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LTC3440 Datasheet(PDF) 4 Page - Linear Integrated Systems

Part # LTC3440
Description  Standalone 250mA Li-Ion Battery Charger in 2 횞 2 DFN
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Manufacturer  LINEAR [Linear Integrated Systems]
Direct Link  http://www.linearsystems.com
Logo LINEAR - Linear Integrated Systems

LTC3440 Datasheet(HTML) 4 Page - Linear Integrated Systems

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LTC4065L/
LTC4065LX/LTC4065L-4.1
4
4065lfb
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 LTC4065L is tested under pulsed load conditions such that
TJ ≈ TA. The LTC4065L is guaranteed to meet performance specifica-
tions 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: Failure to solder the exposed backside of the package to the PC
board ground plane will result in a thermal resistance much higher than
rated.
ELECTRICAL CHARACTERISTICS The l denotes specifications which apply over the full operating
temperature range, otherwise specifications are TA = 25°C. VCC = 5V, VBAT = 3.8V, VEN = 0V unless otherwise specified. (Note 2)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
ICHRG
CHRG Pin Input Current
VBAT = 4.5V, VCHRG = 5V
l
01
μA
IC/10
End of Charge Indication Current Level
RPROG = 1.33k (Note 5)
l
0.08
0.095
0.11
mA/mA
TLIM
Junction Temperature in Constant
Temperature Mode
115
°C
RON
Power FET “ON” Resistance
(Between VCC and BAT)
IBAT = 150mA
1.5
Ω
fBADBAT
Defective Battery Detection CHRG
Pulse Frequency
2Hz
DBADBAT
Defective Battery Detection CHRG
Pulse Frequency Duty Ratio
75
%
Note 4: Although the LTC4065L functions properly at 3.75V input, full
charge current requires an input voltage greater than the desired final bat-
tery voltage per the ΔVUVCL1 specification.
Note 5: IC/10 is expressed as a fraction of measured full charge current
with indicated PROG resistor.
Note 6: This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed 125°C when overtemperature protection is active.
Continuous operation above the specified maximum operating junction
temperature may impair device reliability.
Note 7: This parameter is not applicable to the LTC4065LX.


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