PRODUCT DATASHEET
AAT2789
SystemPower
TM
Low Noise, High Frequency Dual Step-Down Converter
Typical Characteristics – Channel 2
Efficiency vs. Output Current
(V
OUT
= 3.3V)
100
90
80
70
60
50
40
30
0.1
1
10
100
1
0.8
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1
0.1
1
10
100
1000
Load Regulation
(V
OUT
= 3.3V)
V
IN
= 3.6V
V
IN
= 4.2V
V
IN
= 5V
V
IN
= 3.6V
V
IN
= 4.2V
V
IN
= 5V
1000
Output Current (mA)
Output Error (%)
Efficiency (%)
Output Current (mA)
Efficiency vs. Output Current
(V
OUT
= 2.5V)
100
1
0.8
Load Regulation
(V
OUT
= 2.5V)
V
IN
= 3V
V
IN
= 3.6V
V
IN
= 4.2V
V
IN
= 5V
80
70
60
50
40
30
0.1
1
10
100
Output Error (%)
90
Efficiency (%)
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1
0.1
1
10
100
V
IN
= 3V
V
IN
= 3.6V
V
IN
= 4.2V
V
IN
= 5V
1000
1000
Output Current (mA)
Output Current (mA)
Efficiency vs. Output Current
(V
OUT
= 1.8V)
100
90
80
70
60
50
40
30
0.1
1
10
100
1
0.8
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1
0.1
1
Load Regulation
(V
OUT
= 1.8V)
Output Error (%)
Efficiency (%)
V
IN
= 2.7V
V
IN
= 3.6V
V
IN
= 4.2V
1000
V
IN
= 2.7V
V
IN
= 3.6V
V
IN
= 4.2V
10
100
1000
Output Current (mA)
Output Current (mA)
2789.2008.03.1.0
www.analogictech.com
9
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
