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同步降压型DC-DC变换器提供两个通道独立输出2.7V~5.5V的输入电压CXSD62273开关频率高达2.25MHz双通道1A负载电流
发表时间：2020-05-13
浏览次数：76

目录

1.产品概述       2.产品特点     wXh嘉泰姆

3.应用范围       4.技术规格书下载（PDF文档）wXh嘉泰姆

5.产品封装       6.电路原理图  wXh嘉泰姆

7.相关产品wXh嘉泰姆

   产品概述 返回TOPwXh嘉泰姆

     CXSD62273是一款同步降压型DC-DC变换器，它可以提供两个通道独立输出。2.7V~5.5V的输入电压范围使得CXSD62273适用于智能手机，PDA以及其他便携设备应用。CXSD62273开关频率高达2.25MHz，允许使用小型化电感与电容。典型情况下每个通道支持高达1A输出电流。片内集成的同步开关提高了转换效率，不需要外部肖特基二极管。用户可选择强制PWM或者PFM/PWM模式工作：强制PWM模式提供极低的输出电压纹波，而PFM模式用于在轻负载时提高效率。CXSD62273内部软启动电路避免了浪涌电流。关断时，内部电阻可以对输出放电。The CXSD62273 is synchronous dual step-down DC-DC converters optimized for battery powered portable applications. It provides two independent output voltage rails powered by 1-cell Li-Ion or 3-cell NiMH/NiCD batteries. The device is also suitable to operate from a standard 3.3V or 5V voltage rail. With an input voltage range of 2.7V to 5.5V, the CXSD62273 is ideal to power portable applications like smart phones, PDAs and other portable equipment. The CXSD62273operates at 2.25MHz fixed switching frequency allowing the use of small inductors and capacitors to achieve a small solution size. Each output supports up to 1A load current, typical. The internal synchronous switch increases efficiency and eliminates the need for an external schottky diode. The CXSD62273has a user selectable mode of forced PWM and PFM/PWM mode. The forced PWM mode operation provides the lowest ripple noise and the PFM mode operation provides high efficiency at light loads. The CXSD62273has internal soft start and avoids inrush current during startup. When shutdown, internal resistor discharges the output capacitor.

   产品特点 返回TOPwXh嘉泰姆

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• 效率高达95%wXh嘉泰姆

• 2.25MHz开关频率wXh嘉泰姆

• 双通道1A负载电流wXh嘉泰姆

• 45μA静态电流wXh嘉泰姆

• 2.7V to 5.5V 输入电压范围wXh嘉泰姆

• 双通道180度反相工作wXh嘉泰姆

• 可调输出电压低至0.6VwXh嘉泰姆

• 无需肖特基二极管wXh嘉泰姆

• 短路保护和过温保护wXh嘉泰姆

• 电源好指示输出wXh嘉泰姆

• 内部软启动wXh嘉泰姆

• 3mm x 3mm TDFN-10封装wXh嘉泰姆

• 符合RoHS规范、Lead(Pb)-Free、Halogen-FreewXh嘉泰姆

 High Efficiency Up to 95%wXh嘉泰姆

 2.25MHz Constant Switching FrequencywXh嘉泰姆

 Dual 1A Available Load CurrentwXh嘉泰姆

 45μATypical Quiescent CurrentwXh嘉泰姆

 2.7V to 5.5V Input Voltage RangewXh嘉泰姆

 2 Channel 180 Degree Out of Phase OperationwXh嘉泰姆

 Adjustable Output Voltage as Low as 0.6VwXh嘉泰姆

 No Schottky Diode RequiredwXh嘉泰姆

 Short Circuit and Thermal ProtectionwXh嘉泰姆

 Power Good OutputwXh嘉泰姆

 Internal Soft Start FunctionwXh嘉泰姆

 Available in 3mm′3mm TDFN-10 PackagewXh嘉泰姆

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

Halogen-FreewXh嘉泰姆

   应用范围 返回TOPwXh嘉泰姆

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• SSD模块wXh嘉泰姆

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 SSD ModulewXh嘉泰姆

 Smart PhoneswXh嘉泰姆

 Tablet PCwXh嘉泰姆

 Portable Media PlayerswXh嘉泰姆

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 Plug-in DC/DC Modules for Routers andwXh嘉泰姆

SwitcherswXh嘉泰姆

   技术规格书（产品PDF) 返回TOP wXh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！wXh嘉泰姆

 QQ截图20160419174301.jpgwXh嘉泰姆

产品封装图 返回TOPwXh嘉泰姆

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电路原理图 返回TOPwXh嘉泰姆

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