AAT2500M
400mA Step-Down Converter and 300mA LDO
Typical Characteristics
Step-Down Converter Efficiency vs. Load
(VOUT = 1.8V; L = 2.2µH)
Step-Down Converter DC Regulation
(VOUT = 1.8V; L = 2.2µH)
1.0
0.5
100
90
VIN = 3.3V
80 VIN = 2.7V
VIN = 3.3V, 4.2V, 5.5V
70
60
50
40
0.0
VIN = 4.2V
VIN = 2.7V
-0.5
-1.0
VIN = 5.5V
30
20
0.1
1
10
100
1000
0.1
1
10
100
1000
Output Current (mA)
Output Current (mA)
Step-Down Converter Efficiency vs. Load
(VOUT = 1.2V; L = 2.2µH)
Step-Down Converter DC Regulation
(VOUT = 1.2V; L = 2.2µH)
1.0
0.5
0.0
100
90
80
70
60
50
40
30
20
VIN = 3.3V
VIN = 2.7V
VIN = 3.6V to 5.5V
VIN = 5V
VIN = 4.2V
VIN = 2.7V
-0.5
-1.0
0.1
1
10
100
1000
0.1
1
10
100
1000
Output Current (mA)
Output Current (mA)
Step-Down Converter Output Ripple
(VOUT = 1.8V; VIN = 5V; IOUT = 1mA)
Step-Down Converter Output Ripple
(VOUT = 1.8V; VIN = 5V; IOUT = 400mA)
1.82
1.81
1.80
1.79
1.81
1.80
1.79
0.2
0.1
0.0
0.6
0.4
0.2
0.0
Time (10µs/div)
Time (200ns/div)
2500M.2007.06.1.0
7
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
