Datasheet

MAX8903A–E/G/H/J/N/Y
2A 1-Cell Li+ DC-DC Chargers
for USB and Adapter Power
26
Maxim Integrated
Note 5: Typical values. See the Electrical Characteristics table for min/max values.
Note 6: Note that this also changes the timing for the prequal and fast-charge timers.
Note 7: See the
Power Enable on Battery Detection section for details.
Note 8: The MAX8903H is a newer version of the MAX8903C that is a recommended for new designs.
Selector Guide
The MAX8903_ is available in several options designat-
ed by the first letter following the root part number. The
basic architecture and functionality of the
MAX8903A–MAX8903E/MAX8903G/MAX8903Y are the
same. Their differences lie in certain electrical and
operational parameters. Table 6 outlines these differ-
ences.
Table 6. Selector Guide
PARAMETER MAX8903A MAX8903B MAX8903C MAX8903D MAX8903E MAX8903G MAX8903H MAX8903J MAX8903N MAX8903Y
Minimum SYS
Regulation
Voltage
(V
SYSMIN
)
3.0V 3.0V 3.4V 3.4V 3.0V 3.0V 3.4V 3.4V 3.4V 3.0V
SYS Regulation
Voltage
(V
SYSREG
)
4.4V 4.325V 4.4V 4.4V 4.325V 4.325V 4.4V 4.5V 4.4V 4.4V
Minimum
Allowable
Inductor
2.2µH 2.2µH 2.2µH 2.2µH 2.2µH 2.2µH 1µH 1µH 1µH 1µH
Switching
Frequency
4MHz 4MHz 4MHz 4MHz 4MHz 1MHz 4MHz 4MHz 4MHz 4MHz
SYS Load
Regulation
40mV/A 25mV/A 40mV/A 40mV/A 25mV/A 25mV/A 40mV/A 25mV/A 25mV/A 25mV/A
Mi ni mum SY S
Outp ut
Capaci tor ( C
SYS
)
10µF 22µF 10µF 10µF 22µF 22µF 10µF 10µF 22µF 22µF
BAT Regulation
Voltage
(V
BATREG
)
(Note 5)
4.2V 4.2V 4.2V 4.1V 4.1V 4.2V 4.2V 4.35V 4.15V 4.15V
BAT Prequal
Threshold
(V
BATPQ
)
(Note 5)
3V 2.5V 3V 3V 2.5V 2.5V 3V 3V 3V 3V
Top-Off Timer
(Note 6)
15s (fixed) 132min 15s (fixed) 15s (fixed) 132min 132min 15s (fixed) 15s (fixed) 15s (fixed) 15s (fixed)
VL Output
Current Rating
1mA 10mA 1mA 1mA 10mA 10mA 1mA 1mA 1mA 1mA
Power-Enable
On Battery
Detection
(Note 7)
No Yes No No Yes Yes No No No No
Comments — — — — — — (Note 8) — — —