AAT2557
500mA Battery Charger and 300mA
LDO Regulator for Portable Systems
Typical Characteristics – LDO Regulator
Dropout Voltage vs. Temperature
540
3.2
Dropout Characteristics
Dropout Voltage (mV)
480
420
360
300
240
180
120
60
0
I
L
= 300mA
3.0
I
OUT
= 0mA
Output Voltage (V)
2.8
2.6
2.4
2.2
2.0
2.7
I
L
= 150mA
I
L
= 100mA
I
OUT
= 300mA
I
OUT
= 150mA
I
OUT
= 10mA
2.8
I
L
= 50mA
-40 -30 -20 -10 0
10 20 30 40 50 60 70 80 90 100 110 120
I
OUT
= 100mA
I
OUT
= 50mA
2.9
3.0
3.1
3.2
3.3
Temperature (°C)
Input Voltage (V)
Dropout Voltage vs. Output Current
500
90
80
70
60
50
40
30
20
10
Ground Current vs. Input Voltage
Dropout Voltage (mV)
400
350
300
250
200
150
100
50
0
0
50
100
150
200
250
300
Ground Current (μA)
450
85°C
25°C
-40°C
I
OUT
=300mA
I
OUT
=0mA
I
OUT
=150mA
I
OUT
=50mA
I
OUT
=10mA
0
2
2.5
3
3.5
4
4.5
5
Output Current (mA)
Input Voltage (V)
Quiescent Current vs. Temperature
100
Output Voltage vs. Temperature
1.203
1.202
Quiescent Current (μA)
90
Output Voltage (V)
-40 -30 -20 -10
0
10 20 30 40 50 60 70 80 90 100 110 120
80
70
60
50
40
30
20
10
0
1.201
1.200
1.199
1.198
1.197
1.196
-40 -30 -20 -10
0
10 20
30
40
50 60
70 80
90 100
Temperature (°C)
Temperature (°C)
2557.2007.06.1.0
9
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
