AAT2557
500mA Battery Charger and 300mA
LDO Regulator for Portable Systems
Typical Characteristics – Battery Charger
Operating Current vs. Temperature
Preconditioning Threshold Voltage
vs. Temperature
(RSET = 8.06kΩΩ)
(RSET = 8.06kΩ)
550
500
450
400
350
300
3.03
3.02
3.01
3
2.99
2.98
2.97
-50
-25
0
25
50
75
100
-50
-25
0
25
50
75
100
Temperature (°C)
Temperature (°C)
Preconditioning Charge Current
vs. Temperature
Preconditioning Charge Current
vs. Supply Voltage
(RSET = 8.06kΩΩ)
60
20.8
20.6
20.4
20.2
20.0
19.8
19.6
19.4
19.2
RSET = 3.24kΩ
50
40
30
20
10
0
RSET = 5.36kΩ
RSET = 8.06kΩ
RSET = 31.6kΩ
RSET = 16.2kΩ
4
4.2 4.4 4.6 4.8
5
5.2 5.4 5.6 5.8
6
6.2 6.4
-50
-25
0
25
50
75
100
Temperature (°C)
VADP (V)
Recharging Threshold Voltage
vs. Temperature
Sleep Mode Current vs. Supply Voltage
(RSET = 8.06kΩ)
(RSET = 8.06kΩΩ)
800
700
600
500
400
300
200
100
0
4.18
4.16
4.14
4.12
4.10
4.08
4.06
4.04
4.02
85°C
25°C
-40°C
-50
-25
0
25
50
75
100
4
4.25 4.5 4.75
5
5.25 5.5 5.75
6
6.25 6.5
Temperature (°C)
(V)
VADP
2557.2007.06.1.0
7
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
