G528AP1UF [GMT]
USB High-Side Power Switch Advance Information; USB高侧电源开关超前信息
| 型号： | G528AP1UF |
| 厂家： | 
GLOBAL MIXED-MODE TECHNOLOGY INC |
| 描述： | USB High-Side Power Switch Advance Information |
| 文件： | 总8页 (文件大小：195K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Global Mixed-mode Technology Inc.
G528/G528A
USB High-Side Power Switch Advance Information
Features
General Description
The G528/G528A is an integrated high-side power
switch optimized for self-powered and bus-powered
Universal Serial Bus (USB) applications.
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.
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.
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
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
ORDER NUMBER
TEMP.
RANGE
ENABLE
PACKAGE
(Pb free)
G528P1Uf
G528AP1Uf
Active Low
Active High
-40°C to +85°C
-40°C to +85°C
SOP-8
SOP-8
Note: P1: SOP-8L
U: Tape & Reel
Pin Configuration
G528/G528A
1
2
8
7
OUT
OUT
OUT
FLG
GND
IN
IN
3
4
6
5
EN
(EN)
SOP-8
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver: 1.2
May 17, 2005
1
Global Mixed-mode Technology Inc.
G528/G528A
Absolute Maximum Ratings
Operating Ratings
Supply Voltage (VIN)..…………….….………...…..+6.0V
Fault Flag Voltage (VFLG)..…………..……...……..+6.0V
Fault Flag Current (IFLG)……………………………50mA
Output Voltage (VOUT)..…………………………….+6.0V
Output Current (IOUT).…………………Internally Limited
Enable Input (V EN )………………..…………-0.3V to 6V
Storage Temperature (TS)….………...-65°C to +150°C
Reflow Temperature (soldering, 10sec)……..….260°C
ESD protection*………………..…………….…….…2kV
Supply Voltage (VIN).……………………….+3V to +5.5V
Operating Temperature (TA)…………….-40°C to +85°C
Thermal Resistance
SOIC (θJA)……………………………………160°C/W
Electrical Characteristics (VIN=+5V; TA=25°C.)
PARAMETER
IN Supply Current
CONDITION
MIN
---
---
---
0.8
---
---
---
---
---
---
---
---
---
---
1.0
2.0
---
---
---
---
---
---
---
TYP
1
MAX
5
UNIT
µA
µA
V
**switch off, OUT = open
**switch on, OUT = open
low to high transition
100
---
160
2.5
---
EN Enable Threshold
high to low transition **
---
V
V
V
EN = VOH(min) = 2.5V
EN = VOL(max) = 1.0V
0.01
0.01
1
1
µA
µA
pF
mΩ
mΩ
ms
ms
µs
µs
µA
A
EN Input Current
1
---
EN Input Capacitance
Switch Resistance
VIN = 5V, IOUT = 500mA
VIN = 3.3V, IOUT = 500mA
RL = 10Ω
110
130
0.03
0.5
1
140
180
---
OUT Turn-On Delay
OUT Turn-On Rise Time
OUT Turn-Off Delay
OUT Turn-Off Fall Time
OUT Leakage Current
Short Circuit Current Limit
Circuit Limit Threshold
Overtemperature Shutdown
Threshold
RL = 10Ω, CL=100µF
RL = 10Ω
---
20
20
10
2.0
3.5
---
RL = 10Ω
1
1
Enable into load
1.4
2.7
135
125
10
Ramped load applied to enabled output
TJ increasing
A
°C
°C
Ω
TJ decreasing
---
VIN = 5V, IL=10mA
VIN = 3.3V, IL =10mA
VFLAG = 5V
25
40
1
FLG Output Resistance
FLG Off Current
15
Ω
0.01
2.5
2.3
µA
V
VIN = increasing
---
UVLO Threshold
VIN = decreasing
---
V
* Devices are ESD protected, however, handling precautions are recommended.
** For the G528/G528A, off is ≥ 2.5V and on is ≤ 0.8V. The enable input, EN has approximately 200mV of hys-
teresis.
