Typical operating characteristics (continued) – Rainbow Electronics MAX8903A User Manual
Page 6
MAX8903A
2A 1-Cell Li+ DC-DC Charger for USB*
and Adapter Power
6
_______________________________________________________________________________________
Typical Operating Characteristics (continued)
(T
A
= +25°C, unless otherwise noted.)
0
0.4
0.2
0.8
0.6
1.4
1.2
1.0
1.6
0
2
1
3
4
5
6
7
USB QUIESCENT CURRENT
vs. USB VOLTAGE
MAX8903A toc04
USB VOLTAGE (V)
USB QUIESCENT CURRENT (mA)
CHARGER
ENABLED
CHARGER
DISABLED
0
40
20
80
60
120
100
140
0
2
3
1
4
5
6
7
USB QUIESCENT CURRENT
vs. USB VOLTAGE
MAX8903A toc05
USB VOLTAGE (V)
USB QUIESCENT CURRENT (
μ
A)
USB SUSPEND
0
20
10
40
30
70
60
50
80
0
4
5
6
3
2
1
BATTERY LEAKAGE CURRENT
vs. BATTERY VOLTAGE
MAX8903A toc06
BATTERY VOLTAGE (V)
BATTERY LEAKAGE CURRENT (nA)
USB UNCONNECTED
0
20
10
40
30
70
80
60
50
90
-40
35
60
-15
10
85
BATTERY LEAKAGE CURRENT
vs. AMBIENT TEMPERATURE
MAX8903A toc07
TEMPERATURE (
°C)
BATTERY LEAKAGE CURRENT (nA)
0
100
50
200
150
300
250
350
450
400
500
0
4
2
1
3
5
CHARGE CURRENT
vs. BATTERY VOLTAGE—USB
MAX8903A toc08
BATTERY VOLTAGE (V)
CHARGE CURRENT (mA)
CHARGER ENABLED
I
BAT
SET TO 1.5A
V
IUSB
= 0V
V
IUSB
= V
USB
0
200
100
400
300
600
500
700
900
800
1000
0
4
2
3
1
5
CHARGE CURRENT
vs. BATTERY VOLTAGE—DC MODE
MAX8903A toc09
BATTERY VOLTAGE (V)
CHARGE CURRENT (mA)
CHARGER ENABLED
I
BAT
SET TO 1.5A
I
DC
SET TO 1A
NORMALIZED CHARGE CURRENT
vs. AMBIENT TEMPERATURE
MAX8903A toc10
TEMPERATURE (
°C)
NORMALIZED CHARGE CURRENT
60
35
10
-15
0.990
0.995
1.000
1.005
1.010
1.015
0.985
-40
85
V
USB
= 5V, V
BATT
= 4V
BATTERY REGULATION VOLTAGE
vs. AMBIENT TEMPERATURE
MAX8903A toc11
TEMPERATURE (
°C)
BATTERY REGULATION VOLTAGE (V)
60
35
10
-15
4.185
4.190
4.195
4.200
4.205
4.180
-40
85
0
1.5
1.0
0.5
2.5
2.0
4.5
4.0
3.5
3.0
5.0
0
1
2
3
4
5
6
7
SYS VOLTAGE vs. USB VOLTAGE
MAX8903A toc12
USB VOLTAGE (V)
SYS VOLTAGE (V)
V
USB
FALLING
V
USB
RISING
R
SYS
= 1M
Ω