AAT4610
Current Limited Load Switch in SOT-23 Package
General Description
The AAT4610 SmartSwitch™ is a member of
AnalogicTech's Application Specific Power
MOSFET™ (ASPM™) product family. It is a 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, mak-
ing it ideal for both 3V and 5V systems. An inte-
grated current-limiting circuit protects the input sup-
ply against large currents which may cause the sup-
ply to fall out of regulation. The AAT4610 is also pro-
tected from thermal overload which limits power dis-
sipation and junction temperatures. It can be used
to control loads that require up to 1 A. Current limit
threshold is programmed with a resistor from SET to
ground. The quiescent supply current is typically a
low 15µA max. In shutdown mode, the supply cur-
rent decreases to less than 1µA.
The AAT4610 is available in a 5 pin SOT-23 spec-
ified over -40 to 85°C.
The AAT4600 Series is a family of adjustable and
fixed SmartSwitch™ with a range of current han-
dling capabilities. Available are single versions in
adj. current limit (AAT4600, AAT4601) as well as in
fixed current limit (AAT4602, AAT4625). Dual ver-
sions (AAT4620, AAT4626) are also available.
Features
•
•
•
•
•
SmartSwitch
™
•
•
•
•
•
•
•
•
2.7V to 5.5V Input voltage range
Programmable over current threshold
Fast transient response:
<1µs response to short circuit
Low quiescent current
• 15µA typical
• 1µA max with Switch off
160mΩ
typical R
DS(ON)
Only 2.5V needed for ON/OFF Control
Undervoltage Lockout
Thermal shutdown
Temp range -40 to 85°C
4kV ESD Rating
UL Approved—File No. E217765
5 pin SOT-23 package
Preliminary Information
Applications
•
•
•
•
Peripheral ports
Notebook computers
Personal communication devices
Hot swap supplies
UL Recognized Component
Typical Application
INPUT
5
IN
AAT4610
SOT-23
1
OUTPUT
OUT
ON (ON)
4
3
ON/(ON)
GND
2
SET
R
SET
1µF
0.47µF
GND
GND
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1
AAT4610
Current Limited Load Switch in SOT-23 Package
Pin Configuration
5-Pin SOT-23
(Top View)
OUT
GND
SET
1
2
3
5
IN
4
ON
Pin Descriptions
Pin #
1
2
3
4
5
Symbol
OUT
GND
SET
ON
IN
Function
P-channel MOSFET drain. Connect 0.47µF capacitor from OUT to GND.
Ground connection
Current-Limit Set Input. A resistor from SET to ground sets the current limit for
the switch.
Enable Input. Two versions are available, active-high and active-low. See order-
ing information for details.
P-channel MOSFET source. Connect 1µF capacitor from IN to GND.
2
4610.2001.9.0.97
AAT4610
Current Limited Load Switch in SOT-23 Package
Absolute Maximum Ratings
Symbol
V
IN
V
ON
V
SET,
V
OUT
I
MAX
T
J
T
LEAD
V
ESD
(T
A
=25°C unless otherwise noted)
Value
-0.3 to 6
-0.3 to V
IN
+0.3
-0.3 to V
IN
+0.3
2
-40 to 150
300
4000
Description
IN to GND
ON(ON) to GND
SET, OUT to GND
Maximum Continuous Switch Current
Operating Junction Temperature Range
Maximum Soldering Temperature (at Leads)
ESD Rating
1
- HBM
Units
V
V
V
A
°C
°C
V
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.
Note 1: Human body model is a 100pF capacitor discharged through a 1.5kΩ resistor into each pin.
Thermal Characteristics
Symbol
Θ
JA
P
D
Description
Thermal Resistance
2
Power Dissipation
2
Value
150
667
Units
°C/W
mW
Note 2: Mounted on a demo board.
