Analogic AAT4626IHS-T1 Usb dual-channel power switch Datasheet

PRODUCT DATASHEET
AAT4626
SmartSwitchTM
USB Dual-Channel Power Switch
General Description
Features
The AAT4626 SmartSwitch is part of AnalogicTech’s
Application Specific Power MOSFET™ (ASPM™) product
family. It is a dual-channel 500mA current-limited
P-channel MOSFET power switch designed for high-side
load switching applications. This switch operates with
inputs ranging from 2.7V to 5.5V, making it ideal for both
3V and 5V systems. An integrated current-limiting circuit
protects the input supply against large changes in load
current which may cause the supply to fall out of regulation. The AAT4626 is also protected from thermal overload which limits power dissipation and junction temperatures. The current limit threshold is factory programmed at 1.0A, with a maximum of 1.5A. The quiescent supply current is typically a low 20μA. In shutdown
mode, the supply current decreases to less than 1μA.
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The AAT4626 is available in a Pb-free, 8-pin SOP or
TSSOP package and is specified over the -40°C to +85°C
temperature range.
The AAT4600 series is a family of adjustable and fixed
SmartSwitch products with a range of current handling
capabilities. Single versions are available with adjustable
current limit (AAT4601) or fixed current limit (AAT4625),
as well as dual versions with fixed current limit
(AAT4626).
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2.7V to 5.5V Input Voltage Range
Compliant to USB 1.1 and 2.0 Specifications
500mA (Min) Continuous Current per Channel
1.25A (Max) Current Limit per Channel
90mΩ Typical RDS(ON)
Low Quiescent Current:
▪ Typically 20μA
▪ 1μA Max with Switches Off
Thermal Shutdown
Slew Rate Limited Turn On
Fault Flag with 2ms Blanking
Under-Voltage Lockout
Temperature Range: -40°C to +85°C
UL Approved—File No. E217765
8-Pin SOP or TSSOP Package
Applications
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General-Purpose Power Switching
Hot Swap Supplies
Notebook Computers
USB Ports and Peripherals
UL Recognized Component
Typical Application
100kΩ
100kΩ
VCC 5.0V
7
ENA
(ENA)
ENB
0.1μF
(ENB)
1
4
IN
FLGA
ENA
(ENA)
AAT4626
OUTA
ENB
(ENB)
FLGB
GND
OUTB
2
3
OUTPUTA
8
OUTPUTB
5
6
47μF
GND
4626.2008.02.1.3
47μF
GND
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1
PRODUCT DATASHEET
AAT4626
SmartSwitchTM
USB Dual-Channel Power Switch
Pin Descriptions
Pin #
Symbol
Function
2,3
5, 8
6
EN(A/B)
(EN(A/B))
FLG(A/B)
OUT(A/B)
GND
7
IN
Enable inputs: logic-compatible enable input. High input > 2.1V typical. Low input < 1.9V typical. Active high
or active low option available; see Ordering Information for details.
Fault flag outputs: active-low, open-drain output. Indicates over-current, UVLO, and thermal shutdown.
Switch outputs: these pins are the P-channel MOSFET drain connection.
Ground connection.
Supply input: this pin is the source connection for the P-channel MOSFETs. Also supplies the IC’s internal
circuitry.
1, 4
Pin Configuration
SOP-8
(Top View)
FLGA
2
FLGB
3
ENB (ENB)
2
4
2
1
1
ENA (ENA)
TSSOP-8
(Top View)
8
OUTA
7
IN
6
GND
5
OUTB
ENA (ENA)
1
8
OUTA
FLGA
2
7
IN
FLGB
3
6
GND
ENB (ENB)
4
5
OUTB
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4626.2008.02.1.3
PRODUCT DATASHEET
AAT4626
SmartSwitchTM
USB Dual-Channel Power Switch
Absolute Maximum Ratings1
TA = 25°C, unless otherwise noted.
