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RT8205A/B/C 是一款双通道开关模式降压控制器，用于电池供电系统中为逻辑电路部分提供电源供应。它包含了两组输出电压可是恒定的 5V/3.3V 或在 2V~5.5V 之间调节的 PWM 控制器。一个替代 LGATE1 的输出 LG1_CP 可以用于外部电荷泵电路（RT8205B ），可选的外部电荷泵电路可用 SECFB 端子进行监测。两组恒定电压（5V/3.3V）的线性稳压器也包含其中，每个线性稳压器可以提供 70mA 输出电流，并可自动切换到 PWM 控制器的输出以提高效率。RT8205A/B/C 包含内置的上电时序管理能力、电源正常状态输出和内置软起动电路，还有内置输出软放电功能可以避免关机期间的负电压问题。它所使用的恒定导通时间（ COT ）模式下的 PWM 控制逻辑无需使用电流检测电阻，在负载发生瞬态变化时具有 100ns 的响应速度，同时还能维持基本恒定的开关切换工作频率。独特的超声模式将开关切换工作频率维持在 25kHz 以上，为音频应用消除了噪声。此外，它还具有二极管仿真模式（ DEM ），这使它在轻负载条件下的效率能够最大化，而恒定频率的 PWM 模式则可降低敏感应用中的射频干扰。
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<li class="mv5">宽输入电压范围：6V~25V</li><li class="mv5">两路恒定 5V/3.3V 或 2V~5.5V 可调输出，精度1.5%</li><li class="mv5">LGATE1 替代输出（LG1_CP ）代替时钟信号用于电荷泵电路（ RT8205B ）</li><li class="mv5">二次回馈输入维持电荷泵输出电压（ RT8205C ）</li><li class="mv5">5V/3.3V 恒定输出线性稳压器输出能力为 70mA</li><li class="mv5">2V 参考电压精度为 ±1%，负载能力为 50μA</li><li class="mv5">COT 控制架构，赋予其 100ns 快速负载瞬态响应能力</li><li class="mv5">由 TONSEL 端子状态进行工作频率选择</li><li class="mv5">经 R<sub>DS(ON)</sub> 进行电流检测，可程序设计电流限制及使能信号共享一个端子</li><li class="mv5">PWM、DEM 或超声模式可选</li><li class="mv5">内置带电流限制的软起动和软放电功能</li><li class="mv5">高达 97% 的效率</li><li class="mv5">5mW 静态功率消耗</li><li class="mv5">热关机保护</li><li class="mv5">符合 RoHS 规范，不含卤素</li>
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<li class="mv5">Notebook and Sub-Notebook Computers </li><li class="mv5">3-Cell and 4-Cell Li+ Battery-Powered Devices</li>
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