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LTC4058 Datasheet(PDF) 3 Page - Linear Technology

Part # LTC4058
Description  Standalone Linear Li-Ion Battery Charger with Thermal Regulation in DFN
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC4058 Datasheet(HTML) 3 Page - Linear Technology

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LTC4058-4.2/LTC4058X-4.2
sn405842 405842fs
Note 1: Absolute Maximum Ratings are those values beyond which the life
of the device may be impaired.
Note 2: The LTC4058E-4.2/LTC4058XE-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.
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.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
TLIM
Junction Temperature in Constant
120
°C
Temperature Mode
RON
Power FET “ON” Resistance
600
m
(Between VCC and BAT)
tSS
Soft-Start Time
IBAT = 0 to IBAT =1000V/RPROG
100
µs
tRECHARGE
Recharge Comparator Filter Time
VBSENSE High to Low
0.75
2
4.5
ms
tTERM
Termination Comparator Filter Time
IBAT Drops Below ICHG/10
400
1000
2500
µs
The q 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 4: Supply current includes PROG pin current (approximately 100
µA)
but does not include any current delivered to the battery through the BAT
pin (approximately 100mA).
Note 5: For all Li-Ion applications, the BSENSE pin must be electrically
connected to the BAT pin.
Note 6: This parameter is not applicable to the LTC4058X.
Note 7: ITERM is expressed as a fraction of measured full charge current
with indicated PROG resistor.
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 = VBSENSE = 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 = VBSENSE = 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
PROG Pin Voltage
vs Temperature
Charge Current
vs PROG Pin Voltage


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