CXES4290低漏失的线性开关有开/关控制输出电流软启动和输出限流的功能.应用时降压DC/DC的输出端使能引脚控制每路开/关以最大效率来传递电压电流限制保护电路外部可编程的软启动功能来设置上电时序避免启动阶段的输入电流过冲

CXES4290是一低漏失的线性开关，具有开/关控制、输出电流软启动和输出限流的功能.应用时，将CXES4290连接至降压DC/DC的输出端，使能引脚控制每路开/关以最大效率来传递电压。因此，CXES4290能延长电池的寿命和工作时间。CXES4290的功能包括了电流限制保护电路，不需要在芯片外部增加额外的电阻和MOSFET来实现此功能。可以利用外部可编程的软启动功能来设置上电时序，以避免启动阶段的输入电流过冲。当EN引脚接低电压时，IC进入关断模式。此时，即使芯片的输出端连接容性负载，电容负载上存储的电荷也会被内部的放电开关快速放电至地，从而输出VOUT的电压也会快速下降到地。CXES4290还包括了过流和过热保护功能。CXES4290具有反向电流保护功能，当输入断电后会阻值任何电流通过功率管反向流到输入端

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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      CXES4290是一低漏失的线性开关，具有开/关控制、输出电流软启动和输出限流的功能.应用时，将CXES4290连接至降压DC/DC的输出端，使能引脚控制每路开/关以最大效率来传递电压。因此，CXES4290能延长电池的寿命和工作时间。CXES4290的功能包括了电流限制保护电路，不需要在芯片外部增加额外的电阻和MOSFET来实现此功能。可以利用外部可编程的软启动功能来设置上电时序，以避免启动阶段的输入电流过冲。当EN引脚接低电压时，IC进入关断模式。此时，即使芯片的输出端连接容性负载，电容负载上存储的电荷也会被内部的放电开关快速放电至地，从而输出VOUT的电压也会快速下降到地。CXES4290还包括了过流和过热保护功能。CXES4290具有反向电流保护功能，当输入断电后会阻值任何电流通过功率管反向流到输入端。The CXES4290 is a low dropout line switch IC with ON/OFF control, output soft-start and output current protection which integrates a P-channel MOSFET. By connecting the CXES4290 to the output pin of a step-down DC/DC converter, the EN pin controls ON/OFF for each distribution switch to deliver power per requirements and maximize total power efficiency. As a result, the CXES4290 helps to extend battery life and product operation time. The CXES4290 contains a current limit and protection circuit, so the external MOSFETs and resistors are not required unlike discrete circuit solutions. Externally programmable soft-start allows for proper power on sequencing with respect to other power supplies and avoids input inrush current during startup. When a low signal is input to the EN pin, the IC enters shutdown mode. Even where a load capacitor is connected to the output pin during shutdown, the electric charge stored at the load capacitor is discharged through the internal switch. As a result, the VOUT pin voltage falls quickly to the GND level. The CXES4290 contains over current protection. The CXES4290 eliminates any reversed current flow across the switch when it is powered off.

   产品特点 返回TOP

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•1.4V到5.5V的输入电压范围

•低导通电阻

•低关断电流：<2uA

•开/关控制

•高速自动放电

•可编程输出电流软启动

•输出电流限制

•掉电零反向电流

•过温关断

•2mm×2mm TDFN-6和0.9mm×1.4mm WCSP-6封装

•符合RoHS规范及Pb-Free

1.4V to 5.5V Input Voltage Range

Low On Resistance

- rON = 55m
at VIN = 5V

- rON = 60m
at VIN = 3.6V

- rON = 80m
at VIN = 1.8V

- rON = 90m
at VIN = 1.5V

2A Maximum Continuous Switch Current

Low Shutdown Current:<2μA

ON/OFF Control

High Speed Auto Discharge

Programmable Soft-start

Output Current Limit

No Reverse Current when Power Off

Thermal Shutdown

Available in 2mm×2mm TDFN-6 ,

and SOT23-5 Packages

RoHS Compliant and 100% Lead (Fb)-Free

Halogen-Free

   应用范围 返回TOP

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‧机顶盒

‧超级本

‧平板电脑

‧便携式电子设备

‧智能手机

‧无线手机

Set-top Boxes

Ultrabook

Tablet PC

Portable Electronics Devices

Point of Sales Terminals

Smartphones

Wireless Handsets

   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