Symbol
VIN
VFLG
IFLG
VOUT
IOUT
VEN
TJ
TS
TLEAD
Description
IN to GND
FLGA, FLGB to GND
FLGA, FLGB Current
OUTA, OUTB to GND
Output Current
EN (EN) to GND
Operating Junction Temperature Range
Storage Temperature
Maximum Soldering Temperature (at Leads)
Value
Units
-0.3 to 6
-0.3 to 6
50
-0.3 to VIN + 0.3
Internally Limited
-0.3 to 6
-40 to 150
150
300
V
V
mA
V
A
V
°C
°C
°C
Value
Units
100
1.25
°C/W
W
Thermal Information2
Symbol
ΘJA
PD
Description
Maximum Thermal Resistance (SOP-8)
Maximum Power Dissipation (SOP-8)
1. Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. Functional operation at conditions other than the operating conditions
specified is not implied. Only one Absolute Maximum Rating should be applied at any one time.
2. Mounted on an FR4 printed circuit board with 1 oz. copper ground plane.
4626.2008.02.1.3
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3
PRODUCT DATASHEET
AAT4626
SmartSwitchTM
USB Dual-Channel Power Switch
Electrical Characteristics
VIN = 5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = 25°C; bold values designate full
temperature range.
Symbol
IQ
VIN-THRSH
IEN
CEN
4
Description
Conditions
Quiescent Current
VIN = 5V, ENA and ENB Active
Low-to-High Transition
High-to-Low Transition
VEN = 0V to 5.5V
Enable Input Threshold
Enable Input Current
Enable Input Capacitance
RDS(ON)
On-Resistance
TON
TON-RISE
TOFF
TOFF-FALL
ISD(OFF)
ILIMIT
Output Turn-On Delay
Output Turn-On Rise Time
Output Turn-Off Delay
Output Turn-Off Fall Time
Output Leakage Current
Current Limit Threshold
OTMP
Over-Temperature Shutdown
RFLG
ISINK
VUVLO
TBLANK
Error Flag Output Resistance
Error Flag Off Current
Under-Voltage Lockout
Fault Blanking
VIN = 5V, Each Switch, TA = 25°C
VIN =3.0V, Each Switch, TA = 25°C
VIN = 5V, RL = 10Ω
RL = 10Ω
VIN = 5V, RL = 10Ω
RL = 10Ω
EN = Inactive, VIN = 5.5V, VOUT = 0V
Ramped Load Applied to Enable Output, VOUT < 4.0V
TJ Increasing
TJ Decreasing
VIN = 5V, IL = 1mA
VFLG = 5.5V
VIN = Increasing, 1% Hysteresis
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Min
Typ
Max
Units
20
40
2.4
μA
1
μA
pF
0.8
0.01
1
90
100
0.25
0.2
5
0.75
2.0
0.03
1.0
125
115
30
0.05
2.3
2
130
150
20
20
1
1.50
V
mΩ
ms
ms
μs
μs
μA
A
°C
1
2.7
Ω
μA
V
ms
4626.2008.02.1.3
PRODUCT DATASHEET
AAT4626
SmartSwitchTM
USB Dual-Channel Power Switch
Typical Characteristics
Unless otherwise noted, VIN = 5V, TA = 25°C.
Quiescent Current
25
30
Input Current (μA)
Quiescent Current (μA)
Quiescent Current vs. Temperature
25
20
15
10
5
0
20
2 channels enabled
15
10
1 channel enabled
5
0
-40
-20
0
20
40
60
80
100
120
0
1
2
Temperature (°C)
Current Limit
5
6
1.0000
Off-Switch Current (μA)
Output Current (A)
4
Off-Supply Current vs. Temperature
1.4
1.2
1
0.8
0.6
0.4
0.2
0.1000
0.0100
0.0010
0
0
1
2
3
4
-40
5
-20
0
20
40
60
80
100
120
100
120
Temperature (°C)
Output Voltage (V)
Off-Switch Current vs. Temperature
RDS(ON) vs. Temperature
1.0000
140.0
(Both switches)
130.0
0.1000
RDS(ON) (mΩ)
Off-Switch Current (μA)
3
Input Voltage (V)
0.0100
0.0010
120.0
110.0
VIN = 3V
100.0
90.0
VIN = 5V
80.0
70.0
0.0001
60.0
-40
0.0000
-40
-20
0
20
40
60
80
100
120
-20
0
20
40
60
80
Temperature (°C)
Temperature (°C)
4626.2008.02.1.3
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PRODUCT DATASHEET
AAT4626
SmartSwitchTM
USB Dual-Channel Power Switch
Typical Characteristics
Unless otherwise noted, VIN = 5V, TA = 25°C.
