CXUS7702可调电流限制3.5A低电压高性能的单N-MOSFET功率开关全保护功能的电源轨开关控制电荷泵电路热插拔应用软启动

CXUS7702是一款低电压、高性能的单N-MOSFET功率开关，专为具有低RDS（on）≈70mΩ和全保护功能的电源轨开/关控制而设计。CXUS7702配有一个电荷泵电路，用于驱动内部MOSFET开关和一个标志输出，用于指示针对大di/dt的故障情况，这可能导致电源失去调节。为了适应不同的应用，提供了一个ISET引脚来设置电流限制点，一个ISET到接地的电阻来设置开关的电流限制。附加功能包括软启动以限制插入期间的涌入电流，热关机以防止大电流负载导致灾难性开关故障，输出防回流保护（无论EN-pin连接的是GND还是VIN），欠压锁定（UVLO）确保设备保持关闭，除非存在有效的输入电压，精密电阻可编程输出电流限制高达3.5A。此外，较低的静态电流为40μa，使该设备成为便携式电池操作设备的理想选择。

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 CXUS7702 is a low voltage, high performance single N-MOSFET power switch, designed for power rail on/off control with low RDS(ON)≈70mΩ and full protection functions. The CXUS7702 equipped with a charge pump circuitry to drive the internal MOSFET switch and a flag output is available to indicate fault conditions against large di/dt which may cause the supply to fall out of regulation. In order to fit different application, an ISET pin is offered for current limit point setting, a resistor from ISET to ground sets the current limit for the switch. Additional features include soft-start to limit inrush current during plug-in, thermal shutdown to prevent catastrophic switch failure from high-current loads, Output anti back irrigation Protection whether EN pin is connected GND or VIN, under-voltage lockout (UVLO) to ensure that the device remains off unless there is a valid input voltage present, a precision resistor-programmable output current limit up to 3.5A. Besides, the lower quiescent current as 40μA making this device ideal for portable battery-operated equipment. 

The CXUS7702 is available in SOT23-5 or SOP-8 package requiring minimum board space and smallest components.

   产品特点 返回TOP

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 Adjustable Current Limiting up to 3.5A 

 Built-In (Typically 70mΩ) N-MOSFET 

 Reverse Current Flow Blocking (no body diode) 

 Output Can Be Forced Higher than Input (Off or On State) 

 Low Supply Current : 

--------40μA Typical at Switch on State

 --------Less than 1μA Typical at Switch Off State 

 Guaranteed Continuous Load Current 

-------CXUS7702MR（SOT23-5）：2.1A 

-------CXUS7702S（SOP-8） ：3A 

 Wide Input Voltage Ranges : 2V to 5.5V 

 Open-Drain Fault Flag Output 

 Hot Plug-In Application (Soft-Start) 

 1.7V Typical Under-Voltage Lockout (UVLO) 

 Thermal Shutdown Protection 

 Smallest SOT23-5 and SOP-8 Package 

 RoHS Compliant and 100% Lead (Pb)-Free

   应用范围 返回TOP

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 USB 3G Datacard 

 USB Dongle 

 MiniPCI Accessories 

 LCD Monitor, LCD-TV 

 USB Power Module for ADSL 

 Information Appliance and Set-Top Box 

 Battery-Powered Equipment 

 Hot-Plug Power Supplies 

 ACPI Power Distribution 

 PCI Bus Power Switching 

 Motherboard & Notebook PCs 

 PC Card Hot Swap Application

   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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USB限流开关IC
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
CXUS7701H/L	2.4V-5.5V	1A可调	15uA	1uA	80 mohm	1.8V	2 KV	2 uS	SOT-25
CXUS7702	2.0V-6.5V	2.1A可调	40uA	1uA	70 mohm	1.7V	8 KV	4.6 mS	SOT-25
CXUS7703CB	2.2V-6.0V	1.1A	23uA	0.1uA	100 mohm	1.8V	6KV	400 uS	SOT-25
CXUS7703DB	2.2V-6.0V	1.5A	23uA	0.1uA	50 mohm	1.8V	6KV	400 uS	SOT-25
CXUS7704A/C/D	2.5V-5.5V	2.1A/1.0A/0.65A	25uA	0.1uA	80 mohm	1.7V	4 KV	400 uS	SOT-25
CXUS7705A	2.5V-5.5V	2.1A	25uA	0.1uA	80 mohm	1.7V	4 KV	400 uS	SOT-25
CXUS7706	2.0V-5.5V	0.8A	50uA	0.5uA	200 mohm	1.7V	8 KV	4.6 mS	SOT-25