4A的负载电流500KHz固定频率同步电流模降压型DC-DC变换器CXSD62291内部频率补偿软启动同步整流开关
发表时间:2020-05-15
浏览次数:310

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       CXSD62291是一款500KHz固定频率同步电流模降压型DC-DC变换器。芯片集成了110mΩ主开关和30mΩ同步整流开关,在4.5V~21V的输入范围内能够提供高达4A的负载电流。内部集成了同步整流开关,不再需要外接肖特基二极管,提高了效率。电流模控制提供了快速的瞬态响应和周期性的峰值电流限制能力。CXSD62291具有短路和过温等保护机制,以确保芯片工作的安全性。芯片在关断模式下的静态电流可低至1μA以下。CXSD62291采用带有裸露底盘的SOP-8封装。The CXSD62291 is a 500KHz fixed frequency synchronous current mode buck regulator. The device integrates both 110mΩ high-side switch and 30mΩ low-side switch that provide 4A of continuous load current over a wide operating input voltage of 4.5V to 21V. The internal synchronous power switch increases efficiency and eliminates the need for an external Schottky diode. Current mode control provides fast transient response and cycle-by-cycle current limit. The CXSD62291 features short circuit and thermal protection circuits to increase system reliability. In shutdown mode, the supply current drops below 1μA. The CXSD62291 is available in SOP-8 package with an exposed pad.

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• 高达4A的输出电流yPT嘉泰姆

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