Datasheet

12 Maxim Integrated
1.2A Switch-Mode Li+ Chargers with ±22V Input
Rating and JEITA Battery Temperature Monitoring
MAX8900A/MAX8900B/MAX8900C
Typical Operating Characteristics (continued)
(Circuit of Figure 1, V
IN
= 6V, V
BAT
= 3.6V, T
A
= +25NC, unless otherwise noted.)
5V IN CONNECT
MAX8900A toc31
0A
R
SETI
= 6.81kI
2V/div
5V/div
500mA/div
I
BAT
V
LX
V
IN
400µs/div
BATTERY CONNECT
MAX8900A toc32
0A
R
SETI
= 2.87kI
1.2A
3.6V
4.2V
6V
5V/div
2V/div
500mA/div
I
BAT
V
BAT
V
IN
20µs/div
BATTERY DISCONNECT
MAX8900A toc33
0A
R
SETI
= 2.87kI
4.2V
3.6V
1.2A
6V
5V/div
2V/div
500mA/div
I
BAT
V
BAT
V
IN
400µs/div
SOFT-START INTO RESISTIVE
SOURCE, R
SETI
= 6.81kI
MAX8900A toc34
0A
2V/div
2V/div
V
SOURCE
= 4.8V,
V
BAT
= 4V
1I BETWEEN
SOURCE AND IN
500mA/div
I
BAT
V
LX
V
IN
2ms/div
SOFT-START INTO RESISTIVE
SOURCE (R
SETI
= 2.87kI)
MAX8900A toc35
0A
5V/div
2V/div
V
SOURCE
= 4.8V, V
BAT
= 4V
1I BETWEEN SOURCE AND IN
500mA/div
I
BAT
V
LX
V
IN
2ms/div