AAT4280A
Slew Rate Controlled Load Switch
General Description
The AAT4280A SmartSwitch™ is a member of
AnalogicTech's Application Specific Power MOS-
FET™ (ASPM™) product family. The AAT4280A is
a P-channel MOSFET power switch designed for
high-side load-switching applications. The device
has a typical R
DS(ON)
of 80mΩ, allowing increased
load switch power handling capacity and is avail-
able in three different versions with flexible turn-on
and turn-off characteristics -- from very fast to slew
rate limited. The standard AAT4280A (-1) version
has a slew rate limited turn-on load switch and is
functionally compatible with the AAT4250 device,
while offering superior R
DS(ON)
characteristics. The
AAT4280A (-2) version features fast load switch
turn-on capabilities, typically less than 500ns turn-
on and 3µs turn-off times. The AAT4280A (-3) vari-
ation offers a shutdown load discharge circuit to
rapidly turn off a load circuit when the switch is dis-
abled. All AAT4280A load switch versions operate
with an input voltage ranging from 1.5V to 5.5V,
making them ideal for both 3V and 5V systems.
Input logic levels are TTL and 2.5V to 5V CMOS
compatible. The quiescent supply current is very
low, typically 25nA.
The AAT4280A is available in an 8-pin SC70JW
package and is specified over the -40°C to +85°C
temperature range.
Features
•
•
•
SmartSwitch
™
•
•
•
•
•
•
1.5V to 5.5V Input Voltage Range
Very Low R
DS(ON)
, Typically 80mΩ (5V)
Slew Rate Limited Turn-On Time Options
— 1ms
— 0.5µs
— 100µs
Fast Shutdown Load Discharge Option
Low Quiescent Current
— 25nA (typ)
TTL/CMOS Input Logic Level
Temperature Range: -40ºC to +85°C
4kV ESD Rating
8-Pin SC70JW Package
Applications
•
•
•
•
•
•
Cellular Telephones
Digital Still Cameras
Hot Swap Supplies
Notebook Computers
Personal Communication Devices
Personal Digital Assistants (PDAs)
Typical Application
V
IN
IN
IN
C
IN
1µF
ON
OUT
V
OUT
AAT4280A
GND
GND
C
OUT
0.1µF
ON/OFF
GND
GND
4280A.2005.02.1.1
1
AAT4280A
Slew Rate Controlled Load Switch
Absolute Maximum Ratings
1
T
A
= 25°C, unless otherwise noted.
Symbol
V
IN
V
ON
V
OUT
I
MAX
I
DM
T
J
T
LEAD
V
ESD
Description
IN to GND
ON/OFF to GND
OUT to GND
Maximum Continuous Switch Current
Maximum Pulsed Current
Operating Junction Temperature Range
Maximum Soldering Temperature (at leads)
ESD Rating
2
- HBM
IN
≥
2.5V
IN < 2.5V
Value
-0.3 to 6
-0.3 to 6
-0.3 to V
IN
+0.3
2.3
6
3
-40 to 150
300
4000
Units
V
V
V
A
A
A
°C
°C
V
Thermal Characteristics
Symbol
Θ
JA
P
D
Description
Thermal Resistance
3
Power Dissipation
3
Value
140
714
Units
°C/W
mW
Notes:
1. Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. Functional operation at condi-
tions other than the operating conditions specified is not implied. Only one Absolute Maximum Rating should be applied at any one time.
2. Human body model is a 100pF capacitor discharged through a 1.5kΩ resistor into each pin.
3. Mounted on an AAT4280A demo board in still 25ºC air.
4280A.2005.02.1.1
3
AAT4280A
Slew Rate Controlled Load Switch
Electrical Characteristics
Unless otherwise noted, V
IN
= 5V, T
A
= -40°C to +85°C; typical values are at T
A
= 25°C.
Symbol Description
AAT4280A All Versions
V
IN
Operation Voltage
I
Q
Quiescent Current
I
Q
(off)
Off Supply Current
I
SD
(off) Off Switch Current
R
DS(on)
On-Resistance
Conditions
Min
1.5
Typ
Max
5.5
1
1
1
120
130
150
250
0.4
Units
V
µA
µA
µA
ON/OFF = Active
ON/OFF = Inactive, OUT = Open
ON/OFF = Inactive, V
OUT
= 0
V
IN
= 5V, T
A
= 25°C
V
IN
= 4.2V, T
A
= 25°C
V
IN
= 3V, T
A
= 25°C
V
IN
= 1.8V, T
A
= 25°C
V
IN
= 1.8V to 5.5V
V
IN
= 2.7V to 4.2V
V
IN
= 4.2V to 5.5V
V
IN
= 1.5V to 2.7V
V
ON/OFF
= 5.5V
1
TC
RDS
V
IL
V
IH
On-Resistance Temperature Coefficient
ON/OFF Input Logic Low Voltage
ON/OFF Input Logic High Voltage
80
85
100
160
2800
2
2.4
1.4
mΩ
ppm/°C
V
V
I
SINK
ON/OFF Input Leakage
AAT4280A-1
T
D(ON)
Output Turn-On Delay
T
ON
Output Turn-On Rise Time
T
D(OFF)
Output Turn-Off Delay Time
AAT4280A-2
T
D(ON)
Output Turn-On Delay
T
ON
Output Turn-On Rise Time
T
D(OFF)
Output Turn-Off Delay Time
AAT4280A-3
T
D(ON)
Output Turn-On Delay
T
ON
Output Turn-On Rise Time
T
D(OFF)
Output Turn-Off Delay Time
R
PD
Output Pull-Down Resistance During OFF
1
20
1000
4
0.5
0.5
4
20
100
4
150
40
1500
10
2
1
10
40
150
10
250
µA
µS
µS
µS
µS
µS
µS
µS
µS
µS
Ω
V
IN
= 5V, R
LOAD
= 10Ω, T
A
= 25°C
V
IN
= 5V, R
LOAD
= 10Ω, T
A
= 25°C
V
IN
= 5V, R
LOAD
= 10Ω, T
A
= 25°C
V
IN
= 5V, R
LOAD
= 10Ω, T
A
= 25°C
V
IN
= 5V, R
LOAD
= 10Ω, T
A
= 25°C
V
IN
= 5V, R
LOAD
= 10Ω, T
A
= 25°C
V
IN
= 5V,
V
IN
= 5V,
V
IN
= 5V,
ON/OFF
R
LOAD
= 10Ω, T
A
= 25°C
R
LOAD
= 10Ω, T
A
= 25°C
R
LOAD
= 10Ω, T
A
= 25°C
= Inactive, T
A
= 25°C
Notes:
1. For V
IN
outside this range, consult typical ON/OFF threshold curve.
4
4280A.2005.02.1.1
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