CXAS42221是一个集成的95mΩ（典型）电源开关，用于自供电和总线供电的通用系列总线（USB）应用。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。低静态电源电流和小封装特别适用于电池供电的便携式设备。
多个保护功能包括软启动以限制插入期间的涌入电流，电流限制在1.85A以满足USB电源要求，以及热关机以防止在过电流条件下损坏。
•95mΩ（典型值）高边N沟道MOSFET
•保证1.1A持续电流
•1.85A电流限制
•输入电压范围：2.2V至5.5V
•低19μA电源电流
•停机模式下小于1μA
•软启动功能
•热关机保护
•欠压锁定保护
•无反向泄漏电流
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[ CXAS42221 ]"
目录
7.相关产品
产品概述 返回TOP
The CXAS42221 is an integrated 95mΩ (TYP) power switch for self-powered and bus-powered Universal Series Bus (USB) applications. 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. Low quiescent supply current and small package are particularly suitable in battery-powered portable equipment.
Several protection functions include soft-start to limit inrush current during plug-in, current limiting at 1.85A to meet USB power requirement, and thermal shutdown to prevent damage under over current conditions.
The CXAS42221 is available in a Green SOT-23-5 package and is rated over the -40℃ to +85℃ temperature range.
产品特点 返回TOP
• 95mΩ (TYP) High-side N-Channel MOSFET
• Guaranteed 1.1A Continuous Current
• 1.85A Current Limit
• Input Voltage Range: 2.2V to 5.5V
• Low 19μA Supply Current
• Less than 1μA in Shutdown Mode
• Soft-Start Function
• Thermal Shutdown Protection
• Under-Voltage Lockout Protection for VIN
• No Reversed Leakage Current
• Available in Green SOT-23-5 Package
应用范围 返回TOP
Motherboard USB Power Switch
USB Device Power Switch
Hot-Plug Power Supplies
Load Switch
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产品封装图 返回TOP
电路原理图 返回TOP
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负载开关 |
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Part Number |
VCC(Min) (V) |
VCC(Max) (V) |
Iq (μA) |
Continuous Output Current(mA) |
SHDN Iq (μA) |
Current Limit(mA) |
Soft-Start |
Package |
|
2.2 |
5.5 |
19 |
1100 |
1 |
1850 |
Y |
SOT-23-5 |
|
|
2.2 |
5.5 |
19 |
1100 |
NA |
1750 |
Y |
SOT-23-5 |
|
|
2.2 |
5.5 |
19 |
1100 |
1 |
1850 |
Y |
TDFN-2x2-6L |
|
|
1 |
5 |
5 |
1000 |
1.5 |
1600 |
WLCSP-0.9x0.9-4B |
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