USB Switch

USB Switch

There are two main roles of USB. Recently, USB switch IC is used as aload switch with protections."

R5524x Typical Application

  • 1. USB Power Line's ON/OFF Control
    By the enable signal from another device such as a USB Host Controller, the USB switch turn on the USB power line with suppressing inrush current with soft-start function.
    On the contrary, by the disable signal, the USB switch cut off the power line with or without auto-discharge function (Option).
  • 2. USB Power Line Protection
    There is protection capability against the abnormal heating in the USB switch, and if preset over-current is detected, output current is limited or power is cut off and latched for protection.
  • *1FLG pin has N-channel open drain output, therefore pull-up resistance is necessary when it is used. The output of FLG pin becomes "L" when the thermal shutdown or over-current limit-function works.
  • *2According to the USB standard,120µF or more capacitor attachment is recommended, however, as an IC, changing capacitor is acceptable considering other usage.

USB Switch Lineup

Product
Name
ON
Resistance
Supply
Current
Operating
Voltage
Range
UVLO
Detect
Voltage
Current Limit
Threshold
Short
Current Limit
Internal
FET
EN Protection
Tyoe
Other Features? Package Data
Sheet
(PDF)
Typ. Typ. Min. Typ. Min. Typ.
R5520H 100mΩ 20µA 4.0V to 5.5V 2.2V 1.2A 500mA 750mA Pch H/L Constant current Thermal SOT-89-5 Download
R5523N 130mΩ 20µA 2.2V to 5.5V 1.8V 1A 500mA 750mA Pch H/L Constant current Thermal SOT-23-5 Download
R5524x001A/B
R5524x002A/B
100mΩ 110µA 2.7V to 5.5V 2.4V 650mA 800mA 550mA 650mA Nch H Latch-off type/
Constant current
Thermal
Reverse : OFF
Discharge : xxxA
DFN(PLP)
1820-6

SOT-23-5
Download
R5524N004A 1.25A 1.55A Constant current SOT-23-5

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    Selection guide is available for download in PDF format.

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