PRODUCT DATASHEET
AAT2784
SystemPower
TM
Typical Characteristics
Efficiency vs. Output Current
(Channels 1 and 2; V
OUT
= 3.3V)
100
90
3-Channel Step-Down DC/DC Converter
Load Regulation
(Channels 1 and 2; V
OUT
= 3.3V)
1
0.8
V
IN
= 3.6V
Output Error (%)
V
IN
= 4.2V
V
IN
= 5.0V
Efficiency (%)
80
70
60
50
40
30
20
0.1
1
10
100
1000
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1
0.1
1
10
100
1000
V
IN
= 5.0V
V
IN
= 4.2V
V
IN
= 3.6V
Output Current (mA)
Output Current (mA)
Efficiency vs. Output Current
(Channel 3; V
OUT
= 1.2V)
100
90
80
1
0.8
Load Regulation
(Channel 3; V
OUT
= 1.2V)
Output Error (%)
Efficiency (%)
V
IN
= 4.2V
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
70
60
50
40
30
20
10
0
0.1
1
10
100
1000
10000
V
IN
= 4.2V
V
IN
= 2.7V
V
IN
= 3.6V
V
IN
= 3.6V
V
IN
= 2.7V
-1
0.1
1
10
100
1000
10000
Output Current (mA)
Output Current (mA)
Switching Frequency vs. Input Voltage
10
1
0.8
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1
2.8
3.3
3.8
4.3
4.8
5.3
5.8
-40
Output Error vs. Temperature
Switching Frequency (%)
8
4
2
0
-2
-4
-6
-8
-10
2.3
Output Error (%)
6
Channel 3
Channels 1 and 2
Channel 3
Channels 1 and 2
-15
10
35
60
85
Input Voltage (V)
Temperature (°C)
2784.2007.11.1.1
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