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Linear Technology Electronic Components Datasheet

LTC4054XES5-4.2 Datasheet

Standalone Linear Li-Ion Battery Charger

No Preview Available !

LTC4054-4.2/LwTwCw.D4a0taS5he4etX4U.-c4om.2
Standalone Linear
Li-Ion Battery Charger with
Thermal Regulation in ThinSOT
FEATURES
s Programmable Charge Current Up to 800mA
s No MOSFET, Sense Resistor or Blocking
Diode Required
s Complete Linear Charger in ThinSOTTM Package for
Single Cell Lithium-Ion Batteries
s Constant-Current/Constant-Voltage Operation with
Thermal Regulation* to Maximize Charge Rate
Without Risk of Overheating
s Charges Single Cell Li-Ion Batteries Directly
from USB Port
s Preset 4.2V Charge Voltage with ±1% Accuracy
s Charge Current Monitor Output for Gas
Gauging*
s Automatic Recharge
s Charge Status Output Pin
s C/10 Charge Termination
s 25µA Supply Current in Shutdown
s 2.9V Trickle Charge Threshold (LTC4054)
s Available Without Trickle Charge (LTC4054X)
s Soft-Start Limits Inrush Current
s Available in 5-Lead SOT-23 Package
U
APPLICATIO S
s Cellular Telephones, PDAs, MP3 Players
s Charging Docks and Cradles
s Bluetooth Applications
DESCRIPTIO
The LTC®4054 is a complete constant-current/constant-
voltage linear charger for single cell lithium-ion batteries.
Its ThinSOT package and low external component count
make the LTC4054 ideally suited for portable applications.
Furthermore, the LTC4054 is specifically designed to work
within USB power specifications.
No external sense resistor is needed, and no blocking
diode is required due to the internal MOSFET architecture.
Thermal feedback regulates the charge current to limit the
die temperature during high power operation or high
ambient temperature. The charge voltage is fixed at 4.2V,
and the charge current can be programmed externally with
a single resistor. The LTC4054 automatically terminates
the charge cycle when the charge current drops to 1/10th
the programmed value after the final float voltage is
reached.
When the input supply (wall adapter or USB supply) is
removed, the LTC4054 automatically enters a low current
state, dropping the battery drain current to less than 2µA.
The LTC4054 can be put into shutdown mode, reducing
the supply current to 25µA.
Other features include charge current monitor, undervoltage
lockout, automatic recharge and a status pin to indicate
charge termination and the presence of an input voltage.
, LTC and LT are registered trademarks of Linear Technology Corporation.
ThinSOT is a trademark of Linear Technology Corporation.
*U.S.Patent No. 6,522,118
TYPICAL APPLICATIO
600mA Single Cell Li-Ion Charger
VIN
4.5V TO 6.5V
1µF
4
VCC BAT 3
LTC4054-4.2
5
PROG
600mA
4.2V
GND
Li-Ion
1.65k BATTERY
2
405442 TA01a
Complete Charge Cycle (750mAh Battery)
700
CONSTANT
600
CURRENT
CONSTANT
500 POWER
4.75
4.50
CONSTANT
VOLTAGE 4.25
400
4.00
300
3.75
200
3.50
VCC = 5V
100
θJA = 130°C/W
RPROG = 1.65k
0 TA = 25°C
CHARGE
TERMINATED
3.25
3.00
0 0.25 0.5 0.75 1.0 1.25 1.5 1.75 2.0
TIME (HOURS)
405442 TAO1b
405442xf
1


Linear Technology Electronic Components Datasheet

LTC4054XES5-4.2 Datasheet

Standalone Linear Li-Ion Battery Charger

No Preview Available !

LTC4054-4.2/LTC4054X-4.2
ABSOLUTE AXI U RATI GS
(Note 1)
Input Supply Voltage (VCC) ....................... –0.3V to 10V
PROG ............................................. – 0.3V to VCC + 0.3V
BAT .............................................................. –0.3V to 7V
CHRG ........................................................ –0.3V to 10V
BAT Short-Circuit Duration .......................... Continuous
BAT Pin Current ................................................. 800mA
PROG Pin Current ................................................ 800µA
Maximum Junction Temperature .......................... 125°C
Operating Ambient Temperature Range
(Note 2) .............................................. – 40°C to 85°C
Storage Temperature Range ................. – 65°C to 125°C
Lead Temperature (Soldering, 10 sec).................. 300°C
www.DataSheet4U.com
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
CHRG 1
GND 2
BAT 3
5 PROG
4 VCC
S5 PACKAGE
5-LEAD PLASTIC TSOT-23
TJMAX = 125°C, JA = 80°C/ W TO
150°C/W DEPENDING ON PC BOARD LAYOUT)
(N0TE 3)
ORDER PART
NUMBER
LTC4054ES5-4.2
LTC4054XES5-4.2
S5 PART MARKING
LTH7
LTADY
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The q denotes specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC = 5V, unless otherwise noted.
SYMBOL
VCC
ICC
VFLOAT
IBAT
ITRIKL
VTRIKL
VTRHYS
VUV
VUVHYS
VMSD
VASD
ITERM
VPROG
ICHRG
VCHRG
VRECHRG
PARAMETER
Input Supply Voltage
Input Supply Current
Regulated Output (Float) Voltage
BAT Pin Current
Trickle Charge Current
Trickle Charge Threshold Voltage
Trickle Charge Hysteresis Voltage
VCC Undervoltage Lockout Threshold
VCC Undervoltage Lockout Hysteresis
Manual Shutdown Threshold Voltage
VCC – VBAT Lockout Threshold Voltage
C/10 Termination Current Threshold
PROG Pin Voltage
CHRG Pin Weak Pull-Down Current
CHRG Pin Output Low Voltage
Recharge Battery Threshold Voltage
CONDITIONS
Charge Mode (Note 4), RPROG = 10k
Standby Mode (Charge Terminated)
Shutdown Mode (RPROG Not Connected,
VCC < VBAT, or VCC < VUV)
0°C TA 85°C, IBAT = 40mA
RPROG = 10k, Current Mode
RPROG = 2k, Current Mode
Standby Mode, VBAT = 4.2V
Shutdown Mode (RPROG Not Connected)
Sleep Mode, VCC = 0V
VBAT < VTRIKL, RPROG = 2k (Note 5)
RPROG = 10k, VBAT Rising (Note 5)
RPROG = 10k (Note 5)
From VCC Low to High
PROG Pin Rising
PROG Pin Falling
VCC from Low to High
VCC from High to Low
RPROG = 10k (Note 6)
RPROG = 2k
RPROG = 10k, Current Mode
VCHRG = 5V
ICHRG = 5mA
VFLOAT - VRECHRG
MIN TYP MAX
q 4.25
6.5
q
300 2000
q
200 500
q
25
50
4.158 4.2 4.242
q
93
100 107
q
465
500
535
q
0
–2.5
–6
±1
±2
±1
±2
q
20
45
70
2.8
2.9
3.0
60
80
110
q
3.7
3.8
3.92
q
150
200
300
q 1.15 1.21 1.30
q
0.9
1.0
1.1
70
100 140
5
30
50
q 0.085 0.10 0.115
q 0.085 0.10 0.115
q
0.93
1.0
1.07
8
20
35
0.35
0.6
100 150 200
UNITS
V
µA
µA
µA
V
mA
mA
µA
µA
µA
mA
V
mV
V
mV
V
V
mV
mV
mA/mA
mA/mA
V
µA
V
mV
405442xf
2


Part Number LTC4054XES5-4.2
Description Standalone Linear Li-Ion Battery Charger
Maker Linear
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