Datasheet

MAX8903G SWITCHING
FREQUENCY vs. V
DC
MAX8903A toc02a
DC VOLTAGE (V)
SWITCHING FREQUENCY (MHz)
14126 8 10
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
0
416
V
BAT
= 3V
V
BAT
= 4V
R
ISET
= 1.2k
I
V
CEN
= 0V
MAX8903A/B/C/D/E/H/J/N/Y
SYS EFFICIENCY
vs. SYS OUTPUT CURRENT
MAX8903A toc03
SYS OUTPUT CURRENT (mA)
SYS EFFICIENCY (%)
100010010
10
20
30
40
50
60
70
80
90
100
0
1 10000
V
CEN
= 1V
V
SYS
= 4.4V
V
DC
= 4.5V
V
DC
= 6V
V
DC
= 11V
V
DC
= 16V
MAX8903G SYS EFFICIENCY
vs. SYS OUTPUT CURRENT
MAX8903A toc03a
SYS OUTPUT CURRENT (mA)
SYS EFFICIENCY (%)
100010010
10
20
30
40
50
60
70
80
90
100
0
1 10,000
V
DC
= 16V
V
DC
= 12V
V
DC
= 9V
V
DC
= 6V
V
CEN
= 1
0
0.4
0.2
0.8
0.6
1.4
1.2
1.0
1.6
02134567
USB SUPPLY CURRENT
vs. USB VOLTAGE
MAX8903A toc04
USB VOLTAGE (V)
USB SUPPLY CURRENT (mA)
CHARGER
ENABLED
CHARGER
DISABLED
0
40
20
80
60
120
100
140
0231 4567
USB SUPPLY CURRENT
vs. USB VOLTAGE (SUSPEND)
MAX8903A toc05
USB VOLTAGE (V)
USB QUIESCENT CURRENT (µA)
USB SUSPEND
0
20
10
40
30
70
60
50
80
0456321
BATTERY LEAKAGE CURRENT
vs. BATTERY VOLTAGE
MAX8903A toc06
BATTERY VOLTAGE (V)
BATTERY LEAKAGE CURRENT (nA)
NO DC OR USB INPUT
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)
NO DC OR USB INPUT
CHARGE CURRENT
vs. BATTERY VOLTAGE—USB MODE
MAX8903A toc08
BATTERY VOLTAGE (V)
CHARGE CURRENT (mA)
4.03.53.02.52.0
50
100
150
200
250
300
350
400
450
500
0
1.5 4.5
CHARGE ENABLED
I
BAT
SET TO 1.5A
MAX8903D
V
BAT
RISING
V
IUSB
= V
USB
V
IUSB
= 0V
CHARGE CURRENT
vs. BATTERY VOLTAGE—DC MODE
MAX8903A toc09
BATTERY VOLTAGE (V)
CHARGE CURRENT (mA)
4.03.53.02.52.0
200
400
600
800
1000
1200
0
1.5 4.5
CHARGER ENABLED
I
BAT
SET TO 1A
I
DC
SET TO 2A
MAX8903A/C/H
V
BAT
RISING
Typical Operating Characteristics (continued)
(T
A
= +25°C, unless otherwise noted.)
MAX8903A–E/G/H/J/N/Y
2A 1-Cell Li+ DC-DC Chargers
for USB and Adapter Power
7
Maxim Integrated