USB High-side Switch

USB High-side Switch

R5524x Basic circuit example
*) FLG pin is N-channel open drain output.
*2) For the USB standard, the capacitor value of 120µF or more must be connected with the output pin.
But can be used about 47µF capacitor.

The functions of the USB high-side switch are mainly as follows:

  • ON/OFF control of the USB power line
    By an enable signal from the USB host controller, the USB highside switch turns on USB power line smoothly with its soft-start function and turns off to cut off the external low-side device.
  • Protection of the USB power line
    In addition to an abnormal over heat protection, when the USB high-side switch detects an over current , it limits an over current to a constant current or cuts off a USB power line by latch-off protection function.

USB High-side Switch Products Lineup

Product
Name
ON Resistance Supply
Current
Operating Voltage Range UVLO
Detect
Voltage
Current Limit Threshold Short
Current Limit
Internal
FET
Reverse
Current
Protection
at OFF state
EN Thermal
Shutdown
Protection Package Remarks 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 type SOT-89-5   Download
R5523N 130mΩ 20µA 2.2V to 5.5V 1.8V 1A 500mA 750mA Pch - H/L * Constant current type 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 type
DFN(PLP)
1820-6

SOT-23-5
Auto-discharge function selectable Download
R5524N004A 1.25A 1.55A Constant current type SOT-23-5

*

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    Selection guide is available for download in PDF format.

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