Datasheet

9
Maxim Integrated
Dual-Input Linear Charger, Smart Power Selector
with Advanced Battery Temperature Monitoring
MAX8934G
Typical Operating Characteristics (continued)
(T
A
= +25NC, circuit of Figure 2, V
DC
= 6V, V
BATT
= 3.6V, thermistor Beta = 3964, unless otherwise noted. Negative battery current
indicates charging.)
USB CONNECT WITH NO DC
(R
SYS
= 22I)
MAX8934G toc22
5V
3.3V
3.3V
3.3V
-150mA
475mA
3.7V4.3V
-1A
5V/div
5V/div
5V/div
5V/div
500mA/div
500mA/div
V
USB
I
USB
V
SYS
V
UOK
I
BATT
200µs/div
BATTERY CHARGER
SOFT-START
C
SYS
CHARGING
C
DC
CHARGING
-307mA
V
CHG
USB SUSPEND (R
SYS
= 22I)
MAX8934G toc24
3.3V
5V/div
V
USUS
V
SYS
I
USB
200µs/div
3.7V
-307mA
3.6V
3.3V
V
CHG
I
BATT
475mA
0A
0V
160mA
V
USB
= 5V
5V/div
5V/div
500mA/div
500mA/div
LDO OUTPUT VOLTAGE vs. LDO OUTPUT
CURRENT (USB DISCONNECTED)
MAX8934G toc26
LDO OUTPUT CURRENT (mA)
LDO OUTPUT VOLTAGE (V)
15012525 50 75 100
3.00
3.05
3.10
3.15
3.20
3.25
3.30
3.35
2.95
0 175
V
DC
= 5.0V
V
BATT
= 4.0V
DC UNCONNECTED
DC DISCONNECT WITH NO USB
(R
SYS
= 22I)
MAX8934G toc21
3.6V
3.6V
4V
0A
-1A
1A/div
5V/div
5V/div
1A/div
V
BATT
V
SYS
I
DC
I
BATT
200µs/div
160mA
-I
BATT
= CHARGING
1.2A
USB DISCONNECT WITH NO DC
(R
SYS
= 22I)
MAX8934G toc23
4.2V
0V
5V/div
V
USB
V
SYS
I
USB
200µs/div
0mA
3.7V
3.6V
3.3V
3.3V
V
UOK
I
BATT
V
CHG
-307mA
475mA
160mA
5V/div
5V/div
5V/div
500mA/div
500mA/div
USB RESUME (R
SYS
= 22I)
MAX8934G toc25
5V/div
V
USUS
V
SYS
I
USB
200µs/div
3.7V
3.6V
4.3V
3.3V
V
CHG
I
BATT
3V
0A
160mA
475mA
V
USB
= 5V
5V/div
5V/div
500mA/div
500mA/div
0V
-307mA
BATTERY CHARGER
SOFT-START