Turn-On/Off Response with
10Ω, 1μF Load
Start Into 1Ω Load
EN (5V/div)
EN (5V/div)
FAULT (5V/div)
FAULT (5V/div)
VOUT (1V/div)
VOUT (1V/div)
IIN (500mA/div)
IIN (500mA/div)
Time (200μs/div)
Time (100μs/div)
Thermal Shutdown Response
Short Circuit Through 0.3Ω
EN (5V/div)
FAULT (5V/div)
VOUT (1V/div)
IIN (500mA/div)
12
Input Voltage
6
4
8
4
Output Current
2
Output (A)
Input and Output (V)
8
0
Output Voltage
0
-4
-1
0
1
2
3
4
5
Time (100ms/div)
Time (μs)
6
4
2
Input Voltage
6
Output Current
3
0
Output Voltage
Output (A)
Input and Output (V)
Short Circuit Through 0.6Ω
-3
0
-1
0
1
2
3
4
5
Time (μs)
6
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4626.2008.02.1.3
PRODUCT DATASHEET
AAT4626
SmartSwitchTM
USB Dual-Channel Power Switch
Functional Block Diagram
OUTA
IN
OverTemperature
Protection
OUTB
UnderVoltage
Lockout
ENB (ENB)
ENA (ENA)
1.2V
Reference
Current
Limit
Over-Temp Protection
Under-Voltage Lockout
FLGA
Current Limit
Over-Temp Protection
Under-Voltage Lockout
FLGB
Current Limit
Functional Description
The AAT4626 is a dual integrated MOSFET load switch
with a fixed level current limit, over-temperature protection, level shifted inputs, and a fault flag for each switch.
The current limit control is combined with an over-temperature thermal limit circuit to provide a comprehensive
system to protect the load switch under short-circuit or
other adverse operating conditions. The AAT4626 is ideally suited for control and protection of peripheral ports
such as USB, RS232, and parallel ports.
The current limit and over-temperature circuits will act
independently. The device current limit is activated when
the output load current exceeds a preset internal threshold level. The minimum current limit threshold characteristic is specified by ILIM(MIN). If the load switch ambient
temperature becomes excessive or if a short-circuit condition persists, the die temperature will rise, causing the
over-temperature protection circuit to activate.
If the current limit or over-temperature protection circuits are active for more than ten milliseconds, the sys-
4626.2008.02.1.3
tem will be informed via the FAULT flag. The ten millisecond fault blanking delay allows the AAT4626 to be turned
on into large capacitive loads without activating the
FAULT flags. The open drain FAULT outputs can be connected directly to system controllers driven by voltage
levels less than the IN pin voltage without additional
level shifting circuitry.
Each of the two load switches is turned on and off by
applying a logic level signal to the EN(A/B) pin. The
AAT4626 enable function is available in both active high
and active low logic level versions. The AAT4626 typically consumes 20μA when operating; when off, the
device draws less than 1μA. In the off state, current is
prevented from flowing between the input and output on
each respective channel. The EN(A/B) function has logic
level thresholds that allow the AAT4626 to be TTL compatible and may also be controlled by 2.5V to 5.0V CMOS
circuits. The voltage level on either EN(A/B) or FAULT(A/B)
should not exceed the input supply level present on the
IN pin.
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7
PRODUCT DATASHEET
AAT4626
SmartSwitchTM
USB Dual-Channel Power Switch
Applications Information
Eq. 2: IMAX =
Operation in Current Limit
If an excessive load is applied to either output of an
AAT4626, the load current will be limited by the device’s
current limit circuitry. Refer to the “Current Limit” curve in
the Typical Characteristics section of this datasheet. If a
short circuit were to occur on the load applied to either the
A or B output, there would be a demand for more current
than what is allowed by the internal current limiting circuit
and the voltage at the device output will drop. This causes
the AAT4626 to dissipate more power than in normal
operation, causing the die temperature to increase. When
die temperature exceeds the internal over-temperature
threshold, the AAT4626 will shut down both the A and B
output channels. After shutting down, the AAT4626 cools
to a level below the over-temperature threshold, at which
point it will start up again. The AAT4626 will continue to
cycle off and on until one of the following events occurs:
the load current of the offending output is reduced to a
level below the AAT4626’s current limit setting; the input
power is removed; or the output is turned off by a logic
high level applied to the EN pin of the fault channel.
Thermal Considerations
Since the AAT4626 has internal current limit and overtemperature protection, junction temperature is rarely a
concern. If an application requires a large load current in
a high temperature operating environment, there is the
possibility that the over-temperature protection circuit
rather than the current limit circuit from one of the two
outputs will regulate the current available to the load. In
these applications, the maximum current available without risk of activation of the over-temperature circuit can
be calculated. The maximum internal temperature while
current limit is not active can be calculated using
Equation 1:
Eq. 1: TJ(MAX) = IMAX2 · RDS(ON)(MAX) · RΘJA + TA(MAX)
In Equation 1, IMAX is the maximum current required by
the load. RDS(ON)(MAX) is the maximum rated RDS(ON) of the
AAT4626 at high temperature. RθJA is the thermal resistance between the device die and the board onto which it
is mounted. TA(MAX) is the maximum ambient temperature
for the printed circuit board assembly under the AAT4626
when the load switch is not dissipating power. Equation 1
can be transformed to provide IMAX; Refer to Equation 2.
8
TSD(MIN) - TA(MAX)
RDS(ON)(MAX) · RΘJA
TSD(MIN) is the minimum temperature required to activate
the device over-temperature protection. The typical
thermal limit temperature specification is 125°C for the
AAT4626. For calculations, 115°C is a safe minimum
value to use.
For example, a portable device is specified to operate in a
50°C environment. The printed circuit board assembly will
operate at temperatures as high as 85°C. This portable
device has a sealed case and the area of the printed board
assembly is relatively small, causing RθJA to be approximately 100°C/W. RDS(ON)(MAX) = 130W. Using Equation 2,
Eq. 3: IMAX =
115°C - 85°C
= 1.25A
130W · 120°C/W
If this system requires less than 1.4A, the thermal limit
will not activate during normal operation.
Input Capacitor
The input capacitor serves two purposes. First, it protects the source power supply from transient current
effects generated by the application load circuits. If a
short circuit is suddenly applied to either output of an
AAT4626, there is a microsecond long period during
which a large current can flow before the current limit
circuit becomes active. Refer to the Typical Characteristics
curve “Short Circuit Through 0.3Ω." A properly sized
input capacitor can dramatically reduce the load switch
input transient response effects seen by the power supply and other circuitry upstream from the AAT4626.
The second purpose of the input capacitor is to prevent
transient events generated by the load circuits from
effecting the operation of the AAT4626. For example, if
an AAT4626 is used in a circuit that operates from a 5V
power supply with poor step load response, it is possible
that turning on the load switch could cause the input
power supply to droop below the AAT4626's under-voltage lockout threshold. This drop in voltage would cause
the AAT4626 to turn off until the input power supply
voltage levels recover. Since this cycle would be selfperpetuating, the entire circuit could be seen to be
unstable. In the very rare case where capacitor cost is
prohibitive and the input capacitor is omitted, the output
load circuit should be slew rate limited when turned on.
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4626.2008.02.1.3
PRODUCT DATASHEET
AAT4626
SmartSwitchTM
USB Dual-Channel Power Switch
Output Capacitor
In order to insure stability while the device current limit
is active, a small capacitance of approximately 1μF
should be used on each output. When either output of
the AAT4626 is activated using the EN(A/B) function,
there are no momentary current transients, as in the
case when a short circuit is suddenly applied to a device
that is already on. Refer to the Typical Characteristics
curve “Turn-On/Off Response.” Regardless of output
capacitor size, output current on either output is limited
to the value allowed by the threshold determined by the
internal current limiting circuitry. Refer to the internal
current limit threshold specifications stated in the
Electrical Characteristics section of this datasheet. This
permits very large output capacitors to be used.
