LTC4057 Datasheet, PDF (3/12 Pages) Linear Technology – Linear Li-Ion Battery Charger with Thermal Regulation in ThinSOT

LTC4057- 4.2
ELECTRICAL CHARACTERISTICS
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LTC4057 is guaranteed to meet performance specifications from
0°C to 70°C. Specifications over the –40°C to 85°C operating temperature
range are assured by design, characterization and correlation with statistical
process controls.
Note 3: See Thermal Considerations.
TYPICAL PERFOR A CE CHARACTERISTICS
PROG Pin Voltage vs Supply
Voltage (Constant Current Mode)
1.015
1.010
1.005
V_CC = 5V
V_BAT = 4V
T_A = 25°C
R_PROG = 10k
1.000
0.995
0.990
0.985
4.0 4.5 5.0 5.5 6.0
V_CC (V)
6.5 7.0
4057 G01
Regulated Output (Float) Voltage
vs Charge Current
4.26
V_CC = 5V
4.24 T_A = 25°C
R_PROG = 1.25k
4.22
4.20
4.18
4.16
4.14
4.12
4.10
0
100 200 300 400 500 600 700
I_BAT (mA)
4057 G04
PROG Pin Voltage vs Temperature
(Constant Current Mode)
1.0100
1.0075
1.0050
V_CC = 5V
V_BAT = 4V
R_PROG = 10k
1.0025
1.0000
0.9975
0.9950
0.9925
0.9900
–50
–25 0 25 50
TEMPERATURE (°C)
75 100
4057 G02
Regulated Output (Float) Voltage
vs Temperature
4.220
V_CC = 5V
4.215 R_PROG = 10k
4.210
4.205
4.200
4.195
4.190
4.185
4.180
–50 –25
0 25 50
TEMPERATURE (°C)
75 100
4057 G05
Charge Current vs PROG Pin
Voltage
600
V_CC = 5V
T_A = 25°C
500 _{RPROG = 2k}
400
300
200
100
0
0 0.25 0.50 0.75 1.00 1.25
V_PROG (V)
4057 G03
Regulated Output (Float) Voltage
vs Supply Voltage
4.215
4.210
T_A = 25°C
R_PROG = 10k
4.205
4.200
4.195
4.190
4.185
4.0 4.5 5.0 5.5 6.0
V_CC (V)
6.5 7.0
4057 G06
4057f
3