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MAX1812：双路、USB开关，带有故障屏蔽

The MAX1812 is a dual current-limited switch specifically made for USB applications. Each channel is guaranteed to supply 500mA and meets USB specifications. The MAX1812's low quiescent supply current (45µA) and shutdown current (3µA) conserve battery power in portable applications. The MAX1812 has multiple safety features to ensure that the USB port is protected. Built-in thermal-overload protection limits power dissipation and junction temperature. The device also has accurate internal current-limiting circuitry to protect the input supply against both overload and short-circuit conditions. Independent fault signals (active-low FAULTA and active-low FAULTB) notify the microprocessor when a thermal-overload, current limit, undervoltage lockout, or short-circuit fault occurs. A 20ms fault-blanking feature enables the circuit to ignore momentary faults, such as those caused when hot-swapping a capacitive load, thereby preventing false alarms to the host system. The MAX1812 is available in a space-saving 10-pin µMAX package. For single versions of this device, refer to the MAX1693, MAX1694, and MAX1607 data sheets.

关键特性 Dual USB Switch in Tiny 10-Pin µMAX Package Guaranteed 500mA Load per Channel Built-In 20ms Fault Blanking Compliant to USB Specifications +4.0V to +5.5V Input Voltage Range 45µA Quiescent Current 3µA Shutdown Current Independent Shutdown Control Independent active-low FAULT Indicator Outputs Thermal-Overload Protection

MAX1812：典型工作电路 应用 计算机：台式机、工作站和服务器 坞站 笔记本电脑 PDA与掌上电脑 USB集线器 USB端口

数据手册DataSheet

关键参数

质量和环境数据

• MAX1812.pdf

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