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RT8202/A/B 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。RT8202/A/B 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。其 Buck 架构容许将很高的电池电压直接转换为系统需要的电压也对效率提升做出了贡献。RT8202/A/B 可为 CPU 内核、晶片组、DRAM 和其它低压系统提供低达 0.75V 的电源,其封装因具体型号而不同。RT8202 的封装是 WQFN-16L 4x4 , RT8202A 是 WQFN-16L 3x3 ,而 RT8202B 则采用了 WQFN-14L 3.5x3.5 的封装。
RT8202/RT8202A/RT8202B 电路图
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<div class="spec-list"><ul class="lv1"><li>转换效率超高 </li><li>采用下桥 R<sub>DS(ON)</sub> 电流无损耗检测技术或高精度的电阻电流检测技术,电流限制阈值可用电阻进行设定 </li><li>100ns 快速步阶负载响应 </li><li>V<sub>OUT</sub> 电压精度在全输入/负载范围内达到1% </li><li>可调输出电压范围: 0.75V~3.3V </li><li>电阻可程式设计工作频率 </li><li>过压/欠压保护 </li><li>软启动期间有两级电流限制 </li><li>具备驱动大功率同步整流器的能力 </li><li>有电源准备好信号输出 </li><li>符合 RoHS 规范,不含卤素 </li></ul></div>
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RT8202/RT8202A/RT8202B 订购信息
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<div class="spec-list"><ul class="lv1"><li>Notebook Computers </li><li>CPU Core Supply </li><li>Chipset/RAM Supply as Low as 0.75V </li></ul></div>
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