PRODUCT DATASHEET
AAT2603
Total Power Solution for Portable Applications
Typical Characteristics—DC-DC1 (Buck1)
Efficiency vs. Output Current
(V
OUTB1
= 3.3V; L = 3.3µH)
100
90
80
0.4
Load Regulation
(V
OUTB1
= 3.3V; L = 3.3µH)
Output Voltage Error (%)
V
IN
= 5V
V
IN
= 4.2V
V
IN
= 3.6V
Efficiency (%)
70
60
50
40
30
20
10
0
0.1
1
10
100
0.2
0
V
IN
= 5V
V
IN
= 4.2V
V
IN
= 3.6V
1000
10000
-0.2
-0.4
0.1
1
10
100
1000
10000
Output Current (mA)
Output Current (mA)
Line Regulation
(V
OUTB1
= 3.3V; L = 3.3µH)
0.4
0.4
Output Voltage Error vs. Temperature
(V
OUTB1
= 3.3V; V
IN
= 4.2V)
Output Voltage Error
(%)
I
OUT
= 1.2A
I
OUT
= 600mA
I
OUT
= 300mA
I
OUT
= 100mA
I
OUT
= 10mA
I
OUT
= 1mA
I
OUT
= 0.1mA
I
OUT
= 1.2A
I
OUT
= 0.1mA
0.2
Output Voltage Error (%)
0.2
0
0
-0.2
-0.2
-0.4
3.6
4
4.4
4.8
5.2
-0.4
-40
-15
10
35
60
85
Input Voltage (V)
Temperature (°C)
P-Channel R
DS(ON)
vs. Input Voltage
(V
OUTB1
= 3.3V)
250
0.4
Load Transient
(V
OUTB1
= 3.3V; V
IN
= 4.2V; I
OUTB1
= 100mA to 1200mA; C
FF
= 0pF)
P-Channel R
DS(ON)
(mΩ)
200
Output Voltage
(AC Coupled) (top)
0.2
Output Current
(bottom)
0
-0.2
-0.4
1.5
1
0.5
0
150
100
50
T = 120°C
T = 100°C
T = 85°C
T = 25°C
3.1
3.5
3.9
4.3
4.7
5.1
5.5
0
2.7
Input Voltage (V)
Time (100µs/div)
2603.2008.06.1.0
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