BATTERY VOLTAGE (V) LTC4054L-4.2 150mA Standalone Linear Li-Ion Battery Charger in ThinSOT Fea T Descrip T n Programmable Charge Current Range: The LTC 4054L is a complete, constant-current/constant- 10mA to 150mA voltage linear charger for single cell lithium-ion batteries. n No External MOSFET, Sense Resistor or Blocking Its small size and ability to regulate low charge currents Diode Required make the LTC4054L especially well-suited for portable ap- n Complete Linear Charger in ThinSOT Package for plications using low capacity rechargeable lithium-ion coin Single Cell/Coin Cell Lithium-Ion Batteries cells. Furthermore, the LTC4054L is specifically designed n Constant-Current/Constant-Voltage Operation with to work within USB power specifications. Thermal Regulation* to Maximize Charge Rate No external sense resistor is needed, and no blocking without Risk of Overheating diode is required due to the internal MOSFET architecture. n Charges Single Cell Li-Ion Batteries Directly from Thermal feedback regulates the charge current to eliminate USB Port thermal overdesign. The charge voltage is fixed at 4.2V, and n Preset 4.2V Charge Voltage with 1% Accuracy the charge current can be programmed externally with a n Charge Current Monitor Output for Gas Gauging* single resistor. The LTC4054L automatically terminates a n Automatic Recharge charge cycle when the charge current drops to 1/10th the n Charge Status Output Pin programmed value after the final float voltage is reached. n C/10 Charge Termination n When the input supply (wall adapter or USB supply) is 25A Max Supply Current in Shutdown Mode n removed, the LTC4054L automatically enters a low current 2.9V Trickle Charge Threshold n state, dropping the battery drain current to less than 2A. Soft-Start Limits Inrush Current n The LTC4054L can be put into shutdown mode, reducing Available in a 5-Lead Low Profile (1mm) the supply current to 25A. SOT-23 Package Other features include charge current monitor, undervoltage a T lockout, automatic recharge and a status pin to indicate n charge termination and the presence of an input voltage. Charger for Li-Ion Coin Cell Batteries n L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and Portable MP3 Players, Wireless Headsets ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property n Bluetooth Applications of their respective owners. *Protected by U.S. Patents including 6,522,118. n Multifunction Wristwatches Typical a T Complete Charge Cycle (130mAh Battery) 100 4.4 90mA Li-Ion Single Coin Cell Charger 90 4.3 CONSTANT V 80 4.2 IN CURRENT CONSTANT 4.5V TO 6.5V 70 VOLTAGE 4.1 60 4.0 1F 4 50 3.9 V 3 CC BAT 40 3.8 90mA LTC4054L-4.2 5 4.2V 30 3.7 PROG COIN CELL V = 5V CC 20 3.6 GND Li-Ion = 130C/W JA 1.69k BATTERY R = 1.69k PROG 10 3.5 2 T = 25C A 4054l42 TA01 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 CHARGE CURRENT (mA) ion pplica ions pplica ion uresLTC4054L-4.2 a Te Maxi Mu M r a T p in c F T (Note 1) TOP VIEW Input Supply Voltage (V ) ........................ 0.3V to 10V CC CHRG 1 5 PROG PROG ...............................................0.3V to V + 0.3V CC GND 2 CHRG ......................................................... 0.3V to 10V BAT 3 4 V CC BAT .............................................................. 0.3V to 7V S5 PACKAGE BAT Short-Circuit Duration ...........................Continuous 5-LEAD PLASTIC TSOT-23 T = 125C, = 80C/W TO 150C/W BAT Pin Current .................................................. 200mA JMAX JA DEPENDING ON PCB BOARD LAYOUT (NOTE 3) PROG Pin Current .................................................1.5mA Maximum Junction Temperature .......................... 125C Operating Temperature Range (Note 2)....40C to 85C Storage Temperature Range .................. 65C to 125C Lead Temperature (Soldering, 10 sec) ...................300C o r Der i n F Ma T LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE LTC4054LES5-4.2 PBF LTC4054LES5-4.2 TRPBF LTAFA 5-Lead Plastic TSOT-23 40C to 85C 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: