1MHz 400mA Step-Down Converter
Typical Characteristics
Efficiency vs. Load
(V
OUT
= 2.5V; L = 4.7μH)
μ
V
IN
= 3.3V
100
2.0
AAT1143
(V
OUT
= 2.5V; L = 4.7μH)
μ
Load Regulation
V
IN
= 3.0V
Efficiency (%)
90
Output Error (%)
1.0
V
IN
= 3.0V
0.0
80
V
IN
= 3.6V
V
IN
= 3.3V
-1.0
70
V
IN
= 3.6V
60
0.1
-2.0
1
10
100
1000
0.1
1
10
100
1000
Output Current (mA)
Output Current (mA)
Efficiency vs. Load
(V
OUT
= 1.8V; L = 4.7μH)
μ
V
IN
= 3.6V
100
90
2.0
(V
OUT
= 1.8V; L = 4.7μH)
μ
DC Regulation
V
IN
= 2.7V
Output Error (%)
Efficiency (%)
1.0
V
IN
= 4.2V
80
70
60
50
0.1
1
10
100
1000
V
IN
= 4.2V
0.0
V
IN
= 2.7V
-1.0
V
IN
= 3.6V
-2.0
0.1
1
10
100
1000
Output Current (mA)
Output Current (mA)
Frequency vs. Input Voltage
(V
OUT
= 1.8V)
1.0
2.0
Output Voltage Error vs. Temperature
(V
IN
= 3.6V; V
O
= 1.5V)
Frequency Variation (%)
Output Error (%)
0.5
0.0
-0.5
-1.0
-1.5
-2.0
2.7
1.0
INTERNAL DOCUMENT
DO NOT COPY
0.0
-1.0
-2.0
3.1
3.5
3.9
4.3
4.7
5.1
5.5
-40
-20
0
20
40
60
80
100
Input Voltage (V)
°
Temperature (°C)
1143.2006.07.1.10
5
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
