AAT4625
USB Single-Channel Power Switch
General Description
The AAT4625 SmartSwitch™ is part of
AnalogicTech's Application Specific Power
MOSFET™ (ASPM™) product family. It is a 1.0A
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 AAT4625 is also protected from thermal over-
load which limits power dissipation and junction
temperatures. The current limit threshold is factory
programmed at 1.5A, with a maximum of 2.0A. The
quiescent supply current is typically a low 16µA. In
shutdown mode, the supply current decreases to
less than 1µA.
The AAT4625 is available in 8 pin SOP or TSSOP
and is specified over a -40 to 85°C temperature
range.
The AAT4600 Series is a family of adjustable and
fixed SmartSwitch™ products with a range of cur-
rent handling capabilities. Single versions with
adjustable current limit (AAT4601) or fixed current
limit (AAT4625) as well as dual versions with fixed
current limit (AAT4626) are available.
Features
•
•
•
•
•
•
SmartSwitch
™
•
•
•
•
•
•
Compliant with USB 1.1 and 2.0 specifications
2.7V to 5.5V Input voltage range
1.0A minimum continuous current
2.0A maximum current limit
60mΩ typical R
DS(ON)
Low quiescent current
• Typically 16µA
• 1µA max with Switch off
Thermal shutdown
Fault flag with 10ms blanking
Undervoltage Lockout
Temp range -40 to 85°C
UL Approved—File No. E217765
8 pin SOP or TSSOP package
Preliminary Information
Applications
•
•
•
•
USB ports and peripherals
Notebook computers
Hot swap supplies
General purpose power switching
UL Recognized Component
Typical Application
V
CC
5.0V
100k
2
1
7
6
IN
OUTPUT
OUT
AAT4625
FLG
EN (EN)
3
OUT
8
EN (EN)
0.1µF
120µF
GND
GND
4625.2002.1.0.93
1
AAT4625
USB Single-Channel Power Switch
Pin Descriptions
Pin #
1
Symbol
EN (EN)
Function
Enable Input: 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 Output: Active-low, open-drain output. Indicates over current,
UVLO and thermal shutdown.
Ground connection
Not internally connected.
Switch Output: These pins are the P-channel MOSFET drain connection.
Supply Input: This pin is the P-channel MOSFET source connection. Also
supplies the IC's internal circuitry.
2
3
4,5
6,8
7
FLG
GND
NC
OUT
IN
Pin Configuration
SOP-8
(Top View)
TSSOP-8
(Top View)
EN (EN)
FLG
GND
NC
OUT
IN
OUT
NC
EN (EN)
FLG
GND
NC
1
2
8
7
3
4
6
5
OUT
IN
OUT
NC
1
1
2
2
2
4625.2002.1.0.93
AAT4625
USB Single-Channel Power Switch
Absolute Maximum Ratings
Symbol
V
IN
V
FLG
I
FLG
V
OUT
I
OUT
V
EN
T
S
T
LEAD
(T
A
=25°C unless otherwise noted)
Value
-0.3 to 6
-0.3 to 6
50
-0.3 to V
IN
+0.3
2.0
-0.3 to 6
150
300
Description
IN to GND
FLG to GND
FLG Current
OUT to GND
Output Current (Internally Limited)
EN to GND
Storage Temperature
Maximum Soldering Temperature (at Leads)
Units
V
V
mA
V
A
V
°C
°C
Note: Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. Functional operation at con-
ditions other than the operating conditions specified is not implied. Only one Absolute Maximum rating should be applied at any one time.
Thermal Information
Symbol
Θ
JA
P
D
Description
Maximum Thermal Resistance (SOP-8)
1
Maximum Power Dissipation (SOP-8)
1
Value
100
1.25
Units
°C/W
W
Note 1: Mounted on an FR4 printed circuit board.