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver: 1.2
May 17, 2005
2
Global Mixed-mode Technology Inc.
Typical Performance Characteristics
(VIN= 5V, TA=25°C, G528A, unless otherwise noted.)
G528/G528A
Flag Delay After OC
IOUT Ramp Chart
Output Turn-On Delay
Output Turn-Off Delay
Power Up (UVLO)
Power Down (UVLO)
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver: 1.2
May 17, 2005
3
Global Mixed-mode Technology Inc.
Typical Performance Characteristics
(VIN= 5V, TA=25°C, G528A, unless otherwise noted.)
G528/G528A
Turn-On Characteristics
Turn-On Characteristics
Turn-On Characteristics
Turn-On Characteristics
Short Circuit Response
(Short Applied to Output)
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver: 1.2
May 17, 2005
4
Global Mixed-mode Technology Inc.
Pin Description
G528/G528A
PIN
NAME
PIN FUNCTION
G528 G528A
1
2,3
4
1
GND
IN
Ground.
Input Supply: Output MOSFET source, which also supplies IC's internal circuitry. Connect to
positive supply.
2,3
EN
EN
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.
4
5
5
FLG
OUT
6,7,8
6,7,8
Switch Output: Output MOSFET drain. Typically connect to switched side of load.
Typical Applications
VCC
5.0V
10K
Upstream
VBUS
100mA max.
Ferrite
Beads
100K
G528
G911
IN
3.3 V USB Controller
VBUS
V
BUS
EN OUT
ON/OFF
OC
GND
VIN
OUT
D+
D-
D
D
+
＋
150µF
FLG
1µF
USB
Port
GND
1µF
－
IN
GND
GND
GND
0.1µF
Data
Data
Single-Port Self-Powered USB Hub Application
Function Block Diagrams
IN
EN
Clock
Gate Control
BandGap
Reference
Overcurrent
Limiting
Current
Sense
CMP
OUT
FLG
UVLO
GND
Thermal Sense
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver: 1.2
May 17, 2005
5
Global Mixed-mode Technology Inc.
G528/G528A
Switch Enabled into Heavy Load
Functional Description
The G528/G528A is high-side 1-channel switch with
active-low enable input. Fault conditions turn off or
inhibit turn-on of the output transistors.
If the switch is powered on or enabled into a heavy
load or short-circuit, the switch immediately goes into
a constant-current mode, reducing the output voltage.
See the "Enable into Short Circuit" graph.
Input and Output
Heavy Load Applied to Enabled Switch
IN (input) is the power supply connection to the logic
circuitry and the source of the output MOSFET. OUT
(output) is the drain of the output MOSFET. In a typical
application, current flows through the switch from IN to
OUT toward the load. All OUT pins must be connected
together to the load.
When a heavy load is applied, a large current may
flow from the switch. The current limit circuit may shut
the switch off briefly, then fold back into con-
stant-current mode. See the “Short Applied to Output”
graph and the "Ramped Load to Enable Device"
graph.
The output MOSFET and driving circuit are also de-
signed to allow the MOSFET drain to be externally
forced to a higher voltage than the source (VOUT > VIN)
when the switch is off. In this situation, the
G528/G528A avoids undesirable drain-to-body diode
current flow by connecting the body to the most posi-
tive voltage. If VOUT >VIN when switch is enabled, cur-
rent will flow from VOUT to VIN.
Fault Flag
FLG is a 2-channel, open-drain MOSFET output.
Thefault-flag is active (low) for one or more of the fol-
lowing conditions: current limiting, undervoltage, or
thermal shutdown. The flag output MOSFET is capa-
ble of sinking a 10mA load to typically 100mV above
ground.
Thermal Shutdown
Applications Information
Thermal shutdown protects G528/G528A from exces-
sive power dissipation. If the die temperature exceeds
135°C, the MOSFETS switch is shut off. 10°C of hys-
tersis prevents the switch from turning on until the die
temperature drops to 125°C. Thermal shutdown circuit
functions only when the switch is enabled.
