AAT2506
1MHz Step-Down Converter/LDO Regulator
Typical Characteristics
Unless otherwise noted, VIN = 5V, TA = 25°C.
Step-Down Converter Efficiency vs. Load
(VOUT = 1.5V; L = 4.7µH; ENLDO = GND)
Step-Down Converter DC Regulation
(VOUT = 1.5V; L = 4.7µH; ENLDO = GND)
3.0
2.0
100
VIN = 2.7V
VIN = 3.6V
VIN = 4.2V
VIN = 3.6V
90
80
70
60
50
1.0
VIN = 4.2V
0.0
VIN = 2.7V
-1.0
-2.0
-3.0
0.1
1
10
100
1000
0.1
1
10
100
1000
Output Current (mA)
Output Current (mA)
Step-Down Converter
Frequency vs. Input Voltage
(VOUT = 1.8V; EN = VIN; ENLDO = GND)
Step-Down Converter
Output Voltage Error vs. Temperature
(VIN = 3.6V; VO = 1.5V; EN = VIN; ENLDO = GND)
2.0
1.0
1.0
0.5
0.0
-0.5
-1.0
-1.5
-2.0
0.0
-1.0
-2.0
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
-40
-20
0
20
40
60
80
100
Input Voltage (V)
Temperature (°C)
Step-Down Converter
Switching Frequency vs. Temperature
(VIN = 3.6V; VO = 1.5V; EN = VIN; ENLDO = GND)
Step-Down Converter
Input Current vs. Input Voltage
(VO = 1.8V; EN = VIN; ENLDO = GND)
35
30
25
20
15
0.20
0.10
85°C
25°C
0.00
-0.10
-40°C
-0.20
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
-40
-20
0
20
40
60
80
100
Input Voltage (V)
Temperature (°°C)
2506.2005.12.1.0
9
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