Electrical Characteristics
are at T
A
=25°C)
Symbol
V
IN
I
Q
I
Q(OFF)
I
SD(OFF)
V
UVLO
R
DS(ON)
I
LIM
I
LIM(MIN)
V
ON(L)
V
ON(H)
I
ON(SINK)
T
RESP
T
OFF
T
ON
(V
IN
= 5V, T
A
= -40 to 85°C unless otherwise noted. Typical values
Description
Operation Voltage
Quiescent Current
Off Supply Current
Off Switch Current
Undervoltage Lockout
On-Resistance
Current Limit
Minimum Current Limit
ON (ON) Input Low Voltage
ON (ON) Input High Voltage
ON (ON) Input leakage
Current Limit Response Time
Turn-Off Time
Turn-On Time
Conditions
V
IN
= 5V, ON (ON) = active, I
OUT
= 0
ON (ON) =inactive, V
IN
= 5.5V
ON (ON) = inactive, V
IN
= 5.5V, V
OUT
= 0
Rising edge, 1% hysteresis,
V
IN
=5.0V
V
IN
=4.5V
V
IN
=3.0V
R
SET
= 6.8kΩ
Min
2.7
Typ
15
.03
2.3
160
165
195
1
150
Max
5.5
30
1
15
2.7
180
230
1.25
0.8
Units
V
µ
A
µ
A
µ
A
V
mΩ
mΩ
mΩ
A
mA
V
V
V
µ
A
µ
s
µ
s
µ
s
2.0
.75
V
IN
=2.7V to 3.6V
V
IN
=4.5V to 5.5V
V
ON
= 5.5V
V
IN
=5V
V
IN
=5V, R
L
=10Ω
V
IN
=5V, R
L
=10Ω
2.0
2.4
0.01
0.8
0.4
40
1
2
200
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AAT4610
Current Limited Load Switch in SOT-23 Package
Typical Characteristics
(Unless otherwise noted, V
IN
= 5V, T
A
= 25°C)
Quiescent Current vs. Temperature
Quiescent Current (µA)
25
20
15
10
5
0
-40
-20
0
20
40
60
80
100
120
Quiescent Current
40
Input (
µ
A )
30
20
10
0
2.5
3
3.5
4
4.5
5
5.5
Temperature (C)
Input ( V )
Output Current vs
V
OUT
0.6
R
DS(ON)
vs. Temperature
250
200
Output Current ( A)
Input = 3 V
Input = 5V
0.4
R
DS(ON)
(mΩ)
150
100
50
0
-40
-20
0
20
40
R
SET
=16 kΩ
0.2
0
0
1
2
3
4
5
60
80
100
Te mperature (C)
Vout ( V )
Off-Supply Current vs. Temperature
Off-Supply Current (µA)
Off-Switch Current (µA)
10
10
Off-Switch Current vs. Temperature
1
1
0.1
0.1
0.01
0.01
-40
-20
0
20
40
60
80
100
120
0.001
-40
-20
0
20
40
60
80
100
120
Temperature (C )
Temperature (C )
4
4610.2001.9.0.97
AAT4610
Current Limited Load Switch in SOT-23 Package
(Unless otherwise noted, V
IN
= 5V, T
A
= 25°C)
Turn-ON vs. Temperature
80
0.45
Turn-OFF vs. Temperature
Turn-OFF Time (µs)
Turn-ON Time (µs)
70
60
50
40
30
20
10
0
- 40
- 20
0
20
40
60
80
100
0.4
0.35
0.3
0.25
0.2
0.15
0.1
0.05
0
- 40
Vin=3V
Vin = 3V
Vin = 5V
Vin=5V
- 20
0
20
40
60
80
100
Temperature ( C )
Temperature (C )
Turn-On
R
L
= 10Ω, C
L
= 0.47µF
6
5
6
Turn-Off
R
L
= 10Ω
5
I
OUT
=I
LIMIT
Voltage ( V )
Voltage ( V )
4
3
2
1
0
-1
- 20
ON
Output
4
3
2
1
0
-1
- 0.5
I
OUT
=I
LIMIT
ON
Output
0
20
40
60
0
0.5
1
Time (µs)
Time (µs)
Short Circuit through 0.3Ω
8
12
8
Short Circuit through 0.6Ω
9
Input and Output (V)
Input and Output (V)
6
Input Voltage
Output Current
8
6
Input Voltage
6
Output (A)
4
4
4
Output Current
3
2
0
2
0
Output Voltage
0
0
1
2
3
-4
Output Voltage
0
0
1
2
3
-3
Time (µs)
Time (µs)
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Output (A)
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