
Ver: 1.2
May 17, 2005
TEL: 886-3-5788833
http://www.gmt.com.tw
5
G528/G528A
Global Mixed-mode Technology Inc.
Pin Description
PIN
G528
G528A
NAME
PIN FUNCTION
1
GND
Ground.
2,3
IN
Input Supply: Output MOSFET source, which also supplies IC's internal circuitry. Connect to
positive supply.
4
EN
Active-low switch enable input. A logic low turns on the switch.
4
EN
Active-High switch enable input. A logic High turns on the switch.
5
FLG
Open-Drain Fault Flag (Output): Active-low, open-drain output. Indicates overcurrent, thermal
shutdown and UVLO.
6,7,8
OUT
Switch Output: Output MOSFET drain. Typically connect to switched side of load.
Typical Applications
Single-Port Self-Powered USB Hub Application
Function Block Diagrams
Upstream
V
100mA max.
VBUS
D+
D
-
GND
Data
GND
IN OUT
3.3 V USB Controller
VIN
ON/OFF
G528
OUT
GND
+
USB
Port
Data
D+
GND
Ferrite
Beads
GND
150F
G911
EN
0.1F
VCC
V
BUS
100mA max.
D
-
GND
Data
GND
IN
OUT
VIN
ON/OFF
OUT
GND
+
USB
Port
Data
V
BUS
D
-
Ferrite
Beads
1F
GND
150F
1F
EN
0.1F
OC
FLG
5.0V
10K
100K
IN
Upstream
V
100mA max.
VBUS
D+
D
-
GND
Data
GND
IN OUT
3.3 V USB Controller
VIN
ON/OFF
G528
OUT
GND
+
USB
Port
Data
D+
GND
Ferrite
Beads
GND
150F
G911
EN
0.1F
VCC
V
BUS
100mA max.
D
-
GND
Data
GND
IN
OUT
VIN
ON/OFF
OUT
GND
+
USB
Port
Data
V
BUS
D
-
Ferrite
Beads
1F
GND
150F
1F
EN
0.1F
OC
FLG
5.0V
10K
100K
IN
Upstream
V
100mA max.
VBUS
D+
D
-
GND
Data
GND
IN OUT
3.3 V USB Controller
VIN
ON/OFF
G528
OUT
GND
+
USB
Port
Data
D+
GND
Ferrite
Beads
GND
150F
G911
EN
0.1F
VCC
V
BUS
100mA max.
D
-
GND
Data
GND
IN
OUT
VIN
ON/OFF
OUT
GND
+
USB
Port
Data
V
BUS
D
-
Ferrite
Beads
1F
GND
150F
1F
EN
0.1F
OC
FLG
5.0V
10K
100K
IN
Clock
BandGap
Reference
UVLO
Thermal Sense
Overcurrent
Limiting
Gate Control
Current
Sense
CMP
IN
OUT
FLG
EN
GND
Clock
BandGap
Reference
UVLO
Thermal Sense
Overcurrent
Limiting
Gate Control
Current
Sense
CMP
IN
OUT
FLG
EN
GND