适用于系统负载频繁变化之电源开关芯片Current Limited Load Switch CXES4291是针对系统负载频繁变化情况而设计的一款电源开关芯片。当过载发生时，CXES4291将输出电流调整到用户设定的值以防止负载损坏。在不同的应用环境下，可通过调节SET端的电阻值来控制限流电流的大小，最大限流电流不超过1.5A

   产品概述 返回TOPtBx嘉泰姆

    CXES4291是针对系统负载频繁变化情况而设计的一款电源开关芯片。当过载发生时，CXES4291将输出电流调整到用户设定的值以防止负载损坏。在不同的应用环境下，可通过调节SET端的电阻值来控制限流电流的大小，最大限流电流不超过1.5A。CXES4291的静态电流低至9μA，在关断模式下，芯片的静态电流小于1μA。另外，CXES4291还具有过温保护关断和欠压保护关断功能。The CXES4291 is a Current Limited P-channel MOSFET power switch designed for high-side load-switching applications. An integrated current-limiting circuit protects the input supply against large currents which may cause the supply to fall out of regulation. It can be used to control loads that require up to 1A. In order to fit different application, current limit threshold is programmed with a resistor from SET Pin to ground. The quiescent supply current is typically a low 8μA, making the device ideal for portable battery-operated equipment. In shutdown mode, the supply current decreases to less than 0.1μA. Additional features include thermal shutdown to prevent catastrophic switch failure from high current loads, under-voltage lockout (UVLO) to ensure that the device remains off unless there is a valid input voltage present. The CXES4291 is available in a 5 pin SOT-23 package.

   产品特点 返回TOPtBx嘉泰姆

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• 输入电压范围2.4V to 5.5VtBx嘉泰姆

• 可调节的限流电流阈值</p>

• 9μA 静态电流</p>

• 150 mΩ 导通电阻</p>

• 欠压保护功能tBx嘉泰姆

• 过温保护功能tBx嘉泰姆

• 工作温度范围(-40℃ to 85℃)tBx嘉泰姆

• 采用5-pin SOT23封装tBx嘉泰姆

• 符合RoHS规范及Pb-FreetBx嘉泰姆

2.4V to 5.5V Input voltage rangetBx嘉泰姆

Programmable over current thresholdtBx嘉泰姆

Fast transient response:tBx嘉泰姆

Low quiescent currenttBx嘉泰姆

- 8μA typicaltBx嘉泰姆

- 1μA max with shutdowntBx嘉泰姆

135m typical RDS(ON)tBx嘉泰姆

Only 1.8V needed for ON/OFF ControltBx嘉泰姆

Under-Voltage LockouttBx嘉泰姆

Thermal shutdowntBx嘉泰姆

Temp range -40 to 85°CtBx嘉泰姆

Available in SOT23-5 packagetBx嘉泰姆

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

   应用范围 返回TOPtBx嘉泰姆

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• 热插拔开关</p>

• 外围端口tBx嘉泰姆

• 笔记本电脑</p>

• 桌上型电脑</p>

• 数码相机，数码摄像机和掌上电脑</p>

Peripheral portstBx嘉泰姆

Notebook computerstBx嘉泰姆

Personal communication devicestBx嘉泰姆

Hot swap suppliestBx嘉泰姆

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