LTC4054X-4.2_15 Datasheet, PDF (5/16 Pages) Linear Technology – Standalone Linear Li-Ion Battery Charger with Thermal Regulation in ThinSOT

LTC4054-4.2/LTC4054X-4.2
TYPICAL PERFOR A CE CHARACTERISTICS
CHRG Pin Current vs Temperature
(Weak Pull-Down State)
28
V_CC = 5V
V_BAT = 4.3V
25 _{VCHRG = 5V}
23
19
16
13
10
–50 –25 0
25 50
TEMPERATURE (°C)
75 100
4054 G13
Trickle Charge Threshold vs
Temperature
3.000
V_CC = 5V
2.975 ^RPROG ^{= 10k}
2.950
2.925
2.900
2.875
2.850
2.825
2.800
–50 –25 0
25 50
TEMPERATURE (°C)
75 100
4054 G16
Charge Current vs Ambient
Temperature
600
R_PROG = 2k
500
400
V_CC = 5V
300 V_BAT = 4V
θ_JA = 80°C/W
200
ONSET OF
THERMAL
REGULATION
R_PROG = 10k
100
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
4054 G19
Trickle Charge Current
vs Temperature
50
R_PROG = 2k
40
30
V_CC = 5V
V_BAT = 2.5V
20
10
R_PROG = 10k
0
–50 –25 0
25 50
TEMPERATURE (°C)
75 100
4054 G14
Charge Current vs Battery Voltage
600
T_A = 0°C
500
400
T_A = 40°C
T_A = 25°C
300
200
100
V_CC = 5V
θ_JA = 125°C/W
R_PROG = 2k
0
2.7 3.0 3.3 3.6 3.9 4.2 4.5
V_BAT (V)
4054 G17
Recharge Voltage Threshold
vs Temperature
4.11
V_CC = 5V
4.09 ^{RPROG = 10k}
4.07
4.05
4.03
4.01
3.99
–50 –25
0 25 50
TEMPERATURE (°C)
75 100
4054 G20
Trickle Charge Current vs
Supply Voltage
50
R_PROG = 2k
40
30
V_BAT = 2.5V
T_A = 25°C
20
10
R_PROG = 10k
0
4.0 4.5 5.0 5.5 6.0
V_CC (V)
6.5 7.0
4054 G15
Charge Current vs Supply Voltage
600
R_PROG = 2k
500
400
V_BAT = 4V
300 TA = 25°C
θ_JA = 80°C/W
ONSET OF
THERMAL
REGULATION
200
R_PROG = 10k
100
0
4.0 4.5 5.0 5.5 6.0
V_CC (V)
6.5 7.0
4054 G18
Power FET “ON” Resistance
vs Temperature
700
V_CC = 4.2V
650
I_BAT = 100mA
R_PROG = 2k
600
550
500
450
400
350
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
4054 G21
405442xf
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