AAT1150
1MHz 1A Step-Down DC/DC Converter
Typical Characteristics
Output Voltage vs. Temperature
(I
OUT
= 900mA; V
OUT
= 1.5V)
Output Voltage Error (%)
1.0
Line Regulation
(V
OUT
= 1.5V)
0.25
0.15
0.6
0.2
V
IN
= 2.7V
Accuracy (%)
I
OUT
= 1.0A
0.05
-0.05
-0.15
-0.25
-0.2
V
IN
= 3.6V
I
OUT
= 0.4A
-0.6
-1.0
-20
0
20
40
60
80
100
2.5
3
3.5
4
4.5
5
5.5
Temperature (°C)
Input Voltage (V)
Load Regulation
(V
OUT
= 1.5V; V
IN
= 3.6V)
0
-1
0
-1
Load Regulation
(V
OUT
= 3.3V; V
IN
= 5.0V)
V
OUT
Error (%)
Error (%)
-2
-3
-4
-2
-3
-4
-5
-5
0
150
300
450
600
750
900
0
150
300
450
600
750
900
1050
I
OUT
(mA)
Output Current (mA)
Efficiency vs. Input Voltage
(V
OUT
= 1.5V)
100
20
(C
O
= 22µF; V
O
= 1.5V; V
IN
= 3.6V; I
O
= 1A)
µ
200
160
120
16
12
8
AAT1150 Loop Gain and Phase
I
O
= 1A
90
Efficiency (%)
Phase
Phase (degrees)
80
40
0
Gain (dB)
80
70
60
50
2.5
3
3.5
I
O
= 0.4A
4
0
-4
-8
-12
-16
-20
10
Gain
4 x 22µF
5 x 22µF
100
3 x 22µF
-40
-80
-120
-160
-200
1000
4
4.5
5
5.5
Input Voltage (V)
Frequency (kHz)
6
1150.2005.11.1.4
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
