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LTC4069EDC-4.4#TRMPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
LTC4069-4.4
1
406944fa
TYPICAL APPLICATION
DESCRIPTION
Standalone 750mA Li-Ion
Battery Charger in 2 × 2 DFN
with NTC Thermistor Input
The LTC
®
4069-4.4 is a complete constant-current/
constant-voltage linear charger for high capacity single-cell
lithium-ion batteries with a 4.4V fl oat voltage. The 2mm
× 2mm DFN package and low external component count
make the LTC4069-4.4 especially well-suited for portable
applications. Furthermore, LTC4069-4.4 is specifi cally
designed to work within USB power specifi cations.
The CHRG pin indicates when charge current has dropped
to ten percent of its programmed value (C/10). An
internal timer terminates charging according to battery
manufacturer specifi cations.
No external sense resistor or blocking diode is required due to
the internal MOSFET architecture. Thermal feedback regulates
charge current to limit the die temperature during high power
operation or high ambient temperature conditions.
When the input supply (wall adapter or USB supply) is
removed, the LTC4069-4.4 automatically enters a low current
state, dropping battery drain current to less than 1μA. With
power applied, LTC4069-4.4 can be put into shutdown mode,
reducing the supply current to less than 20μA.
The LTC4069-4.4 also includes automatic recharge, low-
battery charge conditioning (trickle charging), soft-start
(to limit inrush current) and an NTC thermistor input used
to monitor battery temperature.
The LTC4069-4.4 is available in a tiny 6-lead, low profi le
(0.75mm) 2mm × 2mm DFN package.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Protected by U.S. Patents, including 6522118, 6700364.
FEATURES
APPLICATIONS
n
Complete Linear Charger in 2mm × 2mm DFN
Package
n
C/10 Charge Current Detection Output
n
Timer Charge Termination
n
Charge Current Programmable Up to 750mA with
5% Accuracy
n
No External MOSFET, Sense Resistor or Blocking
Diode Required
n
NTC Thermistor Input for Temperature Qualifi ed
Charging
n
Preset 4.4V Float Voltage with 0.6% Accuracy
n
Constant-Current/Constant-Voltage Operation with
Thermal Feedback to Maximize Charge Rate
Without Risk of Overheating
n
Charge Current Monitor Output for Gas Gauging
n
Automatic Recharge
n
Charges Single-Cell Li-Ion Batteries Directly from
USB Port
n
20μA Supply Current in Shutdown Mode
n
Soft-Start Limits Inrush Current
n
Tiny 6-Lead (2mm × 2mm) DFN Package
n
Wireless PDAs
n
Cellular Phones
n
Portable Electronics
Standalone Li-Ion Battery Charger
+
V
CC
R1
510Ω
500mA
R
PROG
2k
4069 TA01
4.4V
Li-Ion
BATTERY*
V
IN
4.5V TO 5.5V
1μF
LTC4069-4.4
CHRG
NTC
BAT
PROG
GND
R
NOM
100k
R
NTC
100k
*E.G. SANYO BATTERIES: UF553436T OR UF553450T
TIME (HOURS)
0
CHARGE CURRENT (mA)
150
450
500
550
1
2
3
4069 TA01b
50
350
250
100
400
0
300
200
BATTERY VOLTAGE (V)
3.7
4.3
4.4
4.5
3.5
4.1
3.9
3.6
4.2
3.4
4.0
3.8
0.5
1.5
4
5
2.5
3.5
4.5
CONSTANT-CURRENT
CONSTANT-
VOLTAGE
V
CC
= 5V
R
PROG
= 2K
CHRG
TRANSITION
CHARGE
TERMINATION
Complete Charge Cycle (1100mAh Battery)
LTC4069-4.4
2
406944fa
PIN CONFIGURATION ABSOLUTE MAXIMUM RATINGS
V
CC
t < 1ms and Duty Cycle < 1% ................. –0.3V to 7V
Steady State ............................................ –0.3V to 6V
BAT, CHRG .................................................. –0.3V to 6V
PROG, NTC ..................................... –0.3V to V
CC
+ 0.3V
BAT Short-Circuit Duration ............................Continuous
BAT Pin Current .................................................. 800mA
PROG Pin Current ................................................ 800μA
Junction Temperature (Note 6) ............................ 125°C
Operating Temperature Range (Note 2)....– 40°C to 85°C
Storage Temperature Range .................. –65°C to 125°C
(Note 1)
ORDER INFORMATION
TOP VIEW
7
DC PACKAGE
6-LEAD (2mm s 2mm) PLASTIC DFN
4
5
6
3
2
1GND
CHRG
BAT
PROG
NTC
V
CC
T
JMAX
= 125°C, θ
JA
= 60°C/W (NOTE 3)
EXPOSED PAD (PIN 7) IS GND
MUST BE SOLDERED TO PCB
LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC4069EDC-4.4#PBF LTC4069EDC-4.4#TRPBF LCKQ 6-Lead (2mm X 2mm) Plastic DFN –40°C to 85°C
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges.
