AAT2557
500mA Battery Charger and 300mA
LDO Regulator for Portable Systems
Typical Characteristics – LDO Regulator
LDO Initial Power-Up Response Time
LDO Turn-On Time from Enable
(VIN Present)
6
4
3
2
1
0
5
4
3
2
1
0
4
3
2
1
0
3
2
1
0
Time (5µs/div)
Time (50µs/div)
Turn-Off Response Time
(IOUT = 100mA)
Line Transient Response
6
5
4
5
VIN
0
3
2
3.00
2.99
2.98
VOUT
1
0
Time (5µs/div)
Time (100µs/div)
Load Transient Response
(VOUT = 2.8V)
Load Transient Response 300mA
(VOUT = 2.8V)
2.90
2.85
2.80
2.75
3.0
2.9
2.8
2.7
VOUT
VOUT
400
300
200
100
0
100
0
IOUT
IOUT
Time (100µs/div)
Time (10µs/div)
10
2557.2007.06.1.0