LTC4059_15 Datasheet, PDF (3/12 Pages) Linear Technology – 900mA Linear Li-Ion Battery Chargers with Thermal Regulation in 2 2 DFN

TYPICAL PERFOR A CE CHARACTERISTICS
LTC4059/LTC4059A
Battery Regulation (Float) Voltage
vs Battery Charge Current
4.26
V_CC = 5V
4.24 ^{TA = 25°C}
R_PROG = 2.43k
4.22
4.20
4.18
4.16
4.14
4.12
4.10
0
100 200 300 400 500
I_BAT (mA)
4059 G01
Charge Current vs Input Voltage
600
V_BAT = 3.85V
T_A = 25°C
500
R_PROG = 2.43k
400
THERMAL
LIMITING
300
200
R_PROG = 12.1k
100
0
4
5
6
V_CC (V)
PROG Pin Voltage
vs Charge Current
1.4
V_CC = 5V
1.2
T_A = 25°C
R_PROG = 2.43k
1.0
7
8
4059 G04
0.8
0.6
0.4
0.2
0
0
100 200 300 400 500
I_BAT (mA)
4059 F07
Battery Regulation (Float) Voltage
vs Temperature
4.24
V_CC = 5V
4.23 ^{IBAT = 2mA}
R_PROG = 2.43k
4.22
4.21
4.20
4.19
4.18
4.17
4.16
–50 –25 0
25 50 75 100
TEMPERATURE (°C)
4059 G02
Charge Current vs Battery Voltage
600
Li CC = 5V
LTC4059 ONLY
500
Li CC = 0V
400
LTC4059A
300
200
100 ^VCC ^{= 5V}
T_A = 25°C
R_PROG = 2.43k
0
2.5
3
3.5
V_BAT (V)
4
4.5
4059 G05
PROG Pin Voltage vs Temperature
(Constant Current Mode)
1.24
V_CC = 5V
V_BAT = 3.85V
1.23
1.22
R_PROG = 12.1k
1.21
R_PROG = 2.43k
1.20
1.19
1.18
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
4059 G08
Regulated Output (Float) Voltage
vs Supply Voltage
4.24
T_A = 25°C
4.23 ^{IBAT = 10mA}
R_PROG = 2.43k
4.22
4.21
4.20
4.19
4.18
4.17
4.16
4
5
6
7
8
V_CC (V)
4059 G03
Charge Current vs Ambient
Temperature with Thermal
Regulation
600
R_PROG = 2.43k
500
400
THERMAL CONTROL
LOOP IN OPERATION
300
200
R_PROG = 12.1k
100
V_CC = 5V
V_BAT = 3.85V
0
–50 –25 0 25 50 75
100 125
AMBIENT TEMPERATURE (°C)
4059 G06
Power FET “ON” Resistance
vs Temperature
1200
V_CC = 5V
1000 ^{IBAT = 100mA}
900
800
700
600
500
400
–50 –25 0
25 50
TEMPERATURE (°C)
75 100
4059 G09
4059fb
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