Datasheet

MAX8808X/MAX8808Y/MAX8808Z
1A Linear Li+ Battery Chargers with Integrated Pass
FET and Thermal Regulation in 2mm x 2mm TDFN
_______________________________________________________________________________________ 3
Note 1: Specifications are 100% production tested at T
A
= +25°C. Limits over the operating temperature range are guaranteed by
design and characterization.
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= 5V, V
BATT
= 4.0V, R
ACOK
= R
CHG
= 100kΩ to 5V, EN = unconnected (for the MAX8808X and MAX8808Z), EN = VL (for the
MAX8808Y), R
ISET
= 2.8kΩ to GND, C
VL
= 0.47µF, C
BATT
= 1µF, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at
T
A
= +25°C.) (Note 1)
PARAMETER CONDITIONS
MIN TYP MAX
UNITS
Prequal Charge Current
Percentage of the fast-charge current, V
BATT
= 2.2V,
MAX8808X
51015%
Die Temperature Regulation
Threshold
+115
°C
V
BATT
Prequal Threshold Voltage
V
BATT
rising, MAX8808X 2.3 2.5 2.7 V
Current-Sense Amplifier Gain,
I
BATT
to I
ISET
I
BAT T
= 500m A, V
IS E T
= 1.4V
T
A
= 0°C to +85°C
0.97 1.08 1.19
mA/A
Regulator Dropout Voltage
(V
IN
- V
BATT
)
V
BATT
= 4.1V, I
BATT
= 425mA
250
430 mV
EN/EN Logic Input Low Voltage 4.25V < V
IN
< 6.5V
0.52
V
EN/EN Logic Input High Voltage 4.25V < V
IN
< 6.5V 1.3 V
EN Internal Pulldown Resistor MAX8808X and MAX8808Z only
100 200
400 kΩ
T
A
= +25°C 1
EN Input Leakage Current MAX8808Y, V
EN
= 5.5V
T
A
= +85°C
0.002
µA
CHG Output Low Voltage I
CHG
= 5mA 0.4 V
T
A
= +25°C 1
CHG Output High Leakage
Current
V
CHG
= 5.5V
T
A
= +85°C
0.002
µA
ACOK Output Low Voltage I
ACOK
= 5mA 0.4 V
T
A
= +25°C 1
ACOK Output High Leakage
Current
V
ACOK
= 5.5V
T
A
= +85°C
0.002
µA
Full-Battery Detection Current
Threshold
I
BATT
falling, percentage of the fast-charge current 5 10 15 %