Typical operating characteristics (continued) – Rainbow Electronics MAX8903A User Manual
Page 8
MAX8903A
2A 1-Cell Li+ DC-DC Charger for USB*
and Adapter Power
8
_______________________________________________________________________________________
Typical Operating Characteristics (continued)
(T
A
= +25°C, unless otherwise noted.)
200
μs/div
USB RESUME
5V/div
MAX8903A toc28
500mA/div
2V/div
500mA/div
475mA
-475mA
3V
0V
0A
3.6V
0A
3.6V
3.8V
BATTERY
CHARGER
SOFT-START
C
USB
CHARGING
V
USUS
I
USB
V
SYS
I
BAT
400
μs/div
DC CONNECT WITH NO USB
(R
SYS
= 25
Ω)
2V/div
MAX8903A toc22
5V/div
1A/div
1A/div
3.6V
3.84V
3.6V
3.44V
C
DC
CHARGING
C
SYS
CHARGING 850mA
-1A
BATTERY
CHARGER
SOFT-START
144mA
0A
V
SYS
V
BAT
I
DC
I
BAT
-I
BAT
= CHARGING
40
μs/div
DC DISCONNECT WITH NO USB
(R
SYS
= 25
Ω)
2V/div
MAX8903A toc23
5V/div
1A/div
1A/div
3.6V
3.68V
850mA
-1A
144mA
0A
V
SYS
V
BAT
I
DC
I
BAT
3.6V
-I
BAT
= CHARGING
100
µs/div
SYS LOAD TRANSIENT
(0 TO 1A)
50mV/div
AC COUPLED
MAX8903A toc24
500mA/div
0A
V
SYS
I
SYS
400
μs/div
USB CONNECT WITH NO DC
(R
SYS
= 25
Ω)
2V/div
MAX8903A toc25
5V/div
500mA/div
500mA/div
3.6V
C
USB
CHARGING
BATTERY
CHARGER
SOFT-START
144mA
V
SYS
V
USB
I
USB
I
BAT
3.5V
3.75V
5V
475mA
-330mA
100
μs/div
USB DISCONNECT WITH NO DC
(R
SYS
= 25
Ω)
2V/div
MAX8903A toc26
5V/div
500mA/div
500mA/div
3.6V
475mA
V
SYS
V
USB
I
USB
I
BAT
5V
144mA
-330mA
200
μs/div
USB SUSPEND
5V/div
MAX8903A toc27
500mA/div
2V/div
500mA/div
475mA
-475mA
V
USUS
I
USB
V
SYS
I
BAT
3V
0V
0A
3.7V
0A
DC CONNECT WITH
USB CONNECTED (R
SYS
= 25
Ω)
MAX8903A toc21
200
μs/div
I
DC
V
SYS
I
USB
I
BAT
2V/div
500mA/div
500mA/div
500mA/div
0A
3.6V
347mA
-I
BAT
= CHARGING
475mA
-335mA