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LTC4069-4.4 Datasheet(PDF) 3 Page - Linear Technology

Part # LTC4069-4.4
Description  Standalone 750mA Li-Ion Battery Charger
Download  16 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC4069-4.4 Datasheet(HTML) 3 Page - Linear Technology

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LTC4069-4.4
3
406944fa
The
l denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25°C.
VCC = 5V, VBAT = 3.8V, VNTC = 0V unless otherwise specified. (Note 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: The LTC4069-4.4 is guaranteed to meet performance
specifications from 0°C to 85°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.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
IPROG
PROG Pin Pull-Up Current
VPROG > 1V
3
μA
VMS, PROG
PROG Shutdown Threshold Voltage
VPROG Rising
l
3.7
4
4.3
V
tSS
Soft-Start Time
170
μs
ITRKL
Trickle Charge Current
VBAT = 2V, RPROG = 2k (0.1%)
35
50
65
mA
VTRKL
Trickle Charge Threshold Voltage
VBAT Rising
l
2.7
2.9
3.05
V
VTRHYS
Trickle Charge Hysteresis Voltage
90
mV
ΔVRECHRG
Recharge Battery Threshold Voltage
VFLOAT – VRECHRG, 0°C < TA < 85°C
70
100
130
mV
ΔVUVCL1
ΔVUVCL2
(VCC – VBAT) Undervoltage Current
Limit
IBAT = 90% Programmed Charge Current
IBAT = 10% Programmed Charge Current
180
90
220
125
330
150
mV
mV
tTIMER
Termination Timer
l
3
4.5
6
Hrs
Recharge Timer
l
1.5
2.25
3
Hrs
Low-Battery Trickle Charge Time
VBAT = 2.5V
l
0.75
1.125
1.5
Hrs
VCHRG
CHRG Pin Output Low Voltage
ICHRG = 5mA
l
60
105
mV
ICHRG
CHRG Pin Leakage Current
VBAT = 4.5V, VCHRG = 5V
l
01
μA
IC/10
End of Charge Indication Current Level
RPROG = 2k (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 = 350mA
450
fBADBAT
Defective Battery Detection CHRG
Pulse Frequency
2Hz
DBADBAT
Defective Battery Detection CHRG
Pulse Frequency Duty Ratio
75
%
INTC
NTC Pin Current
VNTC = 2.5V
1
μA
VCOLD
Cold Temperature Fault Threshold
Voltage
Rising Voltage Threshold
Hysteresis
0.76 • VCC
0.015 • VCC
V
V
VHOT
Hot Temperature Fault Threshold
Voltage
Falling Voltage Threshold
Hysteresis
0.35 • VCC
0.017 • VCC
V
V
VNTC-DIS
NTC Disable Threshold Voltage
Falling Threshold; VCC = 5V
82
mV
VDIS-HYS
NTC Disable Hysteresis Voltage
50
mV
fNTC
Fault Temperature CHRG Pulse Frequency
2
Hz
DNTC
Fault Temperature CHRG Pulse Frequency
Duty Ratio
25
%
Note 4: Although the LTC4069-4.4 functions properly at 3.75V, full charge
current requires an input voltage greater than the desired final battery
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.


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