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MAX1931 - Current-Limited Switch for Single USB Port

General Description

The MAX1931 is a current-limited, 60mΩ switch with built-in fault blanking.

Its accurate preset current limit of 0.64A to 1.06A makes it ideally suited for USB applications.

The device’s low quiescent supply current (14µA) and shutdown current (1µA) conserve battery power in portable applications.

Key Features

  • to ensure that the USB port is protected. Built-in thermal overload protection limits power dissipation and junction temperatures. The device has an accurate internal current-limiting circuitry to protect the input supply against overload. The MAX1931 is available in a space-saving 10-pin µMAX package. o 0.5A Guaranteed Output Current o Guaranteed 0.75A Short-Circuit Protection o 10ms Internal Fault-Blanking Timeout o No Fault Signal During Power-Up o Thermal Shutdown Protection o 2.7V to 5.5V S.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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19-2357; Rev 0; 4/02 Current-Limited Switch for Single USB Port General Description The MAX1931 is a current-limited, 60mΩ switch with built-in fault blanking. Its accurate preset current limit of 0.64A to 1.06A makes it ideally suited for USB applications. The device’s low quiescent supply current (14µA) and shutdown current (1µA) conserve battery power in portable applications. The MAX1931 operates with inputs from 2.7V to 5.5V, making it 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.