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Linear Technology Electronic Components Datasheet

LTC4054LES5-4.2 Datasheet

150mA Standalone Linear Li-Ion Battery Charger

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LTC4054L-4.2
150mA Standalone Linear
Li-Ion Battery Charger in ThinSOT
Features
Description
n Programmable Charge Current Range:
10mA to 150mA
n No External MOSFET, Sense Resistor or Blocking
Diode Required
n Complete Linear Charger in ThinSOT™ Package for
Single Cell/Coin Cell Lithium-Ion Batteries
n Constant-Current/Constant-Voltage Operation with
Thermal Regulation* to Maximize Charge Rate
without Risk of Overheating
n Charges Single Cell Li-Ion Batteries Directly from
USB Port
n Preset 4.2V Charge Voltage with ±1% Accuracy
n Charge Current Monitor Output for Gas Gauging*
n Automatic Recharge
n Charge Status Output Pin
n C/10 Charge Termination
n 25µA Max Supply Current in Shutdown Mode
n 2.9V Trickle Charge Threshold
n Soft-Start Limits Inrush Current
n Available in a 5-Lead Low Profile (1mm)
SOT-23 Package
Applications
n Charger for Li-Ion Coin Cell Batteries
n Portable MP3 Players, Wireless Headsets
n Bluetooth Applications
n Multifunction Wristwatches
The LTC®4054L is a complete, constant-current/constant-
voltage linear charger for single cell lithium-ion batteries.
Its small size and ability to regulate low charge currents
make the LTC4054L especially well-suited for portable ap-
plications using low capacity rechargeable lithium-ion coin
cells. Furthermore, the LTC4054L 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 eliminate
thermal overdesign. The charge voltage is fixed at 4.2V, and
the charge current can be programmed externally with a
single resistor. The LTC4054L automatically terminates a
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 LTC4054L automatically enters a low current
state, dropping the battery drain current to less than 2µA.
The LTC4054L 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.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property
of their respective owners. *Protected by U.S. Patents including 6,522,118.
Typical Application
90mA Li-Ion Single Coin Cell Charger
VIN
4.5V TO 6.5V
1µF
4
VCC BAT 3
LTC4054L-4.2
5
PROG
GND
2
1.69k
90mA
4.2V
COIN CELL
Li-Ion
BATTERY
4054l42 TA01
Complete Charge Cycle (130mAh Battery)
100
4.4
90
CONSTANT
80
CURRENT
70
4.3
4.2
CONSTANT
VOLTAGE
4.1
60
4.0
50
3.9
40
3.8
30
3.7
20
VCC = 5V
θJA = 130°C/W
3.6
10 RPROG = 1.69k
3.5
TA = 25°C
0
3.4
0 0.25 0.5 0.75 1.0 1.25 1.5 1.75 2.0 2.25
TIME (HOURS)
4054l42 TA01b
4054l42fa
1


Linear Technology Electronic Components Datasheet

LTC4054LES5-4.2 Datasheet

150mA Standalone Linear Li-Ion Battery Charger

No Preview Available !

LTC4054L-4.2
Absolute Maximum Ratings
(Note 1)
Input Supply Voltage (VCC)......................... –0.3V to 10V
PROG................................................–0.3V to VCC + 0.3V
CHRG.......................................................... –0.3V to 10V
BAT............................................................... –0.3V to 7V
BAT Short-Circuit Duration............................ Continuous
BAT Pin Current................................................... 200mA
PROG Pin Current..................................................1.5mA
Maximum Junction Temperature........................... 125°C
Operating Temperature Range (Note 2)....–40°C to 85°C
Storage Temperature Range................... –65°C to 125°C
Lead Temperature (Soldering, 10 sec).................... 300°C
Pin Configuration
TOP VIEW
CHRG 1
GND 2
BAT 3
5 PROG
4 VCC
S5 PACKAGE
5-LEAD PLASTIC TSOT-23
TJMAX = 125°C, θJA = 80°C/W TO 150°C/W
DEPENDING ON PCB BOARD LAYOUT (NOTE 3)
Order Information
LEAD FREE FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
LTC4054LES5-4.2#PBF LTC4054LES5-4.2#TRPBF LTAFA
5-Lead Plastic TSOT-23
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
TEMPERATURE RANGE
–40°C to 85°C
Electrical Characteristics The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC = 5V, unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX UNITS
VCC
Supply Voltage
l 4.25
6.5
V
ICC
Supply Current
Charge Mode (Note 4), RPROG = 1k
l
Standby Mode (Charge Terminated)
l
Shutdown Mode (RPROG Not Connected, l
VCC < VBAT, or VCC < VUV)
1200 2000
µA
200
500
µA
25
50
µA
VFLOAT Regulated Output (Float) Voltage
0°C ≤ TA ≤ 85°C, IBAT = 40mA
4.158
4.2
4.242
V
IBAT
BAT Pin Current
RPROG = 15k, Current Mode
l 9.3
10
10.7
mA
RPROG = 1k, Current Mode
l 142.5
150
157.5
mA
Standby Mode, VBAT = 4.2V
l
0
–2.5
–6
µA
Shutdown Mode (RPROG Not Connected)
±1
±2
µA
Sleep Mode, VCC = 0V
±1
±2
µA
ITRIKL
Trickle Charge Current
VBAT < VTRIKL, RPROG = 1k (IBAT = 150mA) l
5
15
25
mA
VTRIKL
Trickle Charge Threshold Voltage
RPROG = 15k, VBAT Rising
2.8
2.9
3
V
VTRHYS Trickle Charge Hysteresis Voltage
RPROG = 15k
60
80
110
mV
VUV
VCC Undervoltage Lockout Threshold Voltage From VCC Low to High
l 3.7
3.8
3.92
V
VUVHYS VCC Undervoltage Lockout Hysteresis Voltage
l 150
200
300
mV
VMSD
Manual Shutdown Threshold Voltage
PROG Pin Rising
PROG Pin Falling
l 1.15
1.21
1.30
V
l 0.9
1.0
1.1
V
VASD
VCC – VBAT Lockout Threshold Voltage
VCC from Low to High
VCC from High to Low
70
100
140
mV
5
30
50
mV
4054l42fa
2


Part Number LTC4054LES5-4.2
Description 150mA Standalone Linear Li-Ion Battery Charger
Maker Linear
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