MIC2505 Micrel Semiconductor, MIC2505 Datasheet - Page 10

• Manufacturer Part Number: MIC2505
• Description: Single 2A / Dual 1A / High-Side Switches
• Manufacturer: Micrel Semiconductor

MIC2505/2506
Applications Information
USB Application
Figure 4 depicts a low cost and robust implementation of a
four-port, self-powered USB hub circuit employing ganged
overcurrent protection.
MIC2505/2506
4.45V to 5.25V
3.5A max.
(+)
(–)
Bold lines indicate
0.1" wide, 1-oz. copper
high-current traces.
D+
GND
V
D–
BUS
33µF
4.7
µF
LDO Regulator
MIC5203-3.3
MIC5207-3.3
IN
GND
OUT
1.0
µF
Figure 4. Ganged-Switch Self-Powered Hub
3.3V USB Controller
V+
D+
D–
OVERCURRENT
100k
GND
ON/OFF
10
EN
FLG
GND
GATE
MIC2505-2/-1
OUT
OUT
IN
IN
0.1µF
33µF
33µF
33µF
33µF
Data
Ferrite
Bead
0.01µF
0.01µF
0.01µF
0.01µF
GND
GND
GND
GND
V
V
V
V
BUS
BUS
BUS
BUS
D+
D–
D+
D–
D+
D–
D+
D–
Downstream
500mA max.
Downstream
500mA max.
Downstream
500mA max.
Downstream
500mA max.
April 1998
Port 1
Port 2
Port 3
Port 4
USB
USB
USB
USB
Micrel