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Linear Technology Electronic Components Datasheet

LTC4065EDC-4.4 Datasheet

Standalone 750mA Li-Ion Battery Charge

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LTC4065-4.4
Standalone 750mA Li-Ion
Battery Charger in 2 × 2 DFN
FEATURES
Complete Linear Charger in 2mm × 2mm DFN
Package
C/10 Charge Current Detection Output
Timer Termination
Charge Current Programmable Up to 750mA with
5% Accuracy
No External MOSFET, Sense Resistor or Blocking
www.DaDtiaoSdheeeRt4eUq.cuoirmed
Preset 4.4V Float Voltage with 0.6% Accuracy
Constant-Current/Constant-Voltage Operation with
Thermal Feedback to Maximize Charging Rate
Without Risk of Overheating
Charge Current Monitor Output for Gas Gauging
Automatic Recharge
Charges Single-cell Li-Ion Batteries Directly from
USB Port
20µA Supply Current in Shutdown Mode
Soft-Start Limits Inrush Current
Tiny 6-Lead (2mm × 2mm) DFN Package
U
APPLICATIO S
Wireless PDAs
Cellular Phones
Portable Electronics
, 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.
DESCRIPTIO
The LTC®4065-4.4 is a complete constant-current/con-
stant-voltage linear charger for high capacity single-cell
lithium-ion batteries with a 4.4V float voltage. Its 2mm ×
2mm DFN package and low external component count
make the LTC4065-4.4 especially well-suited for portable
applications. Furthermore, LTC4065-4.4 is specifically
designed to work within USB power specifications.
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 manufac-
turer specifications.
No external sense resistor or blocking diode is required due
to the internal MOSFET architecture. Thermal feedback regu-
lates 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 LTC4065-4.4 automatically enters a low cur-
rent state, dropping battery drain current to less than
1µA. With power applied, LTC4065-4.4 can be put into shut-
down mode, reducing the supply current to less than 20µA.
The full-featured LTC4065-4.4 also includes automatic
recharge, low-battery charge conditioning (trickle charg-
ing) and soft-start (to limit inrush current).
The LTC4065-4.4 is available in a tiny 6-lead, low profile
(0.75mm) 2mm × 2mm DFN package.
TYPICAL APPLICATIO
Standalone Li-Ion Battery Charger
VIN
4.5V TO
5.5V
R1
510
C1
1µF
VCC BAT
LTC4065-4.4
CHRG PROG
EN GND
500mA
+ 4.4V
Li-Ion
R3 BATTERY*
2k
4065 TA01
*E.G. SANYO BATTERIES: UF553436T OR UF553450T
Complete Charge Cycle (1100mAh Battery)
550
500 CONSTANT-CURRENT
450
400
4.5
4.4
CONSTANT-
VOLTAGE
4.3
4.2
350
4.1
300
4.0
250
CHRG
3.9
200
TRANSITION 3.8
150
100
50
0
0
3.7
CHARGE
3.6
VCC = 5V
TERMINATION
3.5
RPROG = 2K
3.4
0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
TIME (HOURS)
4065 TA01b
406544f
1


Linear Technology Electronic Components Datasheet

LTC4065EDC-4.4 Datasheet

Standalone 750mA Li-Ion Battery Charge

No Preview Available !

LTC4065-4.4
ABSOLUTE AXI U RATI GS
(Note 1)
VCC
t < 1ms and Duty Cycle < 1% ................. – 0.3V to 7V
Steady State ........................................... – 0.3V to 6V
BAT, CHRG ................................................. –0.3V to 6V
EN, PROG ....................................... –0.3V to VCC + 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
wwwS.tDoartaagSeheTeet4mUp.ceormature Range ................ – 65°C to 125°C
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
GND 1
CHRG 2
7
BAT 3
6 PROG
5 EN
4 VCC
DC PACKAGE
6-LEAD (2mm × 2mm) PLASTIC DFN
TJMAX = 125°C, θJA = 60°C/W (NOTE 3)
EXPOSED PAD (PIN 7) IS GND, MUST BE SOLDERED TO PCB
ORDER PART NUMBER
LTC4065EDC-4.4
DC PART MARKING
LCKR
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS
The 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
VCC
ICC
ICCMS
ICCUV
VCC Supply Voltage
Quiescent VCC Supply Current
VCC Supply Current in Shutdown
VCC Supply Current in Undervoltage
Lockout
(Note 4)
VBAT = 4.5V (Forces IBAT and IPROG = 0)
VEN = 5V
VCC < VBAT, VCC = 3.5V, VBAT = 4V
3.75
5.5
120 250
20
40
6
11
VFLOAT
IBAT
IBMS
VBAT Regulated Output Voltage
BAT Pin Current
Battery Drain Current in Shutdown
Mode
IBAT = 2mA
IBAT = 2mA, 0°C < TA < 85°C
RPROG = 10k (0.1%), Current Mode
RPROG = 2k (0.1%), Current Mode
VEN = VCC
4.375 4.4 4.425
4.358 4.4 4.442
88
100 112
475
500
525
–1
0
1
IBUV
Battery Drain Current in Undervoltage VCC = 3.5V, VBAT = 4V
Lockout
0
1
4
VUVLO
VPROG
VASD
VMSH
VMSL
REN
VCC Undervoltage Lockout Voltage
PROG Pin Voltage
Automatic Shutdown Threshold
Voltage
Manual Shutdown High Voltage
Manual Shutdown Low Voltage
EN Pin Input Resistance
VCC Rising
VCC Falling
RPROG = 2k, IPROG = 500µA
RPROG = 10k, IPROG = 100µA
(VCC – VBAT), VCC Low to High
(VCC – VBAT), VCC High to Low
VEN Rising
VEN Falling
3.4
3.6
3.8
2.8
3.0
3.2
0.98
1
1.02
0.98
1
1.02
60
80
100
15
30
45
1
0.6
0.95
1.5
3.3
UNITS
V
µA
µA
µA
V
V
mA
mA
µA
µA
V
V
V
V
mV
mV
V
V
M
406544f
2


Part Number LTC4065EDC-4.4
Description Standalone 750mA Li-Ion Battery Charge
Maker Linear
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LTC4065EDC-4.4 Datasheet PDF






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