PRODUCT DATASHEET
AAT2789
SystemPowerTM
Low Noise, High Frequency Dual Step-Down Converter
Typical Characteristics – Channel 2
Line Regulation
(VOUT = 1.8V)
Switching Frequency vs. Temperature
(VOUT = 1.8V; IOUT = 800mA)
2.08
0.5
1mA
0.4
2.06
2.04
2.02
2
400mA
0.3
600mA
0.2
800mA
0.1
0
-0.1
-0.2
-0.3
-0.4
-0.5
1.98
1.96
1.94
1.92
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
-40
-15
10
35
60
85
Input Voltage (V)
Temperature (°C)
Frequency Variation vs. Input Voltage
Output Voltage Error vs. Temperature
(VIN = 3.6V; VO = 1.8V, IOUT = 400mA)
2.0
1.0
4
3
2
1
0.0
0
-1
-2
-3
-4
-1.0
-2.0
VOUT = 1.8V
VOUT = 3V
-40
-20
0
20
40
60
80
100
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
Input Voltage (V)
Temperature (°C)
No Load Quiescent Current vs. Input Voltage
P-Channel RDS(ON) vs. Input Voltage
550
500
450
400
350
300
250
200
60
55
50
45
40
35
30
25
120°C
100°C
85°C
25°C
85°C
20
25C
15
-40°C
10
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
2.5
3
3.5
4
4.5
5
5.5
6
Input Voltage (V)
Input Voltage (V)
w w w . a n a l o g i c t e c h . c o m
10
2789.2008.03.1.0
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
