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将输出电流调整到用户设定的值以防止负载损坏通过调节SET端的电阻值来控制限流电流的大小限流电流不超过1.5A

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
输入电压范围2.4V to 5.5V
• 可调节的限流电流阈值
• 9μA 静态电流
• 150 mΩ 导通电阻
• 欠压保护功能
• 过温保护功能

目录

1.产品概述       2.产品特点     

3.应用范围       4.技术规格书下载（PDF文档）

5.产品封装       6.电路原理图  

7.相关产品

   产品概述 返回TOP

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    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TOP

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• 输入电压范围2.4V to 5.5V

• 可调节的限流电流阈值

• 9μA 静态电流

• 150 mΩ 导通电阻

• 欠压保护功能

• 过温保护功能

• 工作温度范围(-40℃ to 85℃)

• 采用5-pin SOT23封装

• 符合RoHS规范及Pb-Free

2.4V to 5.5V Input voltage range

Programmable over current threshold

Fast transient response:

Low quiescent current

- 8μA typical

- 1μA max with shutdown

135m typical RDS(ON)

Only 1.8V needed for ON/OFF Control

Under-Voltage Lockout

Thermal shutdown

Temp range -40 to 85°C

Available in SOT23-5 package

RoHS Compliant and 100% Lead(Pb)-Free

   应用范围 返回TOP

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• 热插拔开关

• 外围端口

• 笔记本电脑

• 桌上型电脑

• 数码相机，数码摄像机和掌上电脑

Peripheral ports

Notebook computers

Personal communication devices

Hot swap supplies

   技术规格书（产品PDF) 返回TOP 

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产品封装图 返回TOP

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电路原理图 返回TOP

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功率开关   > 负载开关
Part   Number	remark	Channel	Vin (V)	RDS(ON)	ILMT	Enable	Fault Flag	IQ (A)	Package
CXES4290	1.5A Line Switch with Low On-Resistance	1	1.4~5.5	80mΩ	2A	Active High	No	70μA	TDFN-6,WCSP-6
CXES4291	current Limited High Side Load Switch	1	2.4 ~ 5.5	150mΩ	1.5A	Active Low	Yes	9μ	SOT23-5
CXES4292	1 Amp Current Limited Load Switch	1	2.4 ~ 5.5	150mΩ	1.5A	Active Low	Yes	9μ	SOT23-5
CXES4293	1.5A Line Switch with Low On-Resistance	1	2.5~5.5	100mΩ	2A	Active High	No	70μA	SOT23-5
CXES4294	Dual 1.5A Line Switch with Low On-Resistance	2	2.5~5.5	100mΩ	2A	Active High	No	70μA	TDFN-10
CXES4295	1.8A Line Switch with Low On-Resistance	1	3.3~13.5	100mΩ	2.35A	Active High	No	120μA	SOT23-5