For example, USB ports are specified to have at least
120μF of downstream capacitance from their controlling
power switch. An output capacitance as large as 1000μF
would not disturb the input power supply to an AAT4626
used to control a USB port.
If a fault flag delay greater than 10ms is required, addition delay may be added by use of an RC filter. As shown
in Figure 1, an RC filter can be added to the fault flag
output.
V+
USB Controller
EN Inputs
The AAT4626 has two enable inputs, ENA and ENB.
These two enable inputs allow the AAT4626 to independently control each respective output. The device is
available in both active high EN enable and active low
(EN) enable versions. For specific part numbers, refer to
the ordering information section. When both the A and
B outputs of the AAT4626 are in the off state, the
respective outputs are an open circuit and the device
quiescent current consumption is reduced to less than
1μA. The ENA and ENB threshold voltages are set to
allow the AAT4626 to be controlled by 5V TTL levels, as
well as CMOS-compatible levels ranging from 2.5V to 5V.
The ENA or ENB function control voltage levels should
not exceed the input supply level applied to the IN pin.
Fault Flag Output
The AAT4626 features an active low fault flag (FLGA and
FLGB) output for each A and B output channel. The fault
flags are provided to alert the system if the over-current
or over-temperature circuits become active, or if the
load switch is not receiving a sufficient voltage level to
properly operate. If either the current limit or overtemperature circuits in any combination are constantly
4626.2008.02.1.3
active for more than approximately ten milliseconds, the
FLG(A/B) pin is pulled to ground internally through an
open drain device. The 10ms delay on the fault function
is intended to prevent capacitive loads connected to one
of the load switch outputs from activating its respective
flag when the device is turned on. The placement of a
pull-up resistor between the FLGA or FLGB pin and the
IN pin is recommended. Reasonable values for the pullup resistor should range from 10kΩ to 100kΩ. Since the
fault flags are open drain terminals, they may be pulled
up to any voltage that is not greater than the level present on the IN pin. This is done to allow the AAT4626 to
signal ancillary circuitry that is powered by voltage levels less than the level on the IN pin.
Over-Current
Flag Input
100kΩ
R1
10kΩ
1
2
3
C1
0.1µF
4
AAT4626
ENA OUTA
FLGA
IN
FLGB GND
ENB OUTB
8
7
6
5
Figure 1: Fault Flag Delay RC Filter.
Reverse Voltage
The AAT4626 is designed to control current flowing from
IN to OUT. If a voltage is applied to OUT which is greater than that on IN, a large resulting reverse current may
flow, potentially damaging the AAT4626.
Under-Voltage Lockout
The AAT4626 has been designed with an under-voltage
lockout control circuit. The under-voltage lockout prevents the output MOSFET devices from turning on until
VIN exceeds the typical UVLO threshold of 2.3V. During
operation, the device will automatically shut down if VIN
falls below the UVLO threshold and the fault flags will be
toggled.
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9
PRODUCT DATASHEET
AAT4626
SmartSwitchTM
USB Dual-Channel Power Switch
Hot-Plug Applications
Refer to the following guidelines for power port PCB
layout:
Application circuit cards with a high inrush current potential can be limited by use of the AAT4626. The AAT4626
has both slew rate limited turn on characteristics and current limit controlled outputs, which make it ideally suited
for power port hot-plug applications. A host power back
plane or hot-plug receptacle may be sensitive to short
duration, high power surges. The AAT4626 will turn on in
a linear ramping fashion and regulate the inrush current
within the specified current limit for the device. The error
flag usually will not be affected during application turn-on
since the 10ms fault flag blanking time is intended for
these types of events. If an application turn-on current
surge exceeds 10ms, an RC delay filter may be added to
the flag output to prevent the system from receiving an
error during the start-up sequence.
1.
2.
3.
4.
5.
PCB Layout Information
In order to obtain the maximum performance from the
AAT4626, very careful attention must be considered in
regard to the printed circuit board layout. In most port
power switch and port protection applications, high voltage and current transient events will occur. Proper PCB
layout can help reduce the effects of transient events.
