Switch ICs

USB High-side Switch

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

R5524x Basic circuit example

  • 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 High-side Switch

Product
Name
Class Package AEC-
Q100
Operating
Temp.
Range
Input
Voltage
Range
(Absolute
Max.)
ON
Resistance
Supply
Current
 Current Limit
Threshold
Short Current
Limit
Flag
Delay
Time
UVLO
Detect
Voltage
Int.
FET
EN Protection Remarks Data
Sheet
(PDF)
TYP. TYP. MAX. TYP. MAX. TYP.
R5523N H SOT-23-5   -40 to 85°C 2.2V to 5.5V
(6.5V)
130mΩ 20µA 1.0A 1.8A 750mA 1.5A 10ms 1.8V Pch. H/L Constant current type Thermal Soft Download
R5524N001
R5524N002
A SOT-23-5   -40 to 85°C 2.7V to 5.5V
(6.0V)
100mΩ 110µA 800mA 980mA 650mA 800mA 20ms 2.4V Nch. H Latch-off type
Constant current type
Auto-discharge function selectable
Thermal Reverse Soft
Download
R5524N004 1.55A 1.85A 650mA 800mA
Thermal : Thermal Shutdown Circuit   Soft : Soft Start circuit   Reverse : Reverse Current Protection Circuit

AEC-Q100

[ Automotive Class ]
Ricoh provides three classes of automotive products corresponding to required quality level.
 

Automotive ICs

 
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