CXAS42283集成的双通道118mΩ电源开关用于自供电和总线供电的通用串行总线（USB）应用内置电荷泵用于驱动二极管的N沟道MOSFET以消除开关断电时的反向电流

CXAS42283有几种保护功能，包括带折叠的限流和热关机，以防止在连续重负载或短路发生时，由于增加功耗而导致灾难性开关故障。内置电荷泵用于驱动无寄生体二极管的N沟道MOSFET，以消除开关断电时的反向电流。OC是开漏输出报告过流或过温事件，具有典型的9ms脱胶超时时间。CXAS42283是一个集成的双通道118mΩ电源开关，用于自供电和总线供电的通用串行总线（USB）应用。

118mΩ高侧MOSFET
带折叠箱的450mA典型电流限制
工作范围：2.7V至5.5V
·400μS典型上升时间
“欠压锁定
·65μA静态电源电流
·1μA最大关闭电源电流
逻辑电平启用引脚，可用于高电平或低电平
·断电时无反向电流
·电流标志输出（OC）上的脱胶开路漏极

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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Several Protection features include current limiting with foldback, and thermal shutdown to prevent catastrophic switch failure caused by increasing power dissipation when continuous heavy loads or short circuit occurs. And a built-in charge pump is used to drive the N-channel MOSFET that is free of parasitic body diode to eliminate any reversed current flow across the switch when it is powered off. OC is open-drain output report over-current or over-temperature event and has typical 9ms deglitch timeout period.The CXAS42283 is an integrated dual channel 118mΩ power switch for self-powered and bus-powered Universal Serial Bus (USB) applications.

   产品特点 返回TOP

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„ 118mΩ High-Side MOSFET 

„ 450mA Typical Current Limit with Foldback 

„ Operating Range:2.7V to 5.5V 

„ 400μS Typical Rise Time 

„ Under voltage Lockout 

„ 65μA Quiescent Supply Current 

„ 1μA Maximum Shutdown Supply Current 

„ Logic Level Enable Pin, Available with Active-High or Active-Low Version 

„ No Reverse Current when Power Off 

„ Deglitched Open-Drain Over-Current Flag Output ( OC ) 

„ SOP-8 Package

   应用范围 返回TOP

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„ High-Side Power Protection Switch 

„ USB Power Management 

„ USB Host and Self-Powered Bubs 

„ USB Bus-Powered Hubs 

„ Hot Plug-In Power Supplies 

„ Battery-Charger Circuits

   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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Dual Power Switch
Part NO.	Vin(V) min.	Vin(V) max.	RON (Ohm)	VOUT rising   (μs)	Ilimit (A)	OC Flag	Discharge (Ohm)	Note	Package
CXAS42277	0.8	5.5	10	ADJ	6	N	220	3V ~ 5V Vbias  Needs	AQFN2X2-10
CXAS42278	0.8	5.5	16	ADJ	6	N	220	3V   ~ 5V Vbias Needs	TDFN2X3-14
CXAS42279	2	5.5	87	400	2	Y	200	UL,CB,A/B/C/D/ ILimit=2A/1.5A/1A/0.75A	SOP-8
CXAS42280	2.7	5.5	100	400	1	Y	N	UL,   CB	SOP-8
CXAS42281	2.7	5.5	74	1000	2	Y	N	SS	TDFN2X2-8
CXAS42282	2.7	5.5	72	400	2	Y	N	UL,CB,EOUT1/2 ILimit=2A/1A, A/B/C/D/ ILimit=2A/1.5A/1A/0.75A	TDFN3X3-10
CXAS42283	2.7	5.5	118	400	0.45	Y	N	N/A	SOP-8
CXAS42284	2.7	5.5	118	400	2	Y	N	N/A	SOP-8
CXAS42285/6	2.3	5.5	200	--	0.27	Y	N	A/B/C/D ILimit=0.27A/0.17A/0.25A/0.15A	TSOT-23-5