AAT2505
Dual Channel, Step-Down
Converter/Linear Regulator
Typical Characteristics
Unless otherwise noted, VIN = 5V, TA = 25°C.
LDO Over-Current Protection
LDO ENLDO vs. VIN
(EN = GND; ENLDO = VIN)
1200
1000
800
600
400
200
0
1.250
1.225
1.200
1.175
1.150
1.125
1.100
1.075
1.050
VIH
VIL
-200
2.5
3.0
3.5
4.0
4.5
5.0
5.5
Time (50ms/div)
Input Voltage (V)
Step-Down Converter Efficiency vs. Load
(VOUT = 3.3V; L = 10μμH; ENLDO = GND)
Step-Down Converter DC Regulation
(VOUT = 3.3V; L = 6.8µH; ENLDO = GND)
1.0
0.5
0.0
100
VIN = 5.0V
90
VIN = 3.9V
VIN = 4.2V
80
VIN = 4.2V
-0.5
-1.0
70
60
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 = 2.5V; L = 10μμH; ENLDO = GND)
Step-Down Converter DC Regulation
(VOUT = 2.5V; L = 6.8µH; ENLDO = GND)
1.0
0.5
100
VIN = 3.3V
VIN = 5.0V
VIN = 4.2V
90
80
70
60
VIN = 3.0V
VIN = 3.6V
0.0
VIN = 3.6V
VIN = 3.0V
-0.5
-1.0
0.1
1
10
100
1000
0.1
1
10
100
1000
Output Current (mA)
Output Current (mA)
8
2505.2006.06.1.1
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
