Datasheet

LTC4085-3/LTC4085-4
4
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The ● indicates specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C (Note 5). V
IN
= 5V, V
BAT
= 3.7V, HPWR = 5V, WALL = 0V, R
PROG
= 100k,
R
CLPROG
= 2k, unless otherwise noted.
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: V
CC
is the greater of V
IN
, V
OUT
or V
BAT
.
Note 3: All voltage values are with respect to GND.
Note 4: This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperatures will exceed 110°C when overtemperature protection is
active. Continuous operation above the specifi ed maximum operating
junction temperature may result in device degradation or failure.
Note 5: The LTC4085-3/LTC4085-4 is tested under pulsed load conditions
such that T
J
≈ T
A
. The LTC4085E-3/LTC4085E-4 is guaranteed to meet
specifi ed performance from 0° to 85°C. Specifi cations over the –40°C to
85°C operating temperature range are assured by design, characterization
and correlation with statistical process controls.
Note 6: Guaranteed by long term current density limitations.
Note 7: Total input current is equal to this specifi cation plus 1.002 • I
BAT
where I
BAT
is the charge current.
Note 8: Accuracy of programmed current may degrade for currents greater
than 1.5A.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
External Ideal Diode
V
FWD,EDA
External Ideal Diode Forward Voltage V
GATE
= 1.85V; I
GATE
= 0 20 mV
Logic
V
OL
Output Low Voltage CHRG, ACPR I
SINK
= 5mA
●
0.1 0.4 V
V
IH
Input High Voltage SUSP, HPWR Pin
●
1.2 V
V
IL
Input Low Voltage SUSP, HPWR Pin
●
0.4 V
I
PULLDN
Logic Input Pull-Down Current SUSP, HPWR 2 µA
V
CHG(SD)
Charger Shutdown Threshold Voltage
on TIMER
●
0.14 0.4 V
I
CHG(SD)
Charger Shutdown Pull-Up Current
on TIMER
V
TIMER
= 0V
●
514 µA
V
WAR
Absolute Wall Input Threshold Voltage V
WALL
Rising Threshold
●
4.15 4.25 4.35 V
V
WAF
Absolute Wall Input Threshold Voltage V
WALL
Falling Threshold 3.12 V
V
WDR
Delta Wall Input Threshold Voltage V
WALL
– V
BAT
Rising Threshold 75 mV
V
WDF
Delta Wall Input Threshold Voltage V
WALL
– V
BAT
Falling Threshold
●
02560 mV
I
WALL
Wall Input Current V
WALL
= 5V 75 150 µA
NTC
V
VNTC
V
NTC
Bias Voltage I
VNTC
= 500µA
●
4.4 4.85 V
I
NTC
NTC Input Leakage Current V
NTC
= 1V 0 ±1 µA
V
COLD
Cold Temperature Fault Threshold
Voltage
Rising Threshold
Hysteresis
0.738 • V
VNTC
0.018 • V
VNTC
V
V
V
HOT
Hot Temperature Fault Threshold
Voltage
Falling Threshold
Hysteresis
0.326 • V
VNTC
0.015 • V
VNTC
V
V
V
DIS
NTC Disable Voltage NTC Input Voltage to GND (Falling)
Hysteresis
●
75 100
35
125 mV
mV