AAT2506
1MHz Step-Down Converter/LDO Regulator
Typical Characteristics
Unless otherwise noted, V
IN
= 5V, T
A
= 25°C.
Over-Current Protection
(EN = GND; ENLDO = V
IN
)
1200
1.250
1.225
1.200
1.175
600
400
200
0
-200
1.150
1.125
1.100
1.075
1.050
2.5
3.0
3.5
4.0
4.5
5.0
5.5
LDO ENLDO vs. V
IN
Output Current (mA)
1000
800
V
IH
V
IL
Time (50ms/div)
Input Voltage (V)
Step-Down Converter Efficiency vs. Load
(V
OUT
= 3.3V; L = 10µH; ENLDO = GND)
µ
100
3.0
2.0
1.0
0.0
-1.0
-2.0
-3.0
1
10
100
1000
0.1
Step-Down Converter DC Regulation
(V
OUT
= 3.3V; L = 10µH; ENLDO = GND)
µ
Efficiency (%)
90
V
IN
= 3.9V
V
IN
= 4.2V
80
Output Error (%)
V
IN
= 4.2V
70
V
IN
= 3.9V
60
0.1
1
10
100
1000
Output Current (mA)
Output Current (mA)
Step-Down Converter Efficiency vs. Load
(V
OUT
= 2.5V; L = 10µH; ENLDO = GND)
µ
100
Step-Down Converter DC Regulation
(V
OUT
= 2.5V; L = 10µH; ENLDO = GND)
µ
3.0
V
IN
= 3.3V
Efficiency (%)
90
Output Error (%)
2.0
1.0
0.0
-1.0
-2.0
-3.0
V
IN
= 3.3V
V
IN
= 3.6V
V
IN
= 3.0V
80
V
IN
= 3.6V
V
IN
= 3.0V
70
60
0.1
1
10
100
1000
0.1
1
10
100
1000
Output Current (mA)
Output Current (mA)
8
2506.2005.12.1.0
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
