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RT9721B - 500mA High-Side Power Switches

This page provides the datasheet information for the RT9721B, a member of the RT9721A 500mA High-Side Power Switches family.

Description

The RT9721A/B are low voltage, single N-MOSFET highside power switches, optimized for self-powered and buspowered Universal Serial Bus (USB) applications.

Features

  • include soft-start to limit inrush current during plug-in, thermal shutdown to prevent catastrophic switch failure from high-current loads, under-voltage lockout (UVLO) to ensure that the device remains off unless there is a valid input voltage present. The maximum current is limited to typically 750mA in dual ports in accordance with the USB power requirements, lower quiescent current as 50uA making this device ideal for portable battery-operated equipment. The RT9721A is designed without outpu.

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Datasheet preview – RT9721B

Datasheet Details

Part number RT9721B
Manufacturer Richtek
File Size 197.40 KB
Description 500mA High-Side Power Switches
Datasheet download datasheet RT9721B Datasheet
Additional preview pages of the RT9721B datasheet.

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Full PDF Text Transcription

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® RT9721A/B 80mΩ, 500mA High-Side Power Switches with Flag General Description The RT9721A/B are low voltage, single N-MOSFET highside power switches, optimized for self-powered and buspowered Universal Serial Bus (USB) applications. The RT9721A/B series provides a charge pump circuitry to drive the internal MOSFET switch; the switch's low RDS(ON), 80mΩ, meets USB voltage drop requirements; and a flag output is available to indicate fault conditions to the local USB controller. Additional features include soft-start to limit inrush current during plug-in, thermal shutdown to prevent catastrophic switch failure from high-current loads, under-voltage lockout (UVLO) to ensure that the device remains off unless there is a valid input voltage present.
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