MAX8903A Maxim Integrated Products, MAX8903A Datasheet - Page 5

• Manufacturer Part Number: MAX8903A
• Description: 2A 1-Cell Li+ DC-DC Charger for USB* and Adapter Power
• Manufacturer: Maxim Integrated Products

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ELECTRICAL CHARACTERISTICS (continued)
(V
(Note 1)
Note 1: Limits are 100% production tested at T
Note 2: For the 100mA USB mode using the DC input, the step-down regulator is turned off and a low-dropout linear regulator is
Note 3: For the 500mA USB mode, the actual current drawn from USB is less than the output current due to the input/output current
Note 4: For short-circuit protection, SYS sources 25mA below V
(T
Logic Output Voltage, Low
(CHG, FLT, DOK, UOK)
Open-Drain Output Leakage
C ur rent, Hi g h (CHG , FLT, DOK, UOK)
VL Output Voltage
VL UVLO Threshold
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
DC
A
100
= +25°C, unless otherwise noted.)
90
80
70
60
50
40
30
20
10
0
= V
1.0
connected from DC to SYS.
ratio of the DC-DC converter.
V
USB
DC
BATTERY CHARGER EFFICIENCY
PARAMETER
1.5
= 8V
I
BATT
V
= 5V, V
vs. BATTERY VOLTAGE
DC
2.0
= 0.15A
= 5V
BATTERY VOLTAGE (V)
2.5
_______________________________________________________________________________________
BAT
3.0
= 4V, circuit of Figure 2, T
3.5
I
2A 1-Cell Li+ DC-DC Charger for USB*
BATT
V
I
DC
BATT
4.0
= 1.5A
= 12V
= 1.5A
4.5
Sinking 1mA
Sinking 10mA
V
V
V
OUT
DC
VL
5.0
falling; 200mV hysteresis
= V
= 5.5V
USB
A
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
= 6V, I
= +25°C. Limits over the operating temperature range are guaranteed by design.
A
4
= -40°C to +85°C, unless otherwise noted. Typical values are at T
VL
6
CONDITIONS
= 0 to 1mA
SWITCHING FREQUENCY
V
V
8
BAT
DC VOLTAGE (V)
BAT
SYS
vs. V
= 4V
= 3V
T
T
= 400mV, and 50mA for V
10
A
A
DC
= +25°C
= +85°C
Typical Operating Characteristics
12
R
CEN = 0V
ISET
= 1.2kΩ
14
and Adapter Power
16
100
SYS
90
80
70
60
50
40
30
20
10
0
MIN
1
4.6
between 400mV and 2V.
SYS EFFICIENCY vs. DC VOLTAGE
SYS OUTPUT CURRENT (mA)
10
0.001
TYP
0.01
160
3.2
80
15
5
8
100
V
V
MAX
DC
DC
5.4
50
V
1
= 6V
= 4.5V
DC
= 11V
1000
V
A
DC
= +25°C.)
= 16V
UNITS
mV
µA
°C
°C
V
V
10,000
5