CXAS42263集成的120mΩ电源开关用于自供电和总线供电的通用串行总线USB应用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电源开关关闭时具有关机放电功能

CXAS42263是一个集成的120mΩ电源开关，用于自供电和总线供电的通用串行总线（USB）应用。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。CXAS42263在电源开关关闭时具有关机放电功能。典型的拉低电阻为75Ω。它的低静态供电电流和小封装（SOT-23-5）特别适用于PDA、手机等电池供电设备。
120mΩ高侧MOSFET
带折叠的电流限制2A
工作范围：2.7V至5.5V
·1.9ms典型VOUT开启上升时间
“欠压锁定
·65μA静态电源电流
·1μA最大备用电源电流
·高激活引脚
·断电时无反向电流
·关闭输出引脚的放电功能

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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The CXAS42263 is an integrated 120mΩ power switch for self-powered and bus-powered Universal Serial Bus (USB) applications. 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. CXAS42263 has shutdown discharge function when power switch is off. The typical pull low resistor is 75Ω. Its low quiescent supply current and small package (SOT-23-5) is particularly suitable in battery-powered equipment, like PDA, mobile phone.

   产品特点 返回TOP

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„ 120mΩ High-Side MOSFET 

„ 2A of Current Limits with Foldback 

„ Operating Range:2.7V to 5.5V 

„ 1.9ms Typical VOUT Turn-On Rise Time 

„ Under voltage Lockout 

„ 65μA Quiescent Supply Current 

„ 1μA Maximum Standby Supply Current 

„ Active-High Enable Pin 

„ No Reverse Current when Power Off 

„ Shutdown Discharge Function at OUT Pin 

„ SOT-23-5 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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     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！

 

产品封装图 返回TOP

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电路原理图 返回TOP

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Single Power Switch
Part NO.	Vin(V) min.	Vin(V) max.	RON  (Ohm)	VOUT  rising  (μs)	Ilimit  (A)	OC  Flag	Discharge (Ohm)	Note	Package
CXAS42257	1	3.6	25	140	1	N	80	RON = 56m ohm@VIN = 1.2V	WLCSP2X2-4
CXAS42258	1	3.6	78	48/220	0.5	N	88/N	RON = 146m ohm@VIN = 1.2V	WLCSP2X2-4
CXAS42259	1.5	5	25	130	3	N	250	RON   = 68m ohm@VIN = 1.5V	WLCSP2X2-4
CXAS42260	1.5	5.5	20	3300	3	N	N	RON   = 48m ohm@VIN = 1.5V	WLCSP2X3-6
CXAS42261	0.6	5.5	12	ADJ	12	N	150	HV   Vbias Needs	ADFN2X2-8
CXAS42262	2.7	5.5	120	150	2	N	75	N/A	SOT-23-5
CXAS42263	2.7	5.5	120	1900	2	N	75	SS	SOT-23-5
CXAS42264	2.7	5.5	120	1900	2.5	N	R	SS,External discharging	SOT-23-5/ADFN1.5X1.5-6
CXAS42265	2.7	5.5	70	1400	1	Y	130	N/A	SOT-23-5
CXAS42266	2.7	5.5	90	1200	ADJ	--	--	--	SOT-23-5
CXAS42267	2.7	5.5	90	1500	ADJ	Y	N	SS,   OC Setting by a R	SOP-8/TDFN2X2-6/ MSOP-8
CXAS42268	2	5.5	80	2500	2.5	N	153	Turn   on delay 800us	TDFN2X2-8
CXAS42269	2	5.5	85	1500	2.5	N	153	Turn on delay   800us	SOT-23-5
CXAS42270	1.5	5.5	80	1000	--	N	R	External   discharging	TDFN1.6X1.6-6
CXAS42271	2.7	5.5	70	1000	1.2	Y	N	SS, Fast SCP, HML 2.0 VOUT Reverse-Voltage Protection	SOT-23-6
CXAS42272	2.7	5.5	70	1000	3.3	Y	N	N/A	MSOP-8
CXAS42273	2.7	5.5	70	1000	1.5	Y	N	N/A	SOP-8
CXAS42274	2.7	5.5	125	1500	0.45	Y	75	N/A	SOP-8
CXAS42275	2.7	5.5	70	1500	2.5	Y	70	N/A	SOP-8/MSOP-8/ TDFN3X3-8
CXAS42276	0.6	5.5	5.5	ADJ	10	N	150	Need a 5V Bbias, A/B/C = 5.5/11/22 m ohm; 10A/6A/4A	TDFN3X3-8/MSOP-8(FD)/SOT-23-6