Datasheet

MAX8903A–E/G/H/J/N/Y
2A 1-Cell Li+ DC-DC Chargers
for USB and Adapter Power
4
Maxim Integrated
PARAMETER CONDITIONS MIN TYP MAX UNITS
BATTERY CHARGER
T
A
= +25°C 4.179 4.200 4.221
MAX8903A/B/C/G/H
T
A
= -40°C to +85°C 4.158 4.200 4.242
T
A
= +25°C 4.079 4.100 4.121
MAX8903D/E
T
A
= -40°C to +85°C 4.059 4.100 4.141
T
A
= +25°C 4.328 4.350 4.372
MAX8903J
T
A
= -40°C to +85°C 4.307 4.350 4.394
T
A
= +25°C 4.129 4.150 4.171
BAT Regulation Voltage
(V
BATREG
)
I
BAT
= 0mA
MAX8903Y/N
T
A
= -40°C to +85°C 4.109 4.150 4.192
V
C har g er Restar t Thr eshol d
Change in V
BAT
from DONE to fast-charge -150 -100 -60 mV
MAX8903A/C/D/H/J/N/Y 2.9 3.0 3.1
BAT Prequal Threshold (V
BATPQ
)
V
BAT
rising 180mV
hystersis
MAX8903B/E/G 2.4 2.5 2.6
V
Prequal Charge Current Percentage of fast-charge current set at ISET 10 %
R
ISET
= 600Ω 1800 2000 2200
R
ISET
= 1.2kΩ (MAX8903A/C/D) 900 1000 1100Fast-Charge Current
R
ISET
= 2.4kΩ 450 500 550
mA
DONE Threshold (I
TERM
) Percentage of fast-charge, I
BAT
decreasing 10 %
R
ISET
Resistor Range 0.6 2.4 kΩ
ISET Output Voltage 1.5 V
ISET Current Monitor Gain 1.25 mA/A
No DC or USB input 0.05 4
BAT Leakage Current
With valid input power, V
CEN
= 5V 3 6
µA
Charger Soft-Start Time 1.0 ms
Charger Thermal Limit
Temperature
100 °C
Charger Thermal Limit Gain Charge current = 0 at + 120°C 5 %/°C
CHARGER TIMER
Prequalification Time C
CT
= 0.15µF 33 min
Fast-Charge Time C
CT
= 0.15µF 660 min
MAX8903A/C/D/H/J/N/Y (fixed) 15 s
Top-Off Timer (t
TOP-OFF
)
MAX8903B/E/G, C
CT
= 0.15µF 132 min
Timer Accuracy -15 +15 %
Timer Extend Current Threshold
Percentage of fast-charge current below which the timer
clock operates at half-speed
40 50 60 %
Timer Suspend Current Threshold
Percentage of fast-charge current below which timer
clock pauses
16 20 24 %
ELECTRICAL CHARACTERISTICS (continued)
(V
DC
= V
USB
= 5V, V
BAT
= 4V, circuit of Figure 2, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.)
(Note 1)