MAX1693|MAX1693H - USB限流型开关，带有故障屏蔽

MAX1693|MAX1693H是Maxim美信半导体公司的一款USB产品产品，MAX1693|MAX1693H是USB限流型开关，带有故障屏蔽，本站介绍了MAX1693|MAX1693H的封装应用图解、特点和优点、功能等，并给出了与MAX1693|MAX1693H相关的Maxim元器件型号供参考。

MAX1693|MAX1693H - USB限流型开关，带有故障屏蔽 - USB产品 - 单通道USB限流开关，带有故障屏蔽，采用µMAX封装 - 美信半导体

产品概述

The MAX1693/(MAX1693H)/MAX1694 are current-limited, 60mΩ switches with built-in fault blanking. Their accurate preset current limit of 0.7A to 1.0A makes them ideally suited for USB applications. Their low quiescent supply current (14µA) and shutdown current (1µA) conserve battery power in portable applications. The MAX1693/(MAX1693H)/MAX1694 operate with inputs from +2.7V to +5.5V, making them ideal for both +3V and +5V systems.

A fault signal notifies the microprocessor that the internal current limit has been reached. A 10ms fault-blanking feature allows momentary faults (such as those caused when hot-swapping into a capacitive load) to be ignored, thus preventing false alarms to the host system. This fault blanking also prevents a fault signal from being issued when the device is powering up.

In the MAX1693/(MAX1693H), an output overcurrent condition causes the switch to current limit at 0.7A to 1.0A and active-low FAULT to go low after the 10ms blanking period. When the overcurrent condition is removed, active-low FAULT returns to its high-impedance state. In the MAX1694, any overcurrent longer than 10ms will latch the switch open and set active-low FAULT low. The latch is cleared by cycling the active-low ON input or by powering up the device again. This feature saves power by preventing the device from thermally cycling on and off in case of a persistent short-circuit condition.

The MAX1693/(MAX1693H)/MAX1694 have several safety features to ensure that the USB port is protected. Built-in thermal-overload protection limits power dissipation and junction temperatures. Both devices have accurate internal current-limiting circuitry to protect the input supply against overload. They are available in space-saving 10-pin µMAX® packages.

关键特性

以下关键特性由Maxim美信半导体提供：

Accurate Current Limit (0.7A min, 1.0A max)

Guaranteed 0.75A Short-Circuit Protection

10ms Internal Fault-Blanking Timeout

No Fault Signal During Power-Up

Latched active-low FAULT Output Turns Off Power Switch (MAX1694)

Thermal Shutdown Protection

+2.7V to +5.5V Supply Range

14µA Supply Current

Small 10-Pin µMAX Package

热门应用

电池充电器

坞站

热插拔供电

笔记本电脑

便携式设备

USB端口和集线器

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