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8 Maxim Integrated
1.2A Switch-Mode Li+ Chargers with ±22V Input
Rating and JEITA Battery Temperature Monitoring
MAX8900A/MAX8900B/MAX8900C
Typical Operating Characteristics
(Circuit of Figure 1, V
IN
= 6V, V
BAT
= 3.6V, T
A
= +25NC, unless otherwise noted.)
INPUT SUPPLY CURRENT
vs. INPUT VOLTAGE (DISABLED, V
BAT
= 0V)
MAX8900A toc01
V
IN
(V)
I
IN
(uA)
20100-10-20
0
20
40
60
80
100
120
-20
-30 30
V
CEN
= 3.0V
INPUT SUPPLY CURRENT
vs. INPUT VOLTAGE (DISABLED, V
BAT
= 3.6V
)
MAX8900A toc02
V
IN
(V)
I
IN
(uA)
20100-10-20
0
20
40
60
80
100
120
-20
-30 30
V
CEN
= 3.0V
INPUT SUPPLY CURRENT
vs. INPUT VOLTAGE (PREQUALIFICATION)
MAX8900A toc03
V
IN
(V)
I
IN
(mA)
105
20
40
60
80
100
120
0
01
5
MAX8900A
V
CEN
= 0V
V
BAT
= 2.6V
R
DNI
= 3.83kI
V
IN
RISING
V
IN
FALLING
INPUT SUPPLY CURRENT
vs. INPUT VOLTAGE (CHARGING AT 1.2A)
MAX8900A toc04
V
IN
(V)
I
IN
(A)
105
0.2
0.4
0.6
0.8
1.0
1.2
1.4
0
01
5
MAX8900A
V
CEN
= 0V
V
BAT
= 3.1V
R
SETI
= 2.87kI
V
IN
RISING
V
IN
FALLING
INPUT SUPPLY CURRENT
vs. INPUT VOLTAGE (V
IN2BAT
DETAIL)
MAX8900A toc05
V
IN
(V)
I
IN
(A)
6.55.54.5
0.2
0.4
0.6
0.8
1.0
1.2
0
3.5 7.5
V
CEN
= 0V
V
BAT
= 4.0V
R
SETI
= 3.01kI
V
IN
RISING
V
IN
FALLING
R
L
= 90mIMAX8900A
CHARGE CURRENT
vs. BATTERY VOLTAGE
MAX8900A toc06
V
BAT
(V)
I
BAT
(A)
54321
0.2
0.4
0.6
0.8
1.0
1.2
1.4
0
06
R
SETI
= 2.87kI
R
SETI
= 3.40kI
R
SETI
= 6.81kI
R
SETI
= 34.0kI
R
DNI
= 3.83kI
V
CEN
= 0V
V
IN
= 6.0V
MAX8900A/
MAX8900B
INPUT SUPPLY CURRENT AND
CHARGE CURRENT vs. INPUT VOLTAGE
MAX8900A toc07
V
IN
(V)
CURRENT (A)
6.55.54.5
0.2
0.4
0.6
0.8
1.0
1.2
0
3.5 7.5
MAX8900A
V
CEN
= 0V
V
BAT
= 4.0V
R
SETI
= 3.01kI
V
IN
FALLING
I
BAT
I
IN
BATTERY REGULATION VOLTAGE
vs. AMBIENT TEMPERATURE
MAX8900A toc08
AMBIENT TEMPERATURE (°C)
NORMALIZED V
BAT
603510-15
0.992
0.994
0.996
0.998
1.000
1.002
1.004
1.006
1.008
1.010
0.990
-40 85
V
CEN
= 0V
V
BAT
= UNCONNECTED
V
IN
= 5.0V
V
THM
= V
AVL
/2
BATTERY REGULATION VOLTAGE
vs. INPUT VOLTAGE
MAX8900A toc09
V
IN
(V)
NORMALIZED V
BAT
8765
0.992
0.994
0.996
0.998
1.000
1.002
1.004
1.006
1.008
1.010
0.990
49
MAX8900B
V
CEN
= 0V
V
BAT
= UNCONNECTED