LTC4067
4
4067f
The ● denotes the specifi cations which apply over the full operating
temperature range (Note 3), otherwise specifi cations are at T
A
= 25°C. Note 2 unless otherwise noted, V
IN
= 5V, V
BAT
= 3.7V,
V
ILIM0
= 0V, V
ILIM1
= 0V, R
PROG
= 2k, R
CLPROG
= 2k, V
OVI
= 0V, V
NTC
= V
IN
/2.
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: Current into a pin is positive and current out of a pin is negative.
All Voltages referenced to GND
Note 3: The LTC4067 is guaranteed to meet performance specifi cations
from 0°C to 85°C. Specifi cations over the –40°C to 85°C ambient
operating temperature range are assured by design, characterization and
correlation with statistical process controls.
Note 4: Specifi cation is guaranteed by design and not 100% tested in
production.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
NTC
I
NTC
NTC Input Leakage Current V
NTC
= 2.5V 0 ±1 μA
V
COLD
Cold Temperature Fault Threshold
Voltage
Rising Threshold
Hysteresis
0.725 • V
IN
0.733 • V
IN
0.02 • V
IN
0.741 • V
IN
V
V
V
HOT
Hot Temperature Fault Threshold
Voltage
Falling Threshold
Hysteresis
0.287 • V
IN
0.29 • V
IN
0.02 • V
IN
0.293 • V
IN
V
V
V
DIS
NTC Disable Voltage NTC Input voltage to GND (Falling)
Hysteresis
●
80 100
30
120 mV
mV
Logic
F
MOD
Serrated Fault Pulse Modulation
Frequency at
⎯
C
⎯
H
⎯
R
⎯
G Pin
(V
DIS
< V
NTC
< V
HOT
) or (V
NTC
> V
COLD
)
V
BAT
< 2.9V for Longer Than Trickle Charge Time
1.5
6
Hz
Hz
F
PW
Serrated Fault Pulse Width at
⎯
C
⎯
H
⎯
R
⎯
G
Pin
(V
DIS
< V
NTC
< V
HOT
) or (V
NTC
> V
COLD
)
V
BAT
< 2.9V for Longer Than Trickle Charge Time
1.33
2.62
μs
μs
F
TF
Serrated Fault Pulse Frequency at
⎯
C
⎯
H
⎯
R
⎯
G Pin
(V
DIS
< V
NTC
< V
HOT
) or (V
NTC
> V
COLD
) or
V
BAT
< 2.9V for Longer Than Trickle Charge Time
35 kHz
V
OL
Output Low Voltage (
⎯
C
⎯
H
⎯
R
⎯
G) I
SINK
= 5mA
●
1.5 V
V
IH
Enable Input High Voltage ILIM0, ILIM1 Pin Low to High
●
1.2 V
V
lL
Enable Input Low Voltage ILIM0, ILIM1 Pin High to Low
●
0.4 V
I
PULLDN
Logic Input Pull Down Current ILIM0, ILIM1 2 μA
V
OVTH
Overvoltage Protection Threshold
(OVI Pin)
V
OVI
Rising Threshold
Hysteresis
5.8 6
250
6.2 V
mV
V
PROG,SD
Shutdown Threshold V
CC
– V
PROG
Rising (Note 6)
Hysteresis
1.4
50
V
mV
I
PROG,PULLUP
PROG Pin Shutdown Sense Current V
PROG
= 1V 3.5 μA
Note 5: This IC includes over-temperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature exceeds 125°C when over-temperature protection is active.
Continuous operation above the specifi ed maximum operating junction
temperature may result in device degradation or failure.
Note 6: V
CC
is the greater of V
IN
, V
OUT
or V
BAT
.
Note 7: Accuracy of programmed current may degrade for currents greater
than 1A.
Note 8: CLPROG soft-start scales with inverse of CLPROG resistor. If
R
CLPROG
= 2k, then I
SS
= 0.6mA/μs.
