AAT1149 Analogic Corporation, AAT1149 Datasheet - Page 5

• Manufacturer Part Number: AAT1149
• Manufacturer: Analogic Corporation

Typical Characteristics
1149.2006.11.1.0
100
No Load Quiescent Current vs. Input Voltage
100
90
80
70
60
50
70
60
50
40
30
20
10
90
80
70
60
50
0
0.1
2.5
0.1
V
V
IN
IN
= 3.6V
85°C
= 3.3V
-40°C
V
Efficiency vs. Load Current
Efficiency vs. Load Current
3
IN
= 3V
1
(V
1
V
V
3.5
(V
IN
OUT
IN
Load Current (mA)
Load Current (mA)
= 4.2V
OUT
= 4.2V
Input Voltage (V)
V
= 1.8V; L = 2.2µH)
IN
= 3V; L = 3µH)
= 2.7V
4
10
10
V
IN
V
4.5
IN
= 5V
= 5V
5
100
100
5.5
25°C
1000
1000
6
-0.25
-0.50
-0.75
-1.00
-1
-2
-3
-4
1.00
0.75
0.50
0.25
0.00
2
1
0
-0.25
-0.50
-0.75
-1.00
1.00
0.75
0.50
0.25
0.00
2.5
Switching Frequency vs. Input Voltage
0.1
0.1
V
400mA Step-Down Converter
OUT
V
IN
= 1.1V
= 5V
3
(V
1
Load Regulation
Load Regulation
1
(V
OUT
V
3.5
Load Current (mA)
Load Current (mA)
OUT
OUT
3MHz Fast Transient
Input Voltage (V)
V
= 1.8V; L = 2.2µH)
IN
= 1.8V
= 3V; L = 3µH)
= 3.6V
4
10
10
V
V
IN
IN
V
= 3V
= 3.3V
IN
4.5
V
= 4.2V
IN
V
OUT
= 2.7V
100
100
= 3V
V
IN
V
5
IN
= 4.2V
= 5V
1000
1000
5.5
5