Datasheet

LTC4054L-4.2
3
4054l42fa
elecTrical characTerisTics
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LTC4054LE-4.2 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.
Note 4: Supply current includes PROG pin current (≈1mA) but does not
include any current delivered to the battery through the BAT pin.
Note 5: I
TERM
is expressed as a fraction of measured full charge current
with indicated PROG resistor.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
I
TERM
C/10 Termination Current Threshold R
PROG
= 15k (I
BAT
= 10mA) (Note 5)
R
PROG
= 1k (I
BAT
= 150mA) (Note 5)
l
l
0.085
0.088
0.10
0.10
0.115
0.112
mA/mA
mA/mA
V
PROG
PROG Pin Voltage R
PROG
= 1k, Current Mode
l
0.93 1 1.07 V
I
CHRG
CHRG Pin Weak Pull-Down Current V
CHRG
= 5V 8 20 35 µA
V
CHRG
CHRG Pin Output Low Voltage I
CHRG
= 5mA 0.35 0.6 V
∆V
RECHRG
Recharge Battery Hysteresis Voltage V
FLOAT
– V
RECHRG
100 150 200 mV
T
LIM
Junction Temperature in Constant
Temperature Mode
120 °C
R
ON
Power FET “ON” Resistance
(Between V
CC
and
BAT
)
1.5 Ω
t
SS
Soft-Start Time I
BAT
= 0 to I
BAT
=150V/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
Drops Below I
CHG
/10 400 1000 2500 µs
I
PROG
PROG Pin Pull-Up Current 1.5 3 5 µA
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 5V, unless otherwise noted.
Typical perForMance characTerisTics
PROG Pin Voltage vs Supply
Voltage (Constant Current Mode)
PROG Pin Voltage vs Temperature
(Constant Current Mode)
Charge Current
vs PROG Pin Voltage
V
CC
(V)
4
V
PROG
(V)
0.9975
1.0000
1.0025
5.5
6.5
4054L G01
0.9950
0.9925
0.9900
4.5 5 6
1.0050
1.0075
1.0100
7
V
CC
= 5V
V
BAT
= 4V
T
A
= 25°C
R
PROG
= 1k
R
PROG
= 15k
TEMPERATURE (°C)
–50
V
PROG
(V)
0.9975
1.0000
1.0025
25
75
4054L G02
0.9950
0.9925
0.9900
–25 0 50
1.0050
1.0075
1.0100
100
V
CC
= 5V
V
BAT
= 4V
R
PROG
= 1k
V
PROG
(V)
0
0
I
BAT
(mA)
30
60
90
120
150
180
0.25 0.5 0.75 1
4054L G03
1.25
V
CC
= 5V
R
PROG
= 1k
T
A
= 25°C