PCB trace resistance will effect overall circuit transient
response; small voltage drops will also be incurred.
Cable / Connector
to Hot-Plug Port
VBUS
1
2
CIN
4.7µF
Hot-Plug
Receptacle
Evaluation Board Layout
The AAT4626 evaluation layout follows the recommend
printed circuit board layout procedures and can be used
as an example for good application layouts. (See Figures
4, 5, and 6.) Note that ferrite beads are not used on this
simple device evaluation board. The board layout shown
is not to scale.
AAT4626
V+
3
4
ENA
OUTA
FLGA
IN
FLGB
GND
ENB
PCB traces should be kept as short and direct as possible to minimize the effects of the PCB on circuit
performance.
Make component solder pads large to minimize contact resistance.
The AAT4626 output bulk capacitors and ferrite
beads should be placed as close to the device as possible. PCB traces to the output connector should be
kept as short as possible to minimized trace resistance and the associated voltage drop (I2R loss).
If ferrite beads are used in the circuit, select ferrite
beads with a minimum series resistance.
The use of PCB trace vias should be avoided on all
traces that conduct high currents. If vias are necessary, make the vias as large as possible and use
multiple vias connected in parallel to minimize their
effect.
OUTB
8
0.1μF
Card
Application
Circuit A
7
6
5
CBULKA
(120µF)
CBULKB
(120µF)
GND
GND
Card
Application
Circuit B
Dual Channel
Inrush Current Protected
Application Card
Figure 2: AAT4626 Input Inrush Current Protected Dual Output Application.
10
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4626.2008.02.1.3
PRODUCT DATASHEET
AAT4626
SmartSwitchTM
USB Dual-Channel Power Switch
P-Channel MOSFET
Switch On Resistance
0.09Ω
(45mV)
Trace Resistance
0.01Ω
(5mV)
IN
V+
Input
Power Supply
4.50V to 5.25V
CBULK
GND
0.1µF
OUTA
AAT4626
Ch. A
Ferrite Bead
and PCB Trace
Resistance
0.02Ω
(10mV)
Cable, Connector
and Contact
Resistance
0.03Ω
(15mV)
VBUS
CBULK
0.1µF
GND
(5mV)
(10mV)
(15mV)
GND
Downstream
Peripheral Port
500mA Max.
Load Current
Total Voltage Drop = 75mV
Figure 3: Summary of Typical Circuit Voltage Drops Caused
by AAT4626 Circuit Components and PCB Trace Resistance.
Figure 4: AAT4626 Evaluation Board
Component Side Layout.
Figure 5: AAT4626 Evaluation Board
Solder Side Layout.
Figure 6: AAT4626 Evaluation Board Top Side
Silk Screen Layout /Assembly Drawing.
4626.2008.02.1.3
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11
PRODUCT DATASHEET
AAT4626
SmartSwitchTM
USB Dual-Channel Power Switch
Application Circuits
7
VBUS = 5.0V
IN
OUTA
Ferrite Beads
8
VBUS(A)
AAT4626
CIN
0.1µF
R1
100kΩ
COUT1
0.1µF
R2
100kΩ
D+
COUT2
120µF
DGND
USB Controller
1
On/Off A
2
3
Error Flag A
Error Flag B
4
On/Off B
ENA
DATA
(Port A)
FLGA
FLGB
ENB
OUTB
Ferrite Beads
5
VBUS(B)
COUT3
0.1µF
6
D+
COUT4
120µF
DGND
DATA
(Port B)
Figure 7: Typical Dual USB Host Port Application.
VCC
+5.0V
100kΩ
4.50V to 5.25V
Upstream V BUS
100mA Maximum
VBUS
AAT3200-3.3
IN
3.3V USB Controller
VIN
OUT
GND
D+
D-
1µF
GND
0.1µF
100kΩ
1µF
ON/OFF A
AAT4626
ENA
Over Current A
FLGA
Over Current B
FLGB
ON/OFF B
ENB
Ferrite Beads
VBUS(A)
OUTA
IN
USB Port A
120µF
0.1µF
GND
OUTB
GND
D+
DGND
Data
Ferrite Beads
USB Port B
VBUS(B)
120µF
0.1µF
D+
DGND
Data A/B
(Two Pair to
USB Controller)
Figure 8: Self-Powered Dual Port USB Hub.
