PRODUCT DATASHEET
AAT2603
Total Power Solution for Portable Applications
Typical Characteristics—DC-DC2 (Buck2)
Efficiency vs. Output Current
(V
OUTB2
= 1.3V; L = 1.5µH)
100
90
80
100
90
80
Efficiency vs. Output Current
(V
OUTB2
= 1V; L = 1.2µH)
Efficiency (%)
70
60
50
40
30
20
10
0
0.1
1
10
100
Efficiency (%)
70
60
50
40
30
20
10
0
0.1
1
10
100
V
IN
= 5V
V
IN
= 4.2V
V
IN
= 3.6V
V
IN
= 2.7V
1000
V
IN
= 5V
V
IN
= 4.2V
V
IN
= 3.6V
V
IN
= 2.7V
1000
Output Current (mA)
Output Current (mA)
Load Regulation
(V
OUTB2
= 1.3V; L = 1.5µH)
0.4
0.4
Load Regulation
(V
OUTB2
= 1V; L = 1.2µH)
V
IN
= 5V
V
IN
= 4.2V
V
IN
= 3.6V
V
IN
= 2.7V
Output Voltage Error (%)
0.2
Output Voltage Error (%)
0.2
V
IN
= 5V
V
IN
= 4.2V
V
IN
= 3.6V
V
IN
= 2.7V
0
0
-0.2
-0.2
-0.4
0.1
1
10
100
1000
-0.4
0.1
1
10
100
1000
10000
Output Current (mA)
Output Current (mA)
Line Regulation
(V
OUTB2
= 1.3V; L = 1.5µH)
0.6
0.6
Line Regulation
(V
OUTB2
= 1V; L = 1.2µH)
Output Voltage Error (%)
I
OUT
= 600mA
I
OUT
= 300mA
I
OUT
= 100mA
I
OUT
= 10mA
I
OUT
= 1mA
I
OUT
= 0.1mA
I
OUT
= 600mA
I
OUT
= 300mA
I
OUT
= 100mA
I
OUT
= 10mA
I
OUT
= 1mA
I
OUT
= 0.1mA
Output Voltage Error (%)
0.4
0.2
0
-0.2
-0.4
-0.6
2.7
0.4
0.2
0
-0.2
-0.4
-0.6
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
3.1
3.5
3.9
4.3
4.7
5.1
5.5
Input Voltage (V)
Input Voltage (V)
2603.2008.06.1.0
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