AAT2500
1MHz Step-Down Converter/LDO Regulator
Typical Characteristics
Unless otherwise noted, VIN = 5V, TA = 25°C.
Over-Current Protection
(EN = GND; ENLDO = VIN)
LDO ENLDO vs. VIN
1200
1000
800
600
400
200
0
1.250
1.225
1.200
1.175
VIH
1.150
1.125
1.100
VIL
1.075
1.050
-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 = 2.5V; EN = VIN; ENLDO = GND)
Step-Down Converter Load Regulation
(VOUT = 2.5V; EN = VIN; ENLDO = GND)
100
2.0
1.0
VIN = 3.3V
VIN = 3.0V
90
80
70
60
VIN = 3.0V
VIN = 3.6V
0.0
VIN = 3.3V
-1.0
-2.0
VIN = 3.6V
0.1
1.0
10
100
1000
0.1
1.0
10
100
1000
Output Current (mA)
Output Current (mA)
Step-Down Converter Efficiency vs. Load
(VOUT = 1.8V; EN = VIN; ENLDO = GND)
Step-Down Converter DC Regulation
(VOUT = 1.8V; EN = VIN; ENLDO = GND)
100
90
80
70
60
50
2.0
1.0
VIN = 3.6V
VIN = 2.7V
VIN = 4.2V
0.0
VIN = 4.2V
VIN = 2.7V
VIN = 3.6V
-1.0
-2.0
0.1
1.0
10
100
1000
0.1
1.0
10
100
1000
Output Current (mA)
Output Current (mA)
8
2500.2006.05.1.16
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
