SmartSwitch
TM
General Description
The AAT4295/97 SmartSwitch is a member of
AnalogicTech's Application Specific Power MOS-
FETTM (ASPMTM) product family. The AAT4295/97
is comprised of three/six low-side N-channel MOS-
FET switches that gate an applied load to ground.
This device is intended for controlling RGB fashion
lighting in portable products; it can also be used for
a combination of general purposes where a load
requires a low-side switch connection to ground.
The AAT4295/97 simplifies design and layout limi-
tations by eliminating the need for multiple GPIO
control lines and discrete MOSFETs to control
product features.
The state of each output channel is controlled with a
single GPIO line via the EN/SET pin using
AnalogicTech's Simple Serial ControlTM (S
2
CwireTM)
interface. After a short set of data pulses is sent to
the EN/SET input and the line is pulled to logic high,
the device is enabled with the desired switch config-
uration. In the enabled state, the AAT4295/97 typi-
cally consumes less than 3A of quiescent current.
When EN/SET is pulled to a logic low, the device is
disabled and each output switch is placed in a high
impedance open state.
The AAT4295 and AAT4297 operate over an input
voltage range of 1.8V to 5.5V, making them ideal for
battery-powered applications. The three-switch
AAT4295 is offered in a Pb-free, 8-pin SC70JW
package, while the six-switch AAT4297 is offered in a
Pb-free, 12-pin TSOPJW package. Both devices are
rated over the -40C to +85C temperature range.
Features
Input Voltage Range: 1.8V to 5.5V
Independent Low-Side N-Channel MOSFET
Switches:
-- AAT4295: Three Channels
-- AAT4297: Six Channels
User-Programmable S
2
Cwire Interface
Single GPIO Controls State of Each MOSFET
Low Quiescent Current: 3A Typical
Temperature Range: -40C to +85C
No External Components Required
Available in Pb-Free Packages
-- AAT4295 in 8-Pin SC70JW
-- AAT4297 in 12-Pin TSOPJW
Applications
Cell Phones
Multiple Low Power Switching
Personal Communication Devices
Portable Electronic Devices
AAT4295/97
Single/Dual RGB Controller
Typical Application
D1
RB1
D2
RB2
D3
RB3
*D4
RB4
*D5
RB5
*D6
RB6
EN/SET
S1
S2
S3
*S4
*S5
*S6
GND
EN/SET
V
CC
* AAT4297 Only
AAT4295/97
VCC
4295.2006.03.1.3
1
Pin Descriptions
Pin Configuration
AAT4295
AAT4297
SC70JW-8
TSOPJW-12
(Top View)
(Top View)
1
2
3
4
5
6
12
11
10
9
8
7
GND
S1
S2
S5
S4
S3
N/C
EN/SET
N/C
N/C
VCC
S6
N/C
N/C
EN/SET
S3
S2
S1
GND
VCC
1
2
3
4
5
6
7
8
Pin Number
AAT4295
AAT4297
Symbol
Function
1
8
VCC
Input supply voltage.
2, 3
9, 10, 12
N/C
No connection.
4
11
EN/SET
Input control pin using S
2
Cwire serial interface. The device records
rising edges of the clock and decodes them into eight states, which
control the ON/OFF states of the MOSFETs. See Table 1 for output
settings. In addition, a logic low forces the device into shutdown
mode, reducing the supply current to less than 1A. This pin should
not be left floating.
5
1
GND
Ground connection.
6
2
S1
Drain of the N-channel MOSFET for Channel 1.
7
3
S2
Drain of the N-channel MOSFET for Channel 2.
8
6
S3
Drain of the N-channel MOSFET for Channel 3.
N/A
4
S5
Drain of the N-channel MOSFET for Channel 5.
N/A
5
S4
Drain of the N-channel MOSFET for Channel 4.
N/A
7
S6
Drain of the N-channel MOSFET for Channel 6.
AAT4295/97
Single/Dual RGB Controller
2
4295.2006.03.1.3
Absolute Maximum Ratings
1
Thermal Information
2
Symbol
Description
Value
Units
JA
Thermal Resistance
SC70JW
225
C/W
TSOPJW
160
P
D
Maximum Power Dissipation
SC70JW
440
3
mW
TSOPJW
625
4
Symbol
Description
Value
Units
V
CC
to GND
Power Supply to GND
6.0
V
INx to GND
All Input (Drain) to GND
-0.3 to 6.0
V
EN/SET
EN/SET to GND
-0.3 to 6.0
V
T
J
Operating Junction Temperature Range
-40 to 150
C
AAT4295/97
Single/Dual RGB Controller
4295.2006.03.1.3
3
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. Mounted on an FR4 board.
