1MHz 3A Buck DC/DC Converter
Typical Characteristics
Line Regulation
V
OUT
=3.3V
1
AAT1154
Over Temp Current vs. Input Voltage
V
OUT
= 3.3V
3.6
Output Current (A)
Output Voltge Error (%)
0
-1
-2
-3
-4
-5
3
I
O
= 0.3A
3.4
3.2
3
2.8
2.6
2.4
2.2
70°C
85°C
100°C
3.5
3.75
4
4.25
4.5
4.75
5
5.25
5.5
I
O
= 3.0A
2
3.5
4
4.5
5
5.5
6
Input Voltage (V)
Input Voltage (V)
Load Regulation
V
IN
= 5.0V, V
IN
= 3.3V
0.0
-1.0
Non-Switching Operating Current vs. Temperature
FB = 0V
0.8
Operating Current (mA)
V
IN
= 5.5V
0.7
V
IN
= 5.0V
Output Error (%)
-2.0
-3.0
-4.0
-5.0
-6.0
-7.0
-8.0
-9.0
-10.0
0.01
0.1
1
10
0.6
V
IN
= 4.2V
0.5
V
IN
= 3.6V
V
IN
= 2.7V
0.4
-20
0
20
40
60
80
100
120
Load Current (A)
Temperature (°C)
Over Temp Shutdown Current vs. Temperature
V
OUT
= 3.3V, V
IN
= 5.0V, L = 1.5µH
6
5.5
Inrush and Output Overshoot Characteristic
3A Load
14
12
Inductor Current
6
4
2
0
-2
Output Current (A)
Voltage (V)
(bottom traces)
5
4.5
4
3.5
3
2.5
2
10
20
30
40
50
60
70
80
90
100
10
8
6
4
2
0
-2
0
0.4
0.8
1.2
1.6
2
Current (A)
(top trace)
Input
Output
-4
-6
-8
-10
Temperature (°C)
Time (millisec)
6
1154.2003.08.0.91
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
