AAT4290/91
I/O Expander Load Switches with Serial Control
General Description
The AAT4290 and AAT4291 SmartSwitch products
are members of AnalogicTech’s Application
Specific Power MOSFET™ (ASPM™) product
family. The AAT4290 and AAT4291 are five and
three P-channel MOSFETs, respectively, config-
ured for use as a microprocessor I/O expander.
Having independent drain outputs and a common
source input, they operate with an input voltage
ranging from 1.8V to 5.5V, making them ideal for
2.5V, 3.3V, or 5V systems, as well as systems pow-
ered by lithium-ion/polymer batteries. Each switch
features a 500ns turn-on time. The switch states
are controlled by AnalogicTech’s Simple Serial
Control™ (S
2
Cwire™) interface which permits ease
of control and efficiency of size. The quiescent
supply current is very low, typically 5µA. In shut-
down mode, the supply current is reduced to less
than 1µA.
The AAT4290 and AAT4291 are offered in a Pb-
free, 8-pin SC70JW package specified over the
-40°C to +85°C temperature range.
Features
•
•
•
•
•
SmartSwitch
™
•
•
1.8V to 5.5V Input Voltage Range
5 or 3 Independent Load Switches
S
2
Cwire Interface
1.1Ω R
DS(ON)
Per Switch
Low Quiescent Current
— 5µA
— 0.1µA in Shutdown
-40°C to +85°C Temperature Range
8-Pin SC70JW Package
Applications
•
•
•
•
•
Cell Phones
I/O Expansion
Multiple Low Power Switching
Personal Communication Devices
Portable Electronic Devices
Typical Application
INPUT
IN
OUT1
OUT2
OUT1
OUT2
OUT3
OUT4
OUT5
AAT4290
EN/SET
EN/SET
OUT3
OUT4
OUT5
GND
C
IN
1µF
C
OUT1
0.1µF
C
OUT2
0.1µF
C
OUT3
0.1µF
C
OUT4
0.1µF
C
OUT5
0.1µF
GND
GND
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AAT4290/91
I/O Expander Load Switches with Serial Control
Pin Descriptions
Pin #
AAT4290
AAT4291
Symbol
IN
OUT2
OUT1
EN/SET
Function
Input power supply is connected to the P-channel MOSFET
sources. Connect a 1µF capacitor from IN to GND.
P-channel MOSFET drain.
P-channel MOSFET drain.
Input control pin using S
2
Cwire serial interface. The device
records rising edges of the clock and decodes them into 32
states (8 states for AAT4291) which controls the ON/OFF
states of the MOSFETs. See Table 1 and Table 2 for out-
put settings.
Ground connection.
P-channel MOSFET drain.
P-channel MOSFET drain.
P-channel MOSFET drain.
Not connected.
1
2
3
4
1
7
6
4
5
6
7
8
N/A
5
N/A
N/A
8
2, 3
GND
OUT5
OUT4
OUT3
N/C
Pin Configuration
AAT4290
SC70JW-8
(Top View)
IN
OUT2
OUT1
EN/SET
1
2
3
4
8
7
6
5
AAT4291
SC70JW-8
(Top View)
OUT3
OUT4
OUT5
GND
IN
N/C
N/C
EN/SET
1
2
3
4
8
7
6
5
OUT3
OUT2
OUT1
GND
2
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AAT4290/91
I/O Expander Load Switches with Serial Control
Absolute Maximum Ratings
1
Symbol
V
IN
V
OUT
V
EN/SET
I
MAX
T
STORAGE
V
ESD
Description
IN to GND
OUT to GND
EN/SET to GND
Maximum Continuous Switch Current
Storage Temperature Range
ESD Rating - HBM
2
Value
-0.3 to 6.0
-0.3 to V
IN
+ 0.3
-0.3 to 6.0
250
-65 to 150
4000
Units
V
V
V
mA
°C
V
Thermal Characteristics
Symbol
θ
JA
P
D
Description
Thermal Resistance
3
Maximum Power Dissipation (T
A
= 25°C)
4
Value
225
440
Units
°C/W
mW
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 to each pin.
3. Mounted on the board.
4. Derate 4.4mW/°C above 25°C.
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AAT4290/91
I/O Expander Load Switches with Serial Control
Electrical Characteristics
V
IN
= 5.0V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are T
A
= 25°C.
Symbol
V
IN
I
Q
I
Q(OFF)
I
SD(OFF)
V
UVLO
V
UVLO(hys)
R
DS(ON)
Description
Operation Voltage
Quiescent Current
Off Supply Current
Off Switch Current
Under-Voltage Lockout
Under-Voltage Lockout Hysteresis
Conditions
V
IN
= 5.5V, EN/SET = V
IN
, I
OUT
= 0,
All Switches ON
EN/SET = 0, V
IN
= 5.5V, V
OUT
Open
EN/SET = 0, V
IN
= 5.5V, V
OUTn
= 0
V
IN
Falling
V
IN
V
IN
V
IN
V
IN
=
=
=
=
1.8V, T
A
3.0V, T
A
4.2V, T
A
5.0V, T
A
=
=
=
=
25°C
25°C
25°C
25°C
Min
1.8
Typ Max
5.5
4.5
8
1
1
Units
V
µA
µA
µA
V
mV
Ω
On Resistance
0.1
1.2
250
2.5
1.5
1.2
1.1
2800
3.8
2.2
1.8
1.7
On Resistance Temperature
Coefficient
AAT4290-1 and AAT4291-1
T
D(ON)
Output Turn-On Delay Time
T
R
Turn-On Rise Time
T
D(OFF)
Turn-Off Delay Time
EN/SET
V
EN(L)
Enable Threshold Low
V
EN(H)
Enable Threshold High
T
LO
EN/SET Low Time
T
CRDS
T
HI
T
O
T
LAT
I
SINK
Minimum EN/SET High Time
EN/SET Off Timeout
EN/SET Latch Timeout
EN/SET Input Leakage
ppm°C
V
IN
= 5V, R
LOAD
= 500Ω, C
OUT
= 0.1µF
V
IN
= 5V, R
LOAD
= 500Ω, C
OUT
= 0.1µF
V
IN
= 5V, R
LOAD
= 500Ω
V
IN
= 1.8V
V
IN
= 5.5V
V
EN/SET
< 0.4V
V
IN
≤
2.5V
V
IN
> 2.5V
40
270
40
0.4
1.6
100
500
250
4.0
4.0
1
ns
ns
ns
V
V
ns
ns
µs
µs
µA
V
EN/SET
= 5.5V
2.6
2.6
0.01
1. The AAT4290/91 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is
assured by design, characterization, and correlation with statistical process controls.
4
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Power technology
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