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