AAT1155 Datasheet, PDF (6/17 Pages) Advanced Analogic Technologies – 1MHz 2.5A Step-Down DC/DC Converter

AAT1155
1MHz 2.5A Step-Down DC/DC Converter
Typical Characteristics
Line Regulation
(V_OUT = 3.3V)
1
0
I_O = 0.3A
-1
-2
-3
-4
I_O = 3.0A
-5
3.4
3.7
4
4.3
4.6
4.9
5.2
5.5
Input Voltage (V)
AAT1155 Evaluation Board
Over-Temperature Current vs. Input Voltage
(V_OUT = 3.3V)
3.6
3.4
3.2 ^55°C
3
2.8 ^70°C
2.6
2.4
2.2 ^85°C
2
1.8 ^100°C
1.6
3.5 3.75
4
4.25 4.5 4.75
5
5.25 5.5
Input Voltage (V)
0.0
-1.0
-2.0
-3.0
-4.0
-5.0
-6.0
-7.0
-8.0
-9.0
-10.0
0.01
Load Regulation
(V_IN = 5.0V; V_OUT = 3.3V)
0.10
1.00
Load Current (A)
10.00
Non-Switching Operating
Current vs. Temperature
(FB = 0V)
750
700
650 _{2.7V 3.6V 4.2V}
600
550
5.0V 5.5V
500
450
-20
0
20
40
60
80
100
120
Temperature (°C)
Over-Temperature Shutdown
Current vs. Temperature
(V_OUT = 3.3V; V_IN = 5.0V)
5
4.5
4
3.5
3
2.5
2
-20 -10 0 10 20 30 40 50 60 70 80 90 100
Temperature (°C)
Inrush and Output
Overshoot Characteristics
8
14
6
12
4
10
2
8
0
6
-2
4
-4
2
-6
0
-8
-2
0
0.4
0.8
1.2
1.6
2
Time (ms)
6
1155.2005.11.1.6