3. Derated 4.4mW/C above 25C.
4. Derated 6.25mW/C above 25C.
Electrical Characteristics
1
V
CC
= 5.0V; T
A
= -40C to +85C, unless otherwise noted. Typical values are T
A
= 25C.
Symbol
Description
Conditions
Min
Typ
Max
Units
V
CC
Supply Voltage Range
1.8
5.5
V
I
Q
Quiescent Current
V
CC
= 5V, EN/SET = V
CC
, I
OUT
=
3.0
10
A
No Load, All Switches On
I
Q(OFF)
Off Supply Current
EN/SET = 0, V
CC
= 5V, V
OUT
Open
1.0
A
I
DS(OFF)
Off Switch Current for Any
EN/SET = 0, V
CC
= 5V, V
OUT
= 0
0.1
1.0
A
Switch
R
DS(ON)
On-Resistance
V
CC
= 5V
1.9
6.0
V
CC
= 3.6V
2.1
7.0
T
CRDS
On-Resistance Temperature
2800
ppm/C
Coefficient
T
ON
Output Turn-On Time
2
V
IN
= 5V, R
PULLUP
= 250
, C
OUT
= 0.1F
0.6
2.7
s
EN/SET
V
EN(L)
Enable Threshold Low
V
IN
= 1.8V
0.3
V
V
EN(H)
Enable Threshold High
V
IN
= 5.5V
1.4
V
T
EN/SET LO
EN/SET Low Time
0.5
75
s
T
EN/SET_HI_MIN
Minimum EN/SET High Time
50
ns
T
EN/SET_HI_MAX
Maximum EN/SET High Time
75
s
T
OFF
EN/SET Off Timeout
500
s
T
LAT
EN/SET Latch Timeout
500
s
I
EN/SET
EN/SET Input Leakage
-1
1
A
AAT4295/97
Single/Dual RGB Controller
4
4295.2006.03.1.3
1. The AAT4295 is guaranteed to meet performance specifications over the -40C to +85C operating temperature range and is assured
by design, characterization, and correlation with statistical process controls.
2. T
ON
is the time after latch timeout to 10% of the output voltage. See Figure 1, Timing Diagram.
Typical Characteristics
R
DS(ON)
vs. Temperature
(V
IN
= 5V; I
LOAD
= 20mA)
Temperature (
C)
R
DS(ON)
(
)
1.0
1.5
2.0
2.5
3.0
-40
-20
0
20
40
60
80
100
R
DS6
R
DS3
R
DS4
R
DS5
R
DS2
R
DS1
R
DS(ON)
vs. Temperature
(V
IN
= 3.6V; I
LOAD
= 20mA)
Temperature (
C)
R
DS(ON)
(
)
1.0
1.5
2.0
2.5
3.0
-40
-20
0
20
40
60
80
100
R
DS6
R
DS3
R
DS4
R
DS5
R
DS2
R
DS1
R
DS(ON)
vs. Input Voltage
(I
LOAD
= 20mA)
Input Voltage (V)
R
DS(ON)
(
)
1.0
1.5
2.0
2.5
3.0
3.5
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
R
DS1
R
DS5
R
DS2
R
DS3
R
DS4
R
DS6
Off-Supply Current vs. Temperature
Temperature (
C)
Quiescent Current (A)
0.000
0.001
0.002
0.003
0.004
0.005
0.006
-40
-20
0
20
40
60
80
100
V
IN
= 5V
V
IN
= 4.2V
V
IN
= 3.3V
V
IN
= 1.8V
Quiescent Current vs. Temperature
Temperature (
C)
Quiescent Current (A)
1.0
1.5
2.0
2.5
3.0
-40
-20
0
20
40
60
80
100
V
IN
= 5V
V
IN
= 3.6V
Quiescent Current vs. Input Voltage
Input Voltage (V)
Quiescent Current (
A)
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
1.5
2
2.5
3
3.5
4
4.5
5
5.5
85C
25C
-40C
AAT4295/97
Single/Dual RGB Controller
4295.2006.03.1.3
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4295.2006.03.1.3
5
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