PRODUCT DATASHEET
AAT2689
SystemPower
TM
PMIC Solution for 12V Adapter Systems with 2-Output High Performance Step-Down Converters
Typical Characteristics
Step-Down Converter Input Current
vs. Input Voltage
(V
EN1
= V
IN1
)
0.65
0.60
0.55
0.50
0.45
0.40
1400
LDO Dropout Voltage vs. Temperature
Dropout Voltage (mV)
0.70
Input Current (mA)
1200
1000
800
600
400
200
0
-40
-20
0
20
40
60
80
100
I
OUT2
= 600mA
I
OUT2
= 500mA
I
OUT2
= 300mA
I
OUT2
= 150mA
I
OUT2
= 50mA
85°C
25°C
-40°C
6
9
12
15
18
21
24
Input Voltage (V)
Temperature (°C)
LDO Dropout Characteristics
(V
OUT2
= 1.8V)
1.84
LDO Dropout Voltage vs. Output Current
1500
Output Voltage (V)
1.82
1.80
1.78
1.76
1.74
1.72
1.70
1.5
Dropout Voltage (mV)
1200
900
600
300
0
85°C
25°C
-40°C
I
OUT2
= 0.1mA
I
OUT2
= 10mA
I
OUT2
= 50mA
I
OUT2
= 100mA
I
OUT2
= 300mA
I
OUT2
= 600mA
2
2.5
3
3.5
4
4.5
0
100
200
300
400
500
600
Input Voltage (V)
Output Current (mA)
LDO Input Current vs. Input Voltage
(V
EN1
= 0V; V
EN2
= V
IN2
)
100
1.30
1.25
LDO V
IH
and V
IL
vs. Input Voltage
Input Current (µA)
V
IH
and V
IL
(%)
80
60
40
20
0
1.20
1.15
1.10
1.05
1.00
2.5
85°C
25°C
-40°C
2
2.5
3
3.5
4
4.5
5
V
IH
V
IL
3
3.5
4
4.5
5
5.5
Input Voltage (V)
Input Voltage (V)
2689.2008.06.1.0
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