Global Mixed-mode Technology Inc.
G528/G528A
USB High-Side Power Switch Advance Information
Features
Typical 110m惟, Low MOSFET on resistance, at
5.0V
3.0V to 5.5V operating range
100 碌A(chǔ) typical on-state supply current
1碌A(chǔ) 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
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.
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
Ordering Information
ORDER
NUMBER
G528P1U
G528AP1U
Note: P1: SOP-8L
U: Tape & Reel
ORDER NUMBER
(Pb free)
G528P1Uf
G528AP1Uf
ENABLE
Active Low
Active High
TEMP.
RANGE
-40擄C to +85擄C
-40擄C to +85擄C
PACKAGE
SOP-8
SOP-8
Pin Configuration
G528/G528A
GND
IN
IN
1
2
3
8
7
6
5
OUT
OUT
OUT
FLG
EN 4
(EN)
SOP-8
Ver: 1.2
May 17, 2005
TEL: 886-3-5788833
http://www.gmt.com.tw
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