12
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4626.2008.02.1.3
PRODUCT DATASHEET
AAT4626
SmartSwitchTM
USB Dual-Channel Power Switch
100kΩ
4.50V to 5.25V
Upstream V BUS
100mA Maximum
VBUS
AAT3200-3.3
IN
3.3V USB Controller
VIN
OUT
GND
D+
D-
1µF
GND
0.1µF
100kΩ
1µF
ON/OFF A
FLGA
IN
Over Current B
FLGB
GND
ENB
Ferrite Beads
OUTA
Over Current A
ON/OFF B
GND
USB Port A
AAT4626
ENA
120µF
0.1µF
OUTB
VBUS(A)
D+
DGND
Data A
USB Port B
Data
Ferrite Beads
120µF
0.1µF
VBUS(B)
D+
DGND
Data B
Figure 9: USB Bus Powered Dual Port USB Hub.
4626.2008.02.1.3
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13
PRODUCT DATASHEET
AAT4626
SmartSwitchTM
USB Dual-Channel Power Switch
Ordering Information
Package
Enable
Marking
Part Number (Tape and Reel)1
SOP8
SOP8
TSSOP8
TSSOP8
EN (Active-high)
EN (Active-low)
EN (Active-high)
EN (Active-low)
4626-1
4626
4626-1
4626
AAT4626IAS-1-T1
AAT4626IAS-T1
AAT4626IHS-1-T1
AAT4626IHS-T1
All AnalogicTech products are offered in Pb-free packaging. The term “Pb-free” means semiconductor
products that are in compliance with current RoHS standards, including the requirement that lead not exceed
0.1% by weight in homogeneous materials. For more information, please visit our website at
http://www.analogictech.com/about/quality.aspx.
Package Information
6.00 ± 0.20
3.90 ± 0.10
SOP-8
4.90 ± 0.10
0.42 ± 0.09 × 8
1.27 BSC
45°
4° ± 4°
0.175 ± 0.075
1.55 ± 0.20
0.375 ± 0.125
0.235 ± 0.045
0.825 ± 0.445
All dimensions in millimeters.
1. Sample stock is generally held on part numbers listed in BOLD.
14
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4626.2008.02.1.3
PRODUCT DATASHEET
AAT4626
SmartSwitchTM
USB Dual-Channel Power Switch
6.40 ± 0.20
4.40 ± 0.10
TSSOP-8
12° REF × 4
3.00 ± 0.10
1.05 MAX
0.245 ± 0.055 × 8
1.20 MAX
0.65 BSC
0.145 ± 0.055
4° ± 4°
0.60 ± 0.15
0.10 ± 0.05
12°
1.00
REF
DETAIL A
All dimensions in millimeters.
Advanced Analogic Technologies, Inc.
3230 Scott Boulevard, Santa Clara, CA 95054
Phone (408) 737-4600
Fax (408) 737-4611
© Advanced Analogic Technologies, Inc.
AnalogicTech cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in an AnalogicTech product. No circuit patent licenses, copyrights, mask work rights, or other intellectual
property rights are implied. AnalogicTech reserves the right to make changes to their products or specifications or to discontinue any product or service without notice. Except as provided in AnalogicTech’s terms and
conditions of sale, AnalogicTech assumes no liability whatsoever, and AnalogicTech disclaims any express or implied warranty relating to the sale and/or use of AnalogicTech products including liability or warranties
relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual property right. In order to minimize risks associated with the customer’s applications, adequate
design and operating safeguards must be provided by the customer to minimize inherent or procedural hazards. Testing and other quality control techniques are utilized to the extent AnalogicTech deems necessary to
support this warranty. Specific testing of all parameters of each device is not necessarily performed. AnalogicTech and the AnalogicTech logo are trademarks of Advanced Analogic Technologies Incorporated. All other
brand and product names appearing in this document are registered trademarks or trademarks of their respective holders.
4626.2008.02.1.3
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15
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