(V
IN
= 5V, T
A
= -40 to 85°C unless otherwise noted. Typical values
are at T
A
=25°C;
bold
values designate full temperature range)
Symbol
V
IN
I
Q
I
Q(OFF)
V
EN-THRSH
I
EN
C
EN
R
ds(ON)
T
ON
T
ON-RISE
T
OFF
T
OFF-FALL
I
SD(OFF)
I
LIMIT
OTMP
R
FLG
I
SINK
V
UVLO
T
BLANK
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Electrical Characteristics
Description
Operation Voltage
Quiescent Current
Off Supply Current
Enable Input Threshold
Enable Input Current
Enable Input Capacitance
On-Resistance
Output Turn-On Delay
Output Turn-On Rise Time
Output Turn-Off Delay
Output Turn-Off Fall Time
Output Leakage Current
Current Limit Threshold
Conditions
V
IN
=5V, EN=active
V
IN
=5.5V, EN (EN)=inactive
Low-to-high transition
High-to-low transition
V
EN
= 0V to 5.5V
V
IN
=5V, T
A
= 25°C
V
IN
=3.0V, T
A
= 25°C
V
IN
=5V, R
L
=10Ω
V
IN
=5V, R
L
=10Ω
V
IN
=5V, R
L
=10Ω
V
IN
=5V, R
L
=10Ω
EN=inactive, V
IN
=5.5V, V
OUT
=0V
ramped load applied to enable
output, V
OUT
< 4.0V
T
J
increasing
T
J
decreasing
V
IN
=5V, I
L
= 1mA
V
FLG
= 5.5V
V
IN
= increasing, 1% hysteresis
Min
2.7
Typ
16
Max
5.5
30
1
2.4
1
100
115
Units
V
µA
µA
V
V
µA
pF
mΩ
mΩ
ms
ms
µs
µs
µA
A
°C
°C
Ω
µA
V
ms
0.8
0.01
1
60
70
0.25
0.2
5
0.03
1.5
125
115
30
0.05
2.3
10
1.0
20
20
15
2.0
Over Temperature Shut Down
Error Flag Output Resistance
Error Flag Off Current
Under voltage Lockout
FAULT blanking
2.0
1
2.7
3
AAT4625
USB Single-Channel Power Switch
Typical Characteristics
(Unless otherwise noted, V
IN
= 5V, T
A
= 25°C)
Quiescent Current vs. Temperature
Quiescent Current (µA)
30
25
20
15
10
5
0
-40
-20
0
20
40
60
80
100
120
20
18
16
Quiescent Current
Input (µA)
14
12
10
8
6
4
2
0
0
1
2
3
4
5
6
Temperature (°C)
Input (V)
Current Limit
1.8
1.6
Off-Supply Current vs. Temperature
1.0000
Output (A)
1.4
1.2
1
0.8
0.6
0.4
0.2
0
0
1
2
3
4
5
Off-Supply Current (µA)
0.1000
0.0100
0.0010
-40
-20
0
20
40
60
80
100
120
Output (V)
Temperature (°C)
Off-Switch Current vs. Temperature
1.0000
Turn-ON/OFF Response with 10
Ohm 1µF load
Off-Switch Current (µA)
0.1000
EN (5V/div)
0.0100
0.0010
FAULT
Vout (2V/div)
0.0001
0.0000
-40
-20
0
20
40
60
80
100
120
Iin (200mA/div)
µ
4
4625.2002.1.0.93
AAT4625
USB Single-Channel Power Switch
(Unless otherwise noted, V
IN
= 5V, T
A
= 25°C)
Start Into 1 Ohm load
Thermal Shutdown Response
EN (5V/div)
EN (5V/div)
FAULT (5V/div)
Vout (1V/div)
Iin (500mA/div)
50ms / div
FAULT (5V/div)
Vout (1V/div)
Iin (500mA/div)
1ms/div
Short Circuit Through 0.3 Ohm
8
12
8
Short Circuit Through 0.6 Ohm
9
Input and Output (V)
Input and Output (V)
Output (A)
4
Output Current
Output Voltage
4
4
Output Current
Output Voltage
3
2
0
2
0
0
-1
0
1
2
3
4
5
-4
0
-1
0
1
2
3
4
5
-3
Time (µs)
Time (µs)
R
ds(ON)
vs. Temperature
80.0
75.0
70.0
65.0
60.0
55.0
50.0
45.0
40.0
-40
-20
0
20
40
60
80
100
120
V
CC
=3V
V
CC
=5V
Temperature (°C)
4625.2002.1.0.93
Output (A)
6
Input Voltage
8
6
Input Voltage
6
5
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