Cxus7703db is a power switch circuit with only 50m Ω on internal resistance and applied to USB power supply. The built-in charge pump boosts the voltage to drive the NMOS power transistor. When it is in the off state, the reverse conduction current of the switch is eliminated by the parasitic reverse body diode. Low static power consumption (23 μ a) and small package (sot-23-5) are especially suitable for battery powered portable devices. The protection circuit includes the soft start circuit to prevent the inrush current during power on. The 1.5A over-current protection circuit is necessary for USB power supply. The built-in thermal shutdown protection circuit and short-circuit protection circuit are also included.
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[ CXUS7703DB ]"
目录
产品概述 返回TOP
CXUS7703DB是一款只有50mΩ 导通内阻,应用于USB供电的电源开关电路。内置电荷泵升压来驱动NMOS功率管, 当处于关断状态时通过寄生的反向体二极管来消除开关的反向导通电流。低的静态功耗(23μA)和小封装(SOT-23-5) 特别适合电池供电的便携式设备使用。 保护电路包括防止上电过程中的涌入电流的软启电路, 1.5A过流保护电路是USB电源必须的,内置热关断保护电 路以及短路保护电路。
产品特点 返回TOP
输入电压:2.2V 到 6V
导通内阻:50mΩ(典型值)
1.5A 过流保护电路
静态电流:23μA
软启电路
过热保护和短路保护
微型封装
应用范围 返回TOP
电池供电设备,便携式设备
USB 供电的电源开关电路
电池充电器
热插拔电源供电
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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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 |