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RT8126A/B/C 是用于笔记型电脑中将电池高电压转换为低压 CPU 内核、I/O 和记忆体晶片所使用的电源的 PWM 控制器，其转化效率高，输出电压精度高，具有卓越的瞬态回应特性。它所采用的固定导通时间 PWM 控制架构赋予其在维持相对固定的工作频率情况下在宽阔的输入/输出电压比下自由运作的能力，并且能在负载发生瞬态变化时具有 100ns 的即时回应能力。RT8126A/B/C 抛弃了传统电流模式 PWM 控制器中使用电阻进行电流检测的方式，降低了成本，提高了效率。由于具备驱动大功率同步整流 MOSFET 的能力，其效率也得到了改善。为了消除音讯应用中的音讯杂讯，RT8126B 提供了音讯避开模式，它可将开关工作频率维持在 25kHz 以上。RT8126A/B/C 的最低输出电压为 0.6V。
RT8126A/RT8126B/RT8126C 电路图
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<div class="spec-list"><ul class="lv1"><li>VCC 工作电压范围：4.5V~13.2V </li><li>VOUT 电压范围：0.6V~5V </li><li>功率级输入电压范围：2.5V~24V </li><li>关机电流 <10μA </li><li>300kHz 固定工作频率 </li><li>支援二极体模拟模式（RT8126A） </li><li>支援音讯避开模式（RT8126B） </li><li>VIN 检测 </li><li>LGATE 过流设定（LGOCS） </li><li>Power Good 指示 </li><li>内嵌自举开关 </li><li>下桥电流检测用于电流限制 </li><li>1% 精度 V<sub>REF</sub>=0.6V </li><li>使能控制 </li><li>查分输出检测 </li><li>OVP/UVP/OTP/Pre-OVP/OCP </li></ul></div>
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RT8126A/RT8126B/RT8126C 订购信息
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<div class="spec-list"><ul class="lv1"><li>晶片组/RAM 电源 </li><li>通用大功率 DC/DC 调节器 </li></ul></div>
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