Manual

MAX1508
Linear Li+ Battery Charger with Integrated Pass FET,
Thermal Regulation, and
ACOK in 3mm x 3mm TDFN
4 _______________________________________________________________________________________
Typical Operating Characteristics
(V
IN
= 5V, V
BATT
= 4.0V, ACOK = EN = CHG = unconnected, R
ISET
= 2.8kΩ to GND, C
IN
= 1µF, C
BATT
= 1µF, C
VL
= 0.47µF, T
A
=
+25°C, unless otherwise noted.)
0
0.5
1.0
1.5
2.0
SUPPLY CURRENT
vs. INPUT VOLTAGE
MAX1508 toc01
INPUT VOLTAGE (V)
SUPPLY CURRENT (mA)
0
6
8
2
410
12
I
BATT
= 0
0
0.5
1.0
1.5
2.0
DISABLED-MODE SUPPLY
CURRENT vs. INPUT VOLTAGE
MAX1508 toc02
INPUT VOLTAGE (V)
DISABLED-MODE SUPPLY CURRENT (mA)
0
EN = VL
6
8
4210
12
0
250
150
450
350
550
200
100
400
300
500
600
02.01.0 3.0 4.00.5 2.51.5 3.5 4.5
CHARGE CURRENT
vs. BATTERY VOLTAGE
MAX1508 toc03
BATTERY VOLTAGE (V)
CHARGE CURRENT (mA)
0
50
250
150
450
350
550
200
100
400
300
500
600
06824 101217935 1113
CHARGE CURRENT
vs. INPUT VOLTAGE
MAX1508 toc04
INPUT VOLTAGE (V)
CHARGE CURRENT (mA)
0
200
100
400
300
500
50
250
150
450
350
550
600
0 0.160.08 0.24 0.400.04 0.200.12 0.28 0.32 0.36
CHARGE CURRENT
vs. INPUT-VOLTAGE HEADROOM
MAX1508 toc05
V
IN
- V
BATT
(V)
CHARGE CURRENT (mA)
4.180
4.186
4.198
4.192
4.204
4.189
4.183
4.201
4.195
4.207
4.210
-40 10-15 35 60 85
BATTERY REGULATION VOLTAGE
vs. TEMPERATURE
MAX1508 toc06
TEMPERATURE (
°
C)
BATTERY REGULATION VOLTAGE (V)
600
560
520
460
420
580
540
480
500
440
-40 10-15 35 60 85
CHARGE CURRENT
vs. AMBIENT TEMPERATURE
MAX1508 toc07
AMBIENT TEMPERATURE (°C)
CHARGE CURRENT (mA)
0
200
600
400
800
100
300
700
500
900
1000
-40 10-15 35 60 85
CHARGE CURRENT
vs. AMBIENT TEMPERATURE
MAX1508 toc09
AMBIENT TEMPERATURE (°C)
CHARGE CURRENT (mA)
V
BATT
= 4.0V
V
BATT
= 3.6V
R
ISET
= 1.87kΩ