Cxus7704 is a low-voltage monolithic n-MOSFET high side power switch, which is very suitable for self powered and bus powered USB applications. Cxus7704 is equipped with a charge pump circuit to drive the internal MOSFET switch; 80m Ω low on resistance meets the USB voltage drop requirements; the flag pin output can display the fault status to the local USB controller. Additional features include soft start to limit the inrush current when plugging in and out, over temperature shutdown protection to avoid catastrophic switch failure from high current load, and under voltage locking to ensure that the device is locked in the off state unless an effective input voltage is present. The maximum current is limited to 2.1a/1.5a/1a/0.65a typical value through switch cxus7704 / A / B / C / D respectively. The low static current of 25ua makes the device an ideal choice for portable power supply equipment. Cxus7704 is suitable for sot-23-5l package, requiring only a small circuit board space and a small number of peripherals
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[ CXUS7704A/C/D ]"
目录
产品概述 返回TOP
CXUS7704是一款低压单片N-MOSFET高边电源开关,非 常适用于自供电和总线供电的USB应用。CXUS7704配备 一个电荷泵电路来驱动内部MOSFET开关;80mΩ低导 通电阻满足USB压降要求;FLAG引脚输出可显示故 障状态给本地USB控制器。 附加特性还包括软启动来限制插拔时的浪涌电流,过 热关断保护可避免来自高电流负载的灾难性开关故 障,欠压锁定用来确保设备锁定在关闭状态,除非当 前有一个有效的输入电压出现。最大电流分别通过开 关CXUS7704/A/B/C/D 限制在 2.1A/1.5A/1A/0.65A 典 型 值,25uA的低静态电流使该设备成为便携式供电设备 的理想选择。 CXUS7704适用于SOT-23-5L封装,仅需要极小的电路板 空间和极少的外围器件。
产品特点 返回TOP
z 符合USB规范
z 宽输入电压范围:2.5V至5.5V
z 典型RDS(ON): 80mΩ z 典型值1.7V欠压锁定
z 输出可强制高于输入(关断状态)
z 低供电电流: 开启状态下典型值25uA 关断状态下典型值1uA
z 保证CXUS7704/B/C/D分别提供1.5A/1A/0.8A/0.5A 的连续负载电流
z 开漏故障标志输出
z 热插拔应用(软启动)
z 电流限制保护
z 过热关断保护
z 反向电流阻断(无寄生二极管)
应用范围 返回TOP
z USB总线/自供电集线器
z USB周边
z ACPI配电系统
z PC卡热插拔
z 笔记本电脑,主板电脑
z 电池供电设备
z 热插拔电源
z 电池充电器电路
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产品封装图 返回TOP
电路原理图 返回TOP
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USB限流开关IC |
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型号 |
工作电压 |
电流限制 |
静态电流 |
截止电流 |
内阻 |
欠压锁 定电压 |
抗静电 电压 |
响应时间 |
封装 |
2.4V-5.5V |
1A可调 |
15uA |
1uA |
80 mohm |
1.8V |
2 KV |
2 uS |
SOT-25 |
|
2.0V-6.5V |
2.1A可调 |
40uA |
1uA |
70 mohm |
1.7V |
8 KV |
4.6 mS |
SOT-25 |
|
2.2V-6.0V |
1.1A |
23uA |
0.1uA |
100 mohm |
1.8V |
6KV |
400 uS |
SOT-25 |
|
2.2V-6.0V |
1.5A |
23uA |
0.1uA |
50 mohm |
1.8V |
6KV |
400 uS |
SOT-25 |
|
2.5V-5.5V |
2.1A/1.0A/0.65A |
25uA |
0.1uA |
80 mohm |
1.7V |
4 KV |
400 uS |
SOT-25 |
|
2.5V-5.5V |
2.1A |
25uA |
0.1uA |
80 mohm |
1.7V |
4 KV |
400 uS |
SOT-25 |
|
2.0V-5.5V |
0.8A |
50uA |
0.5uA |
200 mohm |
1.7V |
8 KV |
4.6 mS |
SOT-25 |