Datasheet
MAX8903A–E/G/H/J/N/Y
2A 1-Cell Li+ DC-DC Chargers
for USB and Adapter Power
8
Maxim Integrated
NORMALIZED CHARGE CURRENT
vs. AMBIENT TEMPERATURE
MAX8903A toc10
TEMPERATURE (°C)
NORMALIZED CHARGE CURRENT
603510-15
0.990
0.995
1.000
1.005
1.010
1.015
0.985
-40 85
V
USB
= 5V, V
BAT
= 4V
NORMALIZED BATTERY
REGULATION VOLTAGE
vs. AMBIENT TEMPERATURE
MAX8903A toc11
TEMPERATURE (°C)
NORMALIZED BATTERY REGULATION VOLTAGE (%)
603510-15
99.6
99.7
99.8
99.9
100.0
100.1
100.2
100.3
100.4
100.5
99.5
-40 85
22ppm/
°
C
0
1.5
1.0
0.5
2.5
2.0
4.5
4.0
3.5
3.0
5.0
01234567
MAX8903A/C/D/H/N/Y
SYS VOLTAGE vs. USB VOLTAGE
MAX8903A toc12
USB VOLTAGE (V)
SYS VOLTAGE (V)
V
USB
FALLING
V
CEN
= 5V
V
BAT
= 0V
V
DC
= 0V
V
USB
RISING
R
SYS
= 1MΩ
0
1.0
0.5
2.0
1.5
3.0
2.5
3.5
4.5
4.0
5.0
0 4682 1012141618
MAX8903A/C/D/H/N/Y
SYS VOLTAGE vs. DC VOLTAGE
MAX8903A toc13
DC VOLTAGE (V)
SYS VOLTAGE (V)
V
DC
RISING
V
DC
FALLING
V
CEN
= 5V
V
BAT
= 0V
V
USB
= 0V
SYS VOLTAGE
vs. SYS OUTPUT CURRENT, DC INPUT
MAX8903A toc14
SYS OUTPUT CURRENT (A)
SYS VOLTAGE (V)
1.51.00.5
3.9
4.0
4.1
4.2
4.3
4.4
4.5
4.6
3.8
02.0
V
USB
= 0V
MAX8903J, V
DC
= 5.75V
MAX8903N/Y,
V
DC
= 5.75V
MAX8903A/C/D/H,
V
DC
= 5.75V
MAX8903B/E/G,
V
DC
= 5.75V
MAX8903_, V
DC
= 0V
400300200100
SYS VOLTAGE
vs. SYS OUTPUT CURRENT, USB INPUT
MAX8903A toc15
SYS OUTPUT CURRENT (mA)
SYS VOLTAGE (V)
3.9
4.0
4.1
4.2
4.3
4.4
4.5
4.6
3.8
0 500
V
DC
= 0V, V
BATT
= 4V
MAX8903J, V
USB
= 5V
MAX8903N/Y,
V
USB
= 5V
MAX8903A/C/D/H,
V
USB
= 5V
MAX8903B/E/G,
V
USB
= 5V
MAX8903_, V
USB
= 0V
VL VOLTAGE vs. DC VOLTAGE
MAX8903A toc16
DC VOLTAGE (V)
VL VOLTAGE (V)
18161412108642
1
2
3
4
5
6
0
020
VL WITH
NO LOAD AND
DCDC OFF
(V
USUS
= 5V)
VL AND DCDC
WITH
FULL LOAD
(V
USUS
= 0V)
V
BAT
= 3.6V
V
USB
= 0V
CHARGE PROFILE—1400mAh BATTERY
ADAPTER INPUT—1A CHARGE
MAX8903A toc17
TIME (min)
V
BAT
(V)
I
BAT
(A)
12010060 804020
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
0
0.2
0.4
0.6
0.8
1.0
1.2
0.0
0 140
V
BAT
I
DC
SET TO 1A
I
BAT
SET TO 2A
I
BAT
MAX8903A/B/C/G/H
Typical Operating Characteristics (continued)
(T
A
= +25°C, unless otherwise noted.)