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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：331

目录

1.产品概述       2.产品特点     pdZ嘉泰姆

3.应用范围       4.技术规格书下载（PDF文档）pdZ嘉泰姆

5.产品封装       6.电路原理图  pdZ嘉泰姆

7.相关产品pdZ嘉泰姆

   产品概述 返回TOPpdZ嘉泰姆

       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.

   产品特点 返回TOPpdZ嘉泰姆

 pdZ嘉泰姆

• 高达4A的输出电流pdZ嘉泰姆

• 100ns最小导通时间pdZ嘉泰姆

• 集成的110mΩ主开关pdZ嘉泰姆

• 集成的30mΩ同步整流开关pdZ嘉泰姆

• 输入电压范围：4.5V至21VpdZ嘉泰姆

• 0.8V以上可调输出电压pdZ嘉泰姆

• 固定500KHz开关频率pdZ嘉泰姆

• 可同步300KHz到2MHz外部时钟pdZ嘉泰姆

• 芯片内部频率补偿pdZ嘉泰姆

• 芯片内部软启动pdZ嘉泰姆

• 关断电流小于1μApdZ嘉泰姆

• 过温保护和过流保护pdZ嘉泰姆

• 输入欠压保护pdZ嘉泰姆

• SOP-8(EP)封装pdZ嘉泰姆

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 4A Continuous Output CurrentpdZ嘉泰姆

 100ns Minimum On TimepdZ嘉泰姆

 Integrated 110m High-side SwitchpdZ嘉泰姆

 Integrated 30m Low-side SwitchpdZ嘉泰姆

 Wide 4.5V to 21V Operating Input RangepdZ嘉泰姆

 Output Adjustable from 0.8VpdZ嘉泰姆

 Fixed 500KHz Switching FrequencypdZ嘉泰姆

 Sync from 300KHz to 2MHz External ClockpdZ嘉泰姆

 Internal CompensationpdZ嘉泰姆

 Internal Soft-StartpdZ嘉泰姆

<1μA Shutdown CurrentpdZ嘉泰姆

 Thermal Shutdown and Over current ProtectionpdZ嘉泰姆

 Input Under Voltage LockoutpdZ嘉泰姆

 Available in SOP-8 (EP) PackagepdZ嘉泰姆

 RoHS Compliant and 100% Lead(Pb)-FreepdZ嘉泰姆

Halogen-FreepdZ嘉泰姆

   应用范围 返回TOPpdZ嘉泰姆

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   技术规格书（产品PDF) 返回TOP pdZ嘉泰姆

     需要详细的PDF规格书请扫一扫微信联系我们，还可以获得免费样品以及技术支持！pdZ嘉泰姆

 QQ截图20160419174301.jpgpdZ嘉泰姆

产品封装图 返回TOPpdZ嘉泰姆

apdZ嘉泰姆

电路原理图 返回TOPpdZ嘉泰姆

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相关芯片选择指南 返回TOP                  更多同类产品......

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800pdZ嘉泰姆

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