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LTC4068X-4.2 Datasheet(PDF) 3 Page - Linear Technology

Part # LTC4068X-4.2
Description  Standalone Linear Li-Ion Battery Charger with Programmable Termination
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC4068X-4.2 Datasheet(HTML) 3 Page - Linear Technology

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LTC4068-4.2/LTC4068X-4.2
406842fa
Note 1: Absolute Maximum Ratings are those values beyond which the life
of the device may be impaired.
Note 2: The LTC4068E-4.2/LTC4068XE-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.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
TLIM
Junction Temperature in Constant
120
°C
Temperature Mode
RON
Power FET “ON” Resistance
600
mΩ
(Between VCC and BAT)
tSS
Soft-Start Time
IBAT = 0 to IBAT =1000V/RPROG
100
µs
tRECHARGE
Recharge Comparator Filter Time
VBAT High to Low
0.75
2
4.5
ms
tTERM
Termination Comparator Filter Time
IBAT Drops Below Charge Termination Threshold
400
1000
2500
µs
The
denotes specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC = 5V, unless otherwise noted.
ELECTRICAL CHARACTERISTICS
Note 3: Failure to solder the exposed backside of the package to the PC
board will result in a thermal resistance much higher than 40°C/W.
Note 4: Supply current includes PROG pin current and ITERM pin current
(approximately 100µA each) but does not include any current delivered to
the battery through the BAT pin (approximately 100mA).
Note 5: This parameter is not applicable to the LTC4068X.
TYPICAL PERFOR A CE CHARACTERISTICS
PROG Pin Voltage vs Supply
Voltage (Constant Current Mode)
VCC (V)
4
0.985
0.990
0.995
1.000
1.005
1.015
4.5
5
5.5
6
405842 G01
6.5
7
1.010
VCC = 5V
VBAT = 4V
TA = 25°C
RPROG = 10k
TEMPERATURE (°C)
–50
0.9975
1.0000
1.0025
25
75
405842 G02
0.9950
0.9925
0.9900
–25
0
50
1.0050
1.0075
1.0100
100
VCC = 5V
VBAT = 4V
RPROG = 10k
VPROG (V)
0
0
100
200
300
400
600
0.2
0.4
0.6
0.8
405842 G03
1
1.2
500
VCC = 5V
TA = 25°C
RPROG = 2k
RTERM = 2k
PROG Pin Voltage
vs Temperature
Charge Current
vs PROG Pin Voltage


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