BATTERY VOLTAGE (V) LTC4065L/LTC4065LX/ LTC4065L-4.1/LTC4065LX-4.1 Standalone 250mA Li-Ion Battery Charger in 2 2 DFN FEATURES DESCRIPTION n Charge Current Programmable up to 250mA with The LTC 4065L is a complete constant-current/constant- 5% Accuracy voltage linear charger for single-cell lithium-ion batteries. n Complete Linear Charger in 2mm 2mm DFN Package Its small size and ability to accurately regulate low charge n C/10 Charge Current Detection Output currents make the LTC4065L especially well-suited for n Timer Termination portable applications using low capacity rechargeable n No External MOSFET, Sense Resistor or Blocking lithium-ion cells. Furthermore, LTC4065L is specifically Diode Required designed to work within USB power specifications. n Preset Float Voltage with 0.6% Accuracy: The CHRG pin indicates when charge current has dropped 4.2V for LTC4065L/LTC4065LX to ten percent of its programmed value (C/10). An internal 4.1V for LTC4065L-4.1/LTC4065LX-4.1 timer terminates charging according to battery manufac- n Constant-Current/Constant-Voltage Operation with turer specifications. Thermal Feedback to Maximize Charging Rate Without Risk of Overheating The LTC4065L-4.1/LTC4065LX-4.1 features a constant- n Charge Current Monitor Output for Gas Gauging voltage float voltage of 4.1V. This 4.1V version of the n Automatic Recharge standard LTC4065L/LTC4065LX is intended for back-up n Charges Single Cell Li-Ion Batteries Directly from or high ambient temperature applications. Under these USB Port conditions, a reduced float voltage will trade-off initial n 20A Supply Current in Shutdown Mode cell capacity for the benefit of increased capacity retention n Available Without Trickle Charge (LTC4065LX/ over the life of the battery. A reduced float voltage also LTC4065LX-4.1) minimizes swelling in prismatic and polymer cells. n Tiny 6-Lead (2mm 2mm) DFN Package When the input supply (wall adapter or USB supply) is APPLICATIONS removed, the LTC4065L automatically enters a low current n state, dropping battery drain current to less than 1A. Charger for Li-Ion Coin Cell Batteries n With power applied, LTC4065L can be put into shutdown Portable MP3 Players, Wireless Headsets n mode, reducing the supply current to less than 20A. Bluetooth Applications n Multifunction Wristwatches The full-featured LTC4065L also includes automatic All registered trademarks and trademarks are the property of their respective owners. Protected recharge, low-battery charge conditioning (trickle by U.S. Patents, including 6522118, 6700364. charging) and soft-start (to limit inrush current). Complete Charge Cycle (180mAh Battery) TYPICAL APPLICATION LTC4065L and LTC4065LX 110 Standalone Li-Ion Battery Charger 100 4.3 100mA 90 CONSTANT V IN CURRENT CONSTANT V BAT CC 80 4.1 4.3V TO 5.5V VOLTAGE R1 70 LTC4065L 510 60 3.9 CHRG PROG C1 4.2V CHRG + 1F Li-Ion TRANSITION 50 EN GND BATTERY R3 40 3.7 2k 4065L TA01 30 CHARGE TERMINATION 20 3.5 V = 5V CC 10 R = 2k PROG 0 3.3 0 1 1.5 2 2.5 3 3.5 4 4.5 0.5 TIME (HOURS) 4065 TA02 Rev. D 1 Document Feedback For more information www.analog.com CHARGE CURRENT (mA)LTC4065L/LTC4065LX/ LTC4065L-4.1/LTC4065LX-4.1 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) V CC TOP VIEW t < 1ms and Duty Cycle < 1% ..................0.3V to 7V GND 1 6 PROG Steady State ............................................. 0.3V to 6V 2 7 BAT, CHRG ................................................... 0.3V to 6V CHRG 5 EN EN, PROG .........................................0.3V to V + 0.3V BAT 3 4 V CC CC BAT Short-Circuit Duration ............................Continuous DC PACKAGE BAT Pin Current ...................................................275mA 6-LEAD (2mm 2mm) PLASTIC DFN PROG Pin Current .............................................1.342mA T = 125C, = 60C/W (NOTE 3) JMAX JA EXPOSED PAD (PIN 7) IS GND, MUST BE SOLDERED TO PCB Junction Temperature (Note 6) ............................. 125C Operating Temperature Range (Note 2)....40C to 85C Storage Temperature Range ................... 65C to 125C ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE LTC4065LEDC PBF LTC4065LEDC TRPBF LCBD 6-Lead (2mm 2mm) Plastic DFN 40C to 85C LTC4065LXEDC PBF LTC4065LXEDC TRPBF LCKS 6-Lead (2mm 2mm) Plastic DFN 40C to 85C LTC4065LEDC-4.1 PBF LTC4065LEDC-4.1 TRPBF LGGN 6-Lead (2mm 2mm) Plastic DFN 40C to 85C LTC4065LXEDC-4.1 PBF LTC4065LXEDC-4.1 TRPBF LHBJ 6-Lead (2mm 2mm) Plastic DFN 40C to 85C Contact the factory for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. Tape and reel specifications. Some packages are available in 500 unit reels through designated sales channels with TRMPBF suffix. LTC4065 Options PART NUMBER FLOAT VOLTAGE CHARGE CURRENT RANGE PIN 5 IS EN OR ACPR TRICKLE CHARGE LTC4065 4.2V 40mA TO 750mA EN YES LTC4065A 4.2V 40mA TO 750mA ACPR YES LTC4065-4.4 4.4V 40mA TO 750mA EN YES LTC4065L 4.2V 8mA TO 250mA EN YES LTC4065LX 4.2V 8mA TO 250mA EN NO LTC4065L-4.1 4.1V 8mA TO 250mA EN YES LTC4065LX-4.1 4.1V 8mA TO 250mA EN NO Rev. D 2 For more information www.analog.com