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PDF G528 Data sheet ( Hoja de datos )
| Número de pieza | G528 | |
| Descripción | USB High-Side Power Switch Advance Information | |
| Fabricantes | Global Mixed-mode Technology | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de G528 (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
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Global Mixed-mode Technology Inc.
G528/G528A
USB High-Side Power Switch Advance Information
Features
Typical 110mΩ, Low MOSFET on resistance, at
5.0V
3.0V to 5.5V operating range
100 µA typical on-state supply current
1µA typical standby supply current
Output can be forced higher than input when
operating in off state.
1.4A Typical current limit
Thermal shutdown protection
2.4V typical under-voltage lockout (UVLO)
Open-drain fault flag pin
Slow turn-on (soft-start) and fast turnoff
Logic level enable pin, available with active-low
version (G528), or available with active-high
version (G528A)
UL Approved_#E232223
Applications
High-side power protection switch
USB power management
USB host and self-powered hubs
USB Bus-powered hubs
Hot plug-in power supplies
Battery-charger circuits
General Description
The G528/G528A is an integrated high-side power
switch optimized for self-powered and bus-powered
Universal Serial Bus (USB) applications.
The G528/G528A satisfies the USB standards. The
switch's low on-resistance meets USB voltage drop
requirements. When the output load exceeds cur-
rent-limit threshold, G528/G528A switches into con-
stant-current mode and limit the output current to a
safe level, which is typically 1.4A. An open-drain flag
output is also available to indicate fault conditions to
the local USB controller. Soft start eliminates the mo-
mentary voltage drop on the upstream port that may
occur when the switch is enabled in bus-powered
applications.
Besides, a thermal shutdown circuit is included to
prevent catastrophic switch failure caused by increas-
ing power dissipation when continuous heavy loads or
short circuit occurs. A under-voltage lockout (UVLO)
circuit ensures that the device remains off unless there
is a valid input voltage present, and an enable input
that is compatible with both 3.3V and 5V logic.
Ordering Information
ORDER
NUMBER
G528P1U
G528AP1U
Note: P1: SOP-8L
U: Tape & Reel
ORDER NUMBER
(Pb free)
G528P1Uf
G528AP1Uf
Pin Configuration
ENABLE
Active Low
Active High
TEMP.
RANGE
-40°C to +85°C
-40°C to +85°C
PACKAGE
SOP-8
SOP-8
Ver: 1.2
May 17, 2005
G528/G528A
GND 1
8 OUT
IN 2
7 OUT
IN 3
6 OUT
EN 4
(EN)
SOP-8
5 FLG
1
TEL: 886-3-5788833
http://www.gmt.com.tw
1 page  
Global Mixed-mode Technology Inc.
Pin Description
G528/G528A
PIN
G528 G528A
11
2,3 2,3
4
4
55
6,7,8 6,7,8
NAME
PIN FUNCTION
GND
IN
EN
EN
FLG
OUT
Ground.
Input Supply: Output MOSFET source, which also supplies IC's internal circuitry. Connect to
positive supply.
Active-low switch enable input. A logic low turns on the switch.
Active-High switch enable input. A logic High turns on the switch.
Open-Drain Fault Flag (Output): Active-low, open-drain output. Indicates overcurrent, thermal
shutdown and UVLO.
Switch Output: Output MOSFET drain. Typically connect to switched side of load.
Typical Applications
Upstream
VBUS
100mA max.
G911
VBUS
IINN OOUUTT
D+
D－
1µF
GND
GND
VCC
5.0V
10K
3.3 V USB Controller
VIN ON/OFF
OC
1µF GND
100K G528
EENN OUT
FLG
IN
GND
0.1µF
Ferrite
Beads
＋150µF
VBUS
D+
D-
GND
USB
Port
Data
Data
Single-Port Self-Powered USB Hub Application
Function Block Diagrams
EN
Clock
Gate Control
IN
BandGap
Reference
UVLO
Overcurrent
Limiting
CMP
Current
Sense
OUT
FLG
GND
Thermal Sense
Ver: 1.2
May 17, 2005
TEL: 886-3-5788833
http://www.gmt.com.tw
5
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet G528.PDF ] | |
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