CXAS42281一个双P通道MOSFET电源开关高压侧负载开关应用而设计每个MOSFET在VCC=5V时具有的74mΩ RDS（ON)在低正向电压降下增加负载开关电流处理能力TTL/CMOS输入逻辑电平

CXAS42281在1.5V到5.5V的输入电压下工作。它适用于1.8V、3V和5V系统。输入逻辑电平与TTL和2.5V至5V CMOS兼容。典型的静态电源电流为每个通道4μA。在关机模式下，电源电流降低到小于1μA。CXAS42281有8针TDFN 2x2毫米封装。CXAS42281是一个双P通道MOSFET电源开关，专为高压侧负载开关应用而设计。每个MOSFET在VCC=5V时具有典型的74mΩRDS（ON），允许在低正向电压降下增加负载开关电流处理能力。CXAS42281有一个回转率限制接通负载开关，并提供一个停机负载放电电路，以便在开关被禁用时快速断开负载电路。另一个特点是回转率选择器引脚，可以在快速和慢速回转率之间切换。

1.5V至5.5V输入电压范围
·非常低的RDS（开），通常为74mΩ（5V）
·回转率限制开启时间1毫秒（5伏）
快速关闭负载释放
TTL/CMOS输入逻辑电平

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 CXAS42281 operates with an input voltage from 1.5V up to 5.5V. It is suitable for 1.8V, 3V and 5V systems. Input logic levels are TTL and 2.5V to 5V CMOS compatible. The typical quiescent supply current is 4μA each channel. In shutdown mode, the supply current decreases to less than 1μA. The CXAS42281 is available in a 8 pin TDFN 2X2mm package.The CXAS42281 is a dual P-channel MOSFET power switch designed for high-side load-switching applications. Each MOSFET has a typical RDS(ON) of 74mΩ at VCC=5V, allowing increased load switch current handling capacity with a low forward voltage drop. The CXAS42281 has a slew rate limited turn-on load switch and offers a shutdown load discharge circuit to rapidly turn off a load circuit when the switch is disabled. An additional feature is a slew-rate selector pin which can switch between fast and slow slew rate.

   产品特点 返回TOP

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„ 1.5V to 5.5V Input Voltage Range 

„ Very Low RDS(ON), Typically 74mΩ (5V) 

„ Slew Rate Limited Turn-On Time 1ms (5V) 

„ Fast Shutdown Load Discharge 

„ TTL/CMOS Input Logic Level 

„ TDFN2X2-8 Package

   应用范围 返回TOP

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„ Cellular Telephones 

„ Digital Still Cameras 

„ Hot Swap Supplies 

„ Notebook Computers 

„ Personal Communication Devices 

„ Personal Digital Assistants (PDAs)

   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