CXAS42285 CXAS42286系列交换机具有内部电流限制功能，以防止主机设备因故障负载条件而损坏。这些模拟开关的导通电阻低0.2Ω，工作电压范围为2.3V至5.5V。它们有保证的200毫安和100毫安电流限制，使它们成为负载切换应用的理想选择。当开关接通且负载连接到端口时，典型的40毫秒消隐时间可确保瞬态电压稳定下来。如果在此消隐时间之后，负载电流大于电流限制，则CXAS42285进入闩锁关闭状态，在该状态下，开关关闭并向微处理器发出标志。可通过循环通电或接通引脚再次接通开关。CXAS42285的ON引脚处于高激活状态。CXAS42286具有自动重新启动功能，在该功能中，开关在消隐时间后关闭，然后连续检查是否存在过载情况。过载状态消失后，开关保持接通。
200Ω导通电阻
电流限制：275毫安（CXAS42285A/CXAS42286A）、175毫安（CXAS42285B/CXAS42286B）、250毫安（CXAS42285C/CXAS42286C）、150毫安（CXAS42285D/CXAS42286D）
·2.3V至5.5V电源范围
·欠压锁定
85μA供电电流
·30μA闭锁电流
·1μA最大关闭电流
闭锁功能（CXAS42285X）和自动重启功能（CXAS42286X）
·高激活
热关机保护
反向电流限制保护
·40毫秒消隐时间
280ms自动重启时间（CXAS42286X）
·标志功能
快速电流限制响应时间
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[ CXAS42285/6 ]"
目录
7.相关产品
产品概述 返回TOP
The CXAS42285/CXAS42286 family of switches feature internal current limiting to prevent host devices from being damaged due to faulty load conditions. These analog switches have a low 0.2Ω on-resistance and operate from a 2.3V to 5.5V input voltage range. They are available with guaranteed 200mA and 100mA current limits, making them ideal for load-switching applications. When the switch is on and a load is connected to the port, a typical blanking time of 40ms ensures that the transient voltages settle down. If after this blanking time the load current is greater than the current limit, the CXAS42285 enter a latch-off state where the switch is turned off and FLAG is issued to the microprocessor. The switch can be turned on again by cycling the power or the ON pin. The ON pin of CXAS42285 is active high. The CXAS42286 have an auto-restart feature where the switch turns off after the blanking time and then continuously checks to see if the overload condition is present. The switch remains on after the overload condition disappears. The CXAS42285/CXAS42286 is available in TSOT-23-5 package.
产品特点 返回TOP
„ 200mΩ On-Resistance
„ Current Limit : 275mA (CXAS42285A/CXAS42286A), 175mA (CXAS42285B/CXAS42286B), 250mA(CXAS42285C/CXAS42286C), 150mA (CXAS42285D/CXAS42286D)
„ 2.3V to 5.5V Supply Range
„ Undervoltage Lockout
„ 85μA Supply Current
„ 30μA Latch-OFF Current
„ 1μA Maximum Shutdown Current
„ Latch-off Function(CXAS42285X) and Auto-Restart Function(CXAS42286X)
„ Active High Enable
„ Thermal-Shutdown Protection
„ Reverse-Current Limit Protection
„ 40ms Blanking Time
„ 280ms Auto-Restart Time(CXAS42286X)
„ FLAG Function
„ Fast Current-Limit Response Time
„ TSOT-23-5 Package
应用范围 返回TOP
„ PDAs
„ Cell Phones
„ GPS Systems
„ Hand-Held Devices
技术规格书（产品PDF) 返回TOP
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产品封装图 返回TOP
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 |
|
0.8 |
5.5 |
10 |
ADJ |
6 |
N |
220 |
3V ~ 5V Vbias Needs |
AQFN2X2-10 |
|
|
0.8 |
5.5 |
16 |
ADJ |
6 |
N |
220 |
3V ~ 5V Vbias Needs |
TDFN2X3-14 |
|
|
2 |
5.5 |
87 |
400 |
2 |
Y |
200 |
UL,CB,A/B/C/D/ ILimit=2A/1.5A/1A/0.75A |
SOP-8 |
|
|
2.7 |
5.5 |
100 |
400 |
1 |
Y |
N |
UL, CB |
SOP-8 |
|
|
2.7 |
5.5 |
74 |
1000 |
2 |
Y |
N |
SS |
TDFN2X2-8 |
|
|
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 |
|
|
2.7 |
5.5 |
118 |
400 |
0.45 |
Y |
N |
N/A |
SOP-8 |
|
|
2.7 |
5.5 |
118 |
400 |
2 |
Y |
N |
N/A |
SOP-8 |
|
|
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 |
|
