AAT1149 View Datasheet(PDF) - Advanced Analogic Technologies
Part Name
Description
MFG CO.
'AAT1149' PDF : 21 Pages View PDF
SwitchRegTM
Typical Characteristics
Efficiency vs. Load Current
(VOUT = 3V; L = 3µH)
100
VIN = 3.3V
90
80
70
VIN = 4.2V VIN = 5V
60
50
0.1
1
10
100
Load Current (mA)
PRODUCT DATASHEET
AAT1149
3MHz Fast Transient 400mA Step-Down Converter
Load Regulation
(VOUT = 3V; L = 3µH)
1000
1.00
0.75
0.50
VIN = 4.2V
0.25
VIN = 5V
0.00
-0.25
-0.50
-0.75
VIN = 3.3V
-1.00
0.1
1
10
100
1000
Load Current (mA)
Efficiency vs. Load Current
(VOUT = 1.8V; L = 2.2µH)
100
90
VIN = 3V
VIN = 3.6V
80
VIN = 2.7V
70
VIN = 5V
VIN = 4.2V
60
50
0.1
1
10
100
1000
Load Current (mA)
Load Regulation
(VOUT = 1.8V; L = 2.2µH)
1.00
0.75
0.50
0.25
0.00
-0.25
-0.50
VIN = 5V
-0.75
-1.00
0.1
1
VIN = 3V
VIN = 4.2V
VIN = 3.6V
VIN = 2.7V
10
100
1000
Load Current (mA)
No Load Quiescent Current vs. Input Voltage
70
60
85°C
50
40
30
-40°C
20
10
0
2.5
3
3.5
4
4.5
5
Input Voltage (V)
25°C
5.5
6
Switching Frequency vs. Input Voltage
2
1
VOUT = 1.1V
0
-1
-2
-3
VOUT = 1.8V
VOUT = 3V
-4
2.5
3
3.5
4
4.5
5
5.5
Input Voltage (V)
1149.2008.08.1.3
www.analogictech.com
5
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