1.5A具有低导通阻抗的线性开关2A Line Switch with Low On-Resistance 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

   产品概述 返回TOPYKb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TOPYKb嘉泰姆

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•1.4V到5.5V的输入电压范围</p>

•低导通电阻</p>

•低关断电流：<2uAYKb嘉泰姆

•开/关控制</p>

•高速自动放电</p>

•可编程输出电流软启动YKb嘉泰姆

•输出电流限制YKb嘉泰姆

•掉电零反向电流</p>

•过温关断YKb嘉泰姆

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

•符合RoHS规范及Pb-FreeYKb嘉泰姆

1.4V to 5.5V Input Voltage RangeYKb嘉泰姆

Low On ResistanceYKb嘉泰姆

- rON = 55m
at VIN = 5VYKb嘉泰姆

- rON = 60m
at VIN = 3.6VYKb嘉泰姆

- rON = 80m
at VIN = 1.8VYKb嘉泰姆

- rON = 90m
at VIN = 1.5VYKb嘉泰姆

2A Maximum Continuous Switch CurrentYKb嘉泰姆

Low Shutdown Current:<2μAYKb嘉泰姆

ON/OFF ControlYKb嘉泰姆

High Speed Auto DischargeYKb嘉泰姆

Programmable Soft-startYKb嘉泰姆

Output Current LimitYKb嘉泰姆

No Reverse Current when Power OffYKb嘉泰姆

Thermal ShutdownYKb嘉泰姆

Available in 2mm×2mm TDFN-6 ,YKb嘉泰姆

and SOT23-5 PackagesYKb嘉泰姆

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

Halogen-FreeYKb嘉泰姆

   应用范围 返回TOPYKb嘉泰姆

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‧机顶盒</p>

‧超级本</p>

‧平板电脑YKb嘉泰姆

‧便携式电子设备</p>

‧智能手机YKb嘉泰姆

‧无线手机YKb嘉泰姆

Set-top BoxesYKb嘉泰姆

UltrabookYKb嘉泰姆

Tablet PCYKb嘉泰姆

Portable Electronics DevicesYKb嘉泰姆

Point of Sales TerminalsYKb嘉泰姆

SmartphonesYKb嘉泰姆

Wireless HandsetsYKb嘉泰姆

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