Datasheet

3
LTC4054-4.2/LTC4054X-4.2
405442xf
Note 1: Absolute Maximum Ratings are those values beyond which the life
of the device may be impaired.
Note 2: The LTC4054E-4.2 and the LTC4054XE-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: See Thermal Considerations.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
T
LIM
Junction Temperature in Constant 120 °C
Temperature Mode
R
ON
Power FET “ON” Resistance 600 mΩ
(Between V
CC
and BAT)
t
SS
Soft-Start Time I
BAT
= 0 to I
BAT
=1000V/R
PROG
100 µs
t
RECHARGE
Recharge Comparator Filter Time V
BAT
High to Low 0.75 2 4.5 ms
t
TERM
Termination Comparator Filter Time I
BAT
Falling Below I
CHG
/10 400 1000 2500 µs
I
PROG
PROG Pin Pull-Up Current 3 µA
The ● denotes specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 5V, unless otherwise noted.
ELECTRICAL CHARACTERISTICS
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: This parameter is not applicable to the LTC4054X.
Note 6: I
TERM
is expressed as a fraction of measured full charge current
with indicated PROG resistor.
TYPICAL PERFOR A CE CHARACTERISTICS
UW
PROG Pin Voltage vs Supply
Voltage(Constant Current Mode)
PROG Pin Voltage vs
Temperature
Charge Current vs
PROG Pin Voltage
V
PROG
(V)
V
CC
(V)
4.0
V
PROG
(V)
1.015
1.010
1.005
1.000
0.995
0.990
0.985
4.5
5.0 5.5 6.0
4054 G01
6.5 7.0
TEMPERATURE (°C)
–50 –25 0 5025
75
100
4054 G02
1.0100
1.0075
1.0050
1.0025
1.0000
0.9975
0.9950
0.9925
0.9900
V
PROG
(V)
0
I
BAT
(mA)
600
500
400
300
200
100
0
0.25 0.50 0.75 1.00
4054 G03
1.25
V
CC
= 5V
V
BAT
= 4V
T
A
= 25°C
R
PROG
= 10k
V
CC
= 5V
V
BAT
= 4V
R
PROG
= 10k
V
CC
= 5V
T
A
= 25°C
R
PROG
= 2k