Consult LTC Marketing for information on non-standard lead based fi nish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifi
cations, go to: http://www.linear.com/tapeandreel/
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
CC
V
CC
Supply Voltage (Note 4)
l
3.75 5.5 V
I
CC
Quiescent V
CC
Supply Current V
BAT
= 4.5V (Forces I
BAT
and I
PROG
= 0)
l
120 250 μA
I
CCMS
V
CC
Supply Current in Shutdown Float PROG
l
20 40 μA
I
CCUV
V
CC
Supply Current in Undervoltage Lockout V
CC
< V
BAT
, V
CC
= 3.5V, V
BAT
= 4V
l
611μA
V
FLOAT
V
BAT
Regulated Output Voltage I
BAT
= 2mA
I
BAT
= 2mA, 0°C < T
A
< 85°C
4.375
4.358
4.4
4.4
4.425
4.442
V
V
I
BAT
BAT Pin Current R
PROG
= 10k (0.1%), Current Mode
R
PROG
= 2k (0.1%), Current Mode
l
l
88
475
100
500
112
525
mA
mA
I
BMS
Battery Drain Current in Shutdown Mode Floating PROG, V
CC
> V
BAT
l
–1 0 1 μA
I
BUV
Battery Drain Current in Undervoltage
Lockout
V
CC
= 3.5V, V
BAT
= 4V
l
014μA
V
UVLO
V
CC
Undervoltage Lockout Voltage V
CC
Rising
V
CC
Falling
l
l
3.4
2.8
3.6
3
3.8
3.2
V
V
V
PROG
PROG Pin Voltage R
PROG
= 2k, I
PROG
= 500μA
R
PROG
= 10k, I
PROG
= 100μA
l
l
0.98
0.98
1
1
1.02
1.02
V
V
V
ASD
Automatic Shutdown Threshold Voltage (V
CC
– V
BAT
), V
CC
Low to High
(V
CC
– V
BAT
), V
CC
High to Low
60
15
80
30
100
45
mV
mV
The l denotes specifi cations which apply over the full operating temperature range, otherwise specifi cations are T
A
= 25°C.
V
CC
= 5V, V
BAT
= 3.8V, V
NTC
= 0V unless otherwise specifi ed. (Note 2)
ELECTRICAL CHARACTERISTICS
LTC4069-4.4
3
406944fa
The l denotes specifi cations which apply over the full operating temperature range, otherwise specifi cations are T
A
= 25°C.
V
CC
= 5V, V
BAT
= 3.8V, V
NTC
= 0V unless otherwise specifi ed. (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
specifi cations from 0°C 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 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
I
PROG
PROG Pin Pull-Up Current V
PROG
> 1V 3 μA
V
MS, PROG
PROG Shutdown Threshold Voltage V
PROG
Rising
l
3.7 4 4.3 V
t
SS
Soft-Start Time 170 μs
I
TRKL
Trickle Charge Current V
BAT
= 2V, R
PROG
= 2k (0.1%) 35 50 65 mA
V
TRKL
Trickle Charge Threshold Voltage V
BAT
Rising
l
2.7 2.9 3.05 V
V
TRHYS
Trickle Charge Hysteresis Voltage 90 mV
ΔV
RECHRG
Recharge Battery Threshold Voltage V
FLOAT
– V
RECHRG
, 0°C < T
A
< 85°C 70 100 130 mV
ΔV
UVCL1
ΔV
UVCL2
(V
CC
– V
BAT
) Undervoltage Current
Limit
I
BAT
= 90% Programmed Charge Current
I
BAT
= 10% Programmed Charge Current
180
90
220
125
330
150
mV
mV
t
TIMER
Termination Timer
l
3 4.5 6 Hrs
Recharge Timer
l
1.5 2.25 3 Hrs
Low-Battery Trickle Charge Time V
BAT
= 2.5V
l
0.75 1.125 1.5 Hrs
V
CHRG
CHRG Pin Output Low Voltage I
CHRG
= 5mA
l
60 105 mV
I
CHRG
CHRG Pin Leakage Current V
BAT
= 4.5V, V
CHRG
= 5V
l
01μA
I
C/10
End of Charge Indication Current Level R
PROG
= 2k (Note 5)
l
0.08 0.095 0.11 mA/mA
T
LIM
Junction Temperature in Constant
Temperature Mode
115 °C
R
ON
Power FET On-Resistance
(Between V
CC
and BAT)
I
BAT
= 350mA 450 mΩ
f
BADBAT
Defective Battery Detection CHRG
Pulse Frequency
2Hz
D
BADBAT
Defective Battery Detection CHRG
Pulse Frequency Duty Ratio
75 %
I
NTC
NTC Pin Current V
NTC
= 2.5V 1 μA
V
COLD
Cold Temperature Fault Threshold
Voltage
Rising Voltage Threshold
Hysteresis
0.76 • V
CC
0.015 • V
CC
V
V
V
HOT
Hot Temperature Fault Threshold
Voltage
Falling Voltage Threshold
Hysteresis
0.35 • V
CC
0.017 • V
CC
V
V
V
NTC-DIS
NTC Disable Threshold Voltage Falling Threshold; V
CC
= 5V 82 mV
V
DIS-HYS
NTC Disable Hysteresis Voltage 50 mV
f
NTC
Fault Temperature CHRG Pulse Frequency 2 Hz
D
NTC
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 fi nal battery
voltage per the ΔV
UVCL1
specifi cation.
Note 5: I
C/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 specifi ed maximum operating junction
temperature may impair device reliability.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

LTC4069EDC-4.4#TRMPBF

Mfr. #:
Buy LTC4069EDC-4.4#TRMPBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Battery Management Standalone Li-Ion Battery Charger w/ Thermistor Input, New 4.4V Batteries
Lifecycle:
New from this manufacturer.
Delivery:
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