目录

1.产品概述       2.产品特点     bCQ嘉泰姆

3.应用范围       4.技术规格书下载（PDF文档）bCQ嘉泰姆

5.产品封装       6.电路原理图  bCQ嘉泰姆

7.相关产品bCQ嘉泰姆

   产品概述 返回TOPbCQ嘉泰姆

      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TOPbCQ嘉泰姆

•1.4V到5.5V的输入电压范围bCQ嘉泰姆

•低导通电阻bCQ嘉泰姆

•低关断电流：<2uAbCQ嘉泰姆

•开/关控制bCQ嘉泰姆

•高速自动放电bCQ嘉泰姆

•可编程输出电流软启动bCQ嘉泰姆

•输出电流限制bCQ嘉泰姆

•掉电零反向电流bCQ嘉泰姆

•过温关断bCQ嘉泰姆

•2mm×2mm TDFN-6和0.9mm×1.4mm WCSP-6封装bCQ嘉泰姆

•符合RoHS规范及Pb-FreebCQ嘉泰姆

1.4V to 5.5V Input Voltage RangebCQ嘉泰姆

Low On ResistancebCQ嘉泰姆

- rON = 55m
at VIN = 5VbCQ嘉泰姆

- rON = 60m
at VIN = 3.6VbCQ嘉泰姆

- rON = 80m
at VIN = 1.8VbCQ嘉泰姆

- rON = 90m
at VIN = 1.5VbCQ嘉泰姆

2A Maximum Continuous Switch CurrentbCQ嘉泰姆

Low Shutdown Current:<2μAbCQ嘉泰姆

ON/OFF ControlbCQ嘉泰姆

High Speed Auto DischargebCQ嘉泰姆

Programmable Soft-startbCQ嘉泰姆

Output Current LimitbCQ嘉泰姆

No Reverse Current when Power OffbCQ嘉泰姆

Thermal ShutdownbCQ嘉泰姆

Available in 2mm×2mm TDFN-6 ,bCQ嘉泰姆

and SOT23-5 PackagesbCQ嘉泰姆

RoHS Compliant and 100% Lead (Fb)-FreebCQ嘉泰姆

Halogen-FreebCQ嘉泰姆

   应用范围 返回TOPbCQ嘉泰姆

‧机顶盒bCQ嘉泰姆

‧超级本bCQ嘉泰姆

‧平板电脑bCQ嘉泰姆

‧便携式电子设备bCQ嘉泰姆

‧智能手机bCQ嘉泰姆

‧无线手机bCQ嘉泰姆

Set-top BoxesbCQ嘉泰姆

UltrabookbCQ嘉泰姆

Tablet PCbCQ嘉泰姆

Portable Electronics DevicesbCQ嘉泰姆

Point of Sales TerminalsbCQ嘉泰姆

SmartphonesbCQ嘉泰姆

Wireless HandsetsbCQ嘉泰姆

   技术规格书（产品PDF) 返回TOP bCQ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！bCQ嘉泰姆

 bCQ嘉泰姆

产品封装图 返回TOPbCQ嘉泰姆

abCQ嘉泰姆

电路原理图 返回TOPbCQ嘉泰姆

 bCQ嘉泰姆

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