CXAS42257超小型低导通电阻Ron负载开关可控开启功能含一个P沟道MOSFET在1.0V到3.6V的输入电压范围内工作开关由一个开/关输入EN控制直接与低压控制信号连接低控制输入阈值允许使用低电压逻辑控制回转率以避免涌流

CXAS42257是一款超小型、低导通电阻（Ron）负载开关，具有可控开启功能。该器件包含一个P沟道MOSFET，在1.0V到3.6V的输入电压范围内工作。开关由一个开/关输入（EN）控制，它能够直接与低压控制信号连接。在CXAS42257中，当开关断开时，增加了一个80Ω片上负载电阻器，用于输出快速放电。CXAS42257采用节省空间的4端WLCSP，间距为0.5毫米。这些装置的特点是在-40°C至80°C的自由空气温度范围内运行。

低输入电压1.0V至3.6V
“超低RON
·1A最大持续工作电流。
·超低静态电流<1μA
超低日落电流<2.5μA
·低控制输入阈值允许使用低电压逻辑。
控制回转率以避免涌流
快速输出放电。
·1.0 mmX1.0 mm 4销，销距0.5 mm超小型CSP封装
·输入引脚拉低电阻250kΩ。

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 CXAS42257 is ultra-small, low ON resistance (Ron) load switches with controlled turn on. The devices contain a P-channel MOSFET that operates over an input voltage range 1.0V to 3.6V. The switch is controlled by an on/off input (EN), which is capable of in interfacing directly with low-voltage control signals. In CXAS42257 a 80Ω on-chip load resistor is added for output quick discharge when the switch is turned off. CXAS42257 is available in a space-saving 4-terminal WLCSP with 0.5mm pitch. The devices are characterized for operation over the free-air temperature range for -40°C to 80°C.

   产品特点 返回TOP

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„ Low input voltage 1.0V to 3.6V 

„ Ultra low RON 

 - RON =26mΩ at VIN=3.6V 

 - RON =30mΩ at VIN=2.5V 

 - RON =35mΩ at VIN=1.8V 

- RON =56mΩ at VIN=1.2V 

„ 1A maximum continuous operating current. 

„ Ultra low quiescent current<1μA 

„ Ultra low sundown current<2.5μA 

„ Low Control Input Thresholds Enable Use of Low-Voltage Logic. 

„ Controlled Slew Rate to Avoid Inrush Currents 

„ Quick Output Discharge. 

„ 1.0 mmX1.0 mm 4-pin, pin pitch 0.5mm ultra small CSP Package 

„ With Input Pin Pull Low resistance 250kΩ.

   应用范围 返回TOP

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„ Cellular phones. 

„ Personal Digital Assistants (PDAs) 

„ GPS Devices 

„ MP3 Players 

„ Digital Cameras 

„ RF Modules 

„ Peripheral Ports 

„ Portable Instrumentation

   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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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