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LTC4065AEDC Datasheet

Standalone 750mA Li-Ion Battery Charger

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LTC4065/LTC4065A
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
Diode Required
Preset 4.2V Float Voltage with 0.6% Accuracy
Constant-Current/Constant-Voltage Operation with
Thermal Feedback to Maximize Charging Rate
Without Risk of Overheating
ACPR Pin Indicates Presence of Input Supply
(LTC4065A Only)
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.
DESCRIPTIO
The LTC®4065 is a complete constant-current/constant-
voltage linear charger for single-cell lithium-ion batteries.
Its 2mm × 2mm DFN package and low external component
count make the LTC4065 especially well-suited for por-
table applications. Furthermore, LTC4065 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 feed-
back 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 LTC4065 automatically enters a low current
state, dropping battery drain current to less than 1µA. With
power applied, LTC4065 can be put into shutdown mode,
reducing the supply current to less than 20µA.
The full-featured LTC4065 also includes automatic re-
charge, low-battery charge conditioning (trickle charg-
ing), soft-start (to limit inrush current) and an open-drain
status pin to indicate the presence of an adequate input
voltage (LTC4065A only).
The LTC4065 is available in a tiny 6-lead, low profile
(0.75mm) 2mm × 2mm DFN package.
TYPICAL APPLICATIO
Standalone Li-Ion Battery Charger
VIN
4.3V TO 5.5V
C1
1µF
R2*
1
R1
510
VCC BAT
LTC4065
CHRG PROG
EN GND
500mA
+ 4.2V
Li-Ion
R3 BATTERY
2k
4065 TA01
*SERIES 1RESISTOR ONLY NEEDED FOR INDUCTIVE INPUT SUPPLIES
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1


Linear Technology Electronic Components Datasheet

LTC4065AEDC Datasheet

Standalone 750mA Li-Ion Battery Charger

No Preview Available !

LTC4065/LTC4065A
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 (LTC4065), ACPR (LTC4065A) .. –0.3V to VCC + 0.3V
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
Storage Temperature 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/ACPR*
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
*EN PIN 5 ON LTC4065EDC, ACPR PIN 5 ON LTC4065AEDC
ORDER PART NUMBER DC PART MARKING
LTC4065EDC
LTC4065AEDC
LBPG
LBVJ
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 (LTC4065 only) unless otherwise specified. (Note 2)
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX
VCC
ICC
ICCMS
ICCUV
VCC Supply Voltage
(Note 4)
3.75
5.5
Quiescent VCC Supply Current
VBAT = 4.5V (Forces IBAT and IPROG = 0)
120 250
VCC Supply Current in Shutdown
VEN = 5V (LTC4065) or Float PROG (LTC4065A)
20
40
VCC Supply Current in Undervoltage VCC < VBAT, VCC = 3.5V, VBAT = 4V
Lockout
6
11
VFLOAT
IBAT
IBMS
IBUV
VBAT Regulated Output Voltage
IBAT = 2mA
IBAT = 2mA, 0°C < TA < 85°C
BAT Pin Current
RPROG = 10k (0.1%), Current Mode
RPROG = 2k (0.1%), Current Mode
Battery Drain Current in Shutdown
Mode
VEN = VCC (LTC4065),
VPROG > VMS,PROG (LTC4065A)
Battery Drain Current in Undervoltage VCC = 3.5V, VBAT = 4V
Lockout
4.175 4.2 4.225
4.158 4.2 4.242
88
100 112
475
500
525
–1
0
1
0
1
4
VUVLO
VPROG
VASD
VMSH
VCC Undervoltage Lockout Voltage
PROG Pin Voltage
Automatic Shutdown Threshold
Voltage
Manual Shutdown High Voltage
(LTC4065)
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
3.4
3.6
3.8
2.8
3.0
3.2
0.98
1
1.02
0.98
1
1.02
60
82
100
15
32
45
1
VMSL
Manual Shutdown Low Voltage
VEN Falling
0.6
(LTC4065)
REN
EN Pin Input Resistance
0.95
1.5
3.3
2
UNITS
V
µA
µA
µA
V
V
mA
mA
µA
µA
V
V
V
V
mV
mV
V
V
M
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Part Number LTC4065AEDC
Description Standalone 750mA Li-Ion Battery Charger
Maker Linear
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