ENA 1
FLGA 2
FLGB 3
ENB 4
SP2525
8 OUTA
7 IN
6 GND
5 OUTB
+5.0V
0.1µF to 1.0µF
USB
Controller
OVERCURRENT
+5.0V
0.1µF
10kΩ
10kΩ
ENA 1
FLGA 2
FLGB 3
ENB 4
SP2525
8 OUTA
7 IN
6 GND
5 OUTB
Figure 4. Bypass Capacitor at the Supply Pins
Figure 5. An RC Filter for Overcurrent Faults
USB
Controller
USB Powered Hub
VBUS
USB
Cable
USB Host
4.7µF
GND
ENA 1
FLGA 2
FLGB 3
ENB 4
SP2525
8 OUTA
7 IN
6 GND
5 OUTB
0.1µF
CBULK
USB Downstream
Cable USB Device
Figure 6. Soft Start Circuit Configuration for a Single Channel USB-powered Application with the SP2526
Rev. 8/21/01
SP2525 +3.0 to +5.5 Power Control Switch
9
© Copyright 2001 Sipex Corporation