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RT7272B 是一款高效率、电流模式同步降压 DC-DC 转换器，可在 4.5V 至 36V 的宽输入电压范围内提供高达 3A 的输出电流。RT7272B 集成了导通电阻为 150mΩ 的高侧 MOSFET 与导通电阻为 80mΩ 的低侧 MOSFET，可实现高达 95% 的高转换效率。电流模式控制架构支持快速瞬态响应与简单补偿电路。<br />逐周期电流限制功能可提供短路输出保护，内部软启动可消除启动期间的输入电流浪涌。RT7272B 提供完整的保护功能，例如输入欠压锁定、输出欠压保护、过电流保护与过温保护。<br />RT7272B 采用散热增强型 SOP-8 (Exposed Pad) 封装。
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<li class="mv5"> 4.5V to 36V Input Voltage Range<br /> </li><li class="mv5"> 3A Output Current<br /> </li><li class="mv5"> Internal N-MOSFETs<br /> </li><li class="mv5"> Current Mode Control<br /> </li><li class="mv5"> Fixed Switching Frequency Operation: 500kHz <br /> </li><li class="mv5"> Adjustable Output Voltage from 0.8V to 30V<br /> </li><li class="mv5"> High Efficiency Up to 95%<br /> </li><li class="mv5"> Stable with Low ESR Ceramic Output Capacitors<br /> </li><li class="mv5"> Cycle-by-Cycle Current Limit<br /> </li><li class="mv5"> Input Undervoltage Lockout<br /> </li><li class="mv5"> Output Undervoltage Protection<br /> </li><li class="mv5"> Over-Temperature Protection<br /> </li><li class="mv5"> Adjustable Current Limit<br /> </li><li class="mv5"> Power Saving Mode for High Efficiency at Light Load</li>
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<li class="mv5"> Distributed Power Systems<br /> </li><li class="mv5"> Pre-Regulator for Linear Regulators<br /> </li><li class="mv5"> Notebook Computers<br /> </li><li class="mv5"> Point of Load Regulator in Distributed Power System<br /> </li><li class="mv5"> Digital Set-Top Boxes<br /> </li><li class="mv5"> Personal Digital Recorders<br /> </li><li class="mv5"> Broadband Communications<br /> </li><li class="mv5"> Flat Panel TVs and Monitors<br /> </li><li class="mv5"> Vehicle Electronics</li>
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