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1MHz固定频率同步电流模降压型DC变换器CXSD62287高达3A的负载电流135mΩ主开关和90mΩ同步整流开关输入电压4.5V至28V
发表时间：2020-05-14
浏览次数：320

目录

1.产品概述       2.产品特点     8y6嘉泰姆

3.应用范围       4.技术规格书下载（PDF文档）8y6嘉泰姆

5.产品封装       6.电路原理图  8y6嘉泰姆

7.相关产品8y6嘉泰姆

   产品概述 返回TOP8y6嘉泰姆

   CXSD62287A是一款1MHz固定频率同步电流模降压型DC-DC变换器。芯片集成了135mΩ主开关和90mΩ同步整流开关，在4.5V～28V的输入范围内能够提供高达3A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。在重负载时，CXSD62287A工作于固定频率脉冲宽度调制模式（PWM）以获得优异的稳定性和瞬态回应。在轻负载时，CXSD62287A会自动工作于脉冲跳跃模式以节省功耗。CXSD62287A具有短路和过温等保护机制，以确保芯片工作的安全性。可编程的软启动有效减小了输入浪涌电流和启动时的输出过冲。芯片在关断模式下的静态电流可低至1μA以下。CXSD62287A采用带有裸露底盘的SOP-8封装。The CXSD62287A is a 1MHz fixed frequency synchronous current mode buck regulator. The device integrates both 135mΩ high-side switch and 90mΩ low-side switch that provide 3A of continuous load current over a wide operating input voltage of 4.5V to 28V.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. At heavy load, the CXSD62287A operates at a fixed frequency Pulse-Width Modulation mode for excellent stability and transient response. At light load, the CXSD62287A will operates at a PulseSkipping mode to save power. The CXSD62287A features short circuit and thermal protection circuits to increase system reliability. Externally programmable soft-start allows for proper power on sequencing with respect to other power supllies and avoids input inrush current during startup. In shutdown mode, the supply current drops below 1μA. The CXSD62287A is available in SOP-8 package with the exposed pad.

   产品特点 返回TOP8y6嘉泰姆

 8y6嘉泰姆

• 轻负载自动脉冲跳跃模式8y6嘉泰姆

• 高达3A的输出电流8y6嘉泰姆

• 110ns最小TON时间8y6嘉泰姆

• 集成的135mΩ主开关8y6嘉泰姆

• 集成的90mΩ同步整流开关8y6嘉泰姆

• 输入电压范围：4.5V至28V8y6嘉泰姆

• 输出电压可调范围：0.8V至24V8y6嘉泰姆

• 效率高达95%8y6嘉泰姆

• 可编程的软启动8y6嘉泰姆

• 关断电流小于1μA8y6嘉泰姆

• 1MHz固定开关频率8y6嘉泰姆

• 过温保护和过流保护8y6嘉泰姆

• 输入欠压保护8y6嘉泰姆

• SOP-8(EP)封装8y6嘉泰姆

• 符合RoHS规范及Pb-Free8y6嘉泰姆

 技术规格书（产品PDF) 返回TOP 8y6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！8y6嘉泰姆

 QQ截图20160419174301.jpg8y6嘉泰姆

产品封装图 返回TOP8y6嘉泰姆

a8y6嘉泰姆

电路原理图 返回TOP8y6嘉泰姆

 8y6嘉泰姆

 8y6嘉泰姆

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20008y6嘉泰姆

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0.92~208y6嘉泰姆

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0.928y6嘉泰姆

3408y6嘉泰姆

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40008y6嘉泰姆

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0.6~128y6嘉泰姆

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10008y6嘉泰姆

0.68y6嘉泰姆

1508y6嘉泰姆

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0.6~208y6嘉泰姆

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0.68y6嘉泰姆

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0.6~128y6嘉泰姆

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0.68y6嘉泰姆

80~8008y6嘉泰姆

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0.68y6嘉泰姆

15008y6嘉泰姆

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0.88y6嘉泰姆

10008y6嘉泰姆

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0.8088y6嘉泰姆

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