850kHz 1A Buck DC/DC Converter
Typical Characteristics
Oscillator Frequency Variation vs. Temperature
(V
IN
= 3.6V)
10
6
1.0
0.6
0.2
-0.2
-0.6
-1.0
-20
AAT1152
Output Voltage vs. Temperature
(I
OUT
= 900mA; V
OUT
= 1.5V)
Output Voltage Error (%)
Variation (%)
2
-2
-6
-10
-20
V
IN
= 2.7V
V
IN
= 3.6V
0
20
40
60
80
100
0
20
40
60
80
100
Temperature (°C)
Temperature (°C)
Line Regulation
(V
OUT
= 1.5V)
0.25
0.15
0
-1
Load Regulation
(V
OUT
= 1.5V; V
IN
= 3.6V)
Accuracy (%)
I
OUT
= 1.0A
0.05
-0.05
-0.15
-0.25
2.5
3
3.5
4
4.5
5
5.5
Error (%)
-2
-3
-4
-5
0
150
300
450
600
750
900
I
OUT
= 0.4A
Input Voltage (V)
I
OUT
(mA)
Load Regulation
(V
OUT
= 3.3V; V
IN
= 5.0V)
0
-1
100
Efficiency vs. Input Voltage
(V
OUT
= 1.5V)
I
O
= 1A
90
V
OUT
Error (%)
Efficiency (%)
-2
-3
-4
-5
0
150
300
450
600
750
900
1050
80
70
60
50
2.5
3
3.5
I
O
= 0.4A
Output Current (A)
4
4.5
5
5.5
Input Voltage (V)
6
1152.2006.09.1.7
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