Supply filtering
A 0.1µF to 1µF bypass capacitor from IN to GND as
shown in Figure 1, located near the G528/G528A, is
strongly recommended to control supply transients.
Without a bypass capacitor, an output short may
cause sufficient ringing on the input (from supply lead
inductance) to damage internal control circuitry.
Undervoltage Lockout
UVLO (undervoltage lockout) prevents the output
MOSFET from turning on until IN (input voltage) ex-
ceeds 2.5V typically. After the switch turns on, if the
voltage drops below 2.3V typically, UVLO shuts off the
output MOSFET. UVLO detection functions only when
the switch is enabled.
Input transients must not exceed the absolute maxi-
mum supply voltage (VIN max = 6V) even for a short du-
ration.
3.0V to 5.5V
G528
Current Sensing and Limiting
The current limit threshold is preset internally. The
preset level prevents damage to the output MOSFET
and external load but allows a minimum current of
0.5A through the output MOSFET.
IN
OUT
0.1 µF to 1 µF
off
EN
A current sense circuit senses the output current of
MOSFET switch. If output current exceeds the current
limit threshold, the output MOSFET switch is shut off.
The reaction to an overcurrent is measured with the
following scenarios:
on
GND
Figure 1. Supply Bypassing
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver: 1.2
May 17, 2005
6
Global Mixed-mode Technology Inc.
G528/G528A
USB
Controller
G528
VBUS
EN
FLG
OUT
IN
USB Host
GND
Capacitive
Load
CBULK
0.1 4.7
µF µF
GND
Downstream USB Device
Bus Powered Hub
Cable
Cable
Figure 2. Soft Start
USB
Controller
G528
IN
OUT
VBUS
0.1
µF
USB
Function
4.7
µF
EN
USB Hub
GND
CBULK
GND
USB Peripheral
Cable
Figure 3. Inrush Current-Limit Application
results from charging a capacitive load, satisfying the
EN , the active-low enable Input
USB voltage drop requirements, for bus-powered
applications as shown in Figure 2.
EN , with 0.2V hysteresis, must be driven logic high or
logic low for a clearly defined input. Floating the input
The soft start circuit shown in Figure 3 can be utilized
to meet USB transient regulation specifications with
large load capacitances (CBULK >10µF). The
G528/G528A will provide inrush current limiting for
these applications.
may cause unpredictable operation. EN should not
be allowed to go negative with respect to GND.
Soft Start
The G528/G528A is high impedance when off and
slowly becomes a low impedance as it turns on. This
reduces inrush current and related voltage drop that
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver: 1.2
May 17, 2005
7
Global Mixed-mode Technology Inc.
Package Information
G528/G528A
C
H
E
L
D
θ
7 ° (4X)
A2
A1
A
y
e
B
Note:
1. Package body sizes exclude mold flash and gate burrs
2. Dimension L is measured in gage plane
3. Tolerance 0.10mm unless otherwise specified
4. Controlling dimension is millimeter converted inch dimensions are not necessarily exact.
DIMENSION IN MM
DIMENSION IN INCH
SYMBOL
MIN.
1.35
0.10
----
NOM.
1.60
---
MAX.
1.75
0.25
---
MIN.
0.053
0.004
---
NOM.
0.063
---
MAX.
0.069
0.010
---
A
A1
A2
B
1.45
---
0.057
---
0.33
0.19
4.80
3.80
-----
5.80
0.40
-----
0º
0.51
0.25
5.00
4.00
----
0.013
0.007
0.189
0.150
---
0.020
0.010
0.197
0.157
---
C
D
E
---
---
---
---
---
---
e
1.27
---
0.050
---
H
L
6.20
1.27
0.10
8º
0.228
0.016
---
0.244
0.050
0.004
8º
----
----
----
---
y
θ
---
0º
---
Taping Specification
PACKAGE
Q’TY/REEL
2,500 ea
SOP-8
Feed Direction
Typical SOP Package Orientation
GMT Inc. does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and GMT Inc. reserves the right at any time without notice to change said circuitry and specifications.
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver: 1.2
May 17, 2005
8
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