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