LTC4058X-4.2_15 Datasheet, PDF (3/12 Pages) Linear Technology – Standalone Linear Li-Ion Battery Charger with Thermal Regulation in DFN

LTC4058-4.2/LTC4058X-4.2
ELECTRICAL CHARACTERISTICS The q denotes specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C. V_CC = 5V, unless otherwise noted.
SYMBOL
T_LIM
R_ON
t_SS
t_RECHARGE
t_TERM
PARAMETER
Junction Temperature in Constant
Temperature Mode
Power FET “ON” Resistance
(Between V_CC and BAT)
Soft-Start Time
Recharge Comparator Filter Time
Termination Comparator Filter Time
CONDITIONS
I_BAT = 0 to I_BAT =1000V/R_PROG
V_BSENSE High to Low
I_BAT Drops Below I_CHG/10
MIN TYP MAX
120
600
100
0.75
2
4.5
400 1000 2500
UNITS
°C
mΩ
µs
ms
µs
Note 1: Absolute Maximum Ratings are those values beyond which the life
of the device may be impaired.
Note 2: The LTC4058E-4.2/LTC4058XE-4.2 are 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: Failure to solder the exposed backside of the package to the PC
board will result in a thermal resistance much higher than 40°C/W.
Note 4: Supply current includes PROG pin current (approximately 100µA)
but does not include any current delivered to the battery through the BAT
pin (approximately 100mA).
Note 5: For all Li-Ion applications, the BSENSE pin must be electrically
connected to the BAT pin.
Note 6: This parameter is not applicable to the LTC4058X.
Note 7: I_TERM is expressed as a fraction of measured full charge current
with indicated PROG resistor.
TYPICAL PERFOR A CE CHARACTERISTICS
PROG Pin Voltage vs Supply
Voltage (Constant Current Mode)
1.015
1.010
V_CC = 5V
V_BAT = V_BSENSE = 4V
T_A = 25°C
R_PROG = 10k
1.005
1.000
0.995
0.990
0.985
4 4.5 5 5.5 6
V_CC (V)
6.5 7
405842 G01
PROG Pin Voltage
vs Temperature
1.0100
1.0075
1.0050
V_CC = 5V
V_BAT = V_BSENSE = 4V
R_PROG = 10k
1.0025
1.0000
0.9975
0.9950
0.9925
0.9900
–50 –25 0
25 50 75 100
TEMPERATURE (°C)
405842 G02
Charge Current
vs PROG Pin Voltage
600
V_CC = 5V
T_A = 25°C
500 R_PROG = 2k
400
300
200
100
0
0 0.2 0.4 0.6 0.8
V_PROG (V)
1 1.2
405842 G03
sn405842 405842fs
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