BATTERY VOLTAGE (V) LTC4069-4.4 Standalone 750mA Li-Ion Battery Charger in 2 2 DFN with NTC Thermistor Input FEATURES DESCRIPTION n Complete Linear Charger in 2mm 2mm DFN The LTC 4069-4.4 is a complete constant-current/ Package constant-voltage linear charger for high capacity single-cell n C/10 Charge Current Detection Output lithium-ion batteries with a 4.4V oat voltage. The 2mm n Timer Charge Termination 2mm DFN package and low external component count n Charge Current Programmable Up to 750mA with make the LTC4069-4.4 especially well-suited for portable 5% Accuracy applications. Furthermore, LTC4069-4.4 is speci cally n No External MOSFET, Sense Resistor or Blocking designed to work within USB power speci cations. Diode Required The CHRG pin indicates when charge current has dropped n NTC Thermistor Input for Temperature Quali ed to ten percent of its programmed value (C/10). An Charging internal timer terminates charging according to battery n Preset 4.4V Float Voltage with 0.6% Accuracy manufacturer speci cations. n Constant-Current/Constant-Voltage Operation with Thermal Feedback to Maximize Charge Rate No external sense resistor or blocking diode is required due to Without Risk of Overheating the internal MOSFET architecture. Thermal feedback regulates n Charge Current Monitor Output for Gas Gauging charge current to limit the die temperature during high power n Automatic Recharge operation or high ambient temperature conditions. n Charges Single-Cell Li-Ion Batteries Directly from When the input supply (wall adapter or USB supply) is USB Port removed, the LTC4069-4.4 automatically enters a low current n 20A Supply Current in Shutdown Mode state, dropping battery drain current to less than 1A. With n Soft-Start Limits Inrush Current power applied, LTC4069-4.4 can be put into shutdown mode, n Tiny 6-Lead (2mm 2mm) DFN Package reducing the supply current to less than 20A. APPLICATIONS The LTC4069-4.4 also includes automatic recharge, low- battery charge conditioning (trickle charging), soft-start n Wireless PDAs (to limit inrush current) and an NTC thermistor input used n Cellular Phones to monitor battery temperature. n Portable Electronics The LTC4069-4.4 is available in a tiny 6-lead, low pro le , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. (0.75mm) 2mm 2mm DFN package. Protected by U.S. Patents, including 6522118, 6700364. Complete Charge Cycle (1100mAh Battery) TYPICAL APPLICATION 550 4.5 CONSTANT-CURRENT Standalone Li-Ion Battery Charger 500 4.4 450 4.3 500mA CHRG 400 4.2 V IN TRANSITION V BAT CC 4.5V TO 5.5V 350 4.1 CONSTANT- R1 LTC4069-4.4 VOLTAGE R 300 4.0 NOM 510 100k CHRG PROG 4.4V + 250 3.9 Li-Ion NTC GND 200 3.8 BATTERY* R PROG 150 3.7 R 1F NTC 2k 100k CHARGE 100 3.6 4069 TA01 TERMINATION V = 5V CC 50 3.5 R = 2K PROG *E.G. SANYO BATTERIES: UF553436T OR UF553450T 0 3.4 0 1 1.5 2 2.5 3 3.5 4 4.5 5 0.5 TIME (HOURS) 4069 TA01b 406944fa 1 CHARGE CURRENT (mA)LTC4069-4.4 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) TOP VIEW V CC t < 1ms and Duty Cycle < 1% ................. 0.3V to 7V GND 1 6 PROG Steady State ............................................ 0.3V to 6V 2 7 CHRG 5 NTC BAT, CHRG .................................................. 0.3V to 6V BAT 3 4 V CC PROG, NTC ..................................... 0.3V to V + 0.3V CC BAT Short-Circuit Duration ............................Continuous DC PACKAGE 6-LEAD (2mm 2mm) PLASTIC DFNs BAT Pin Current .................................................. 800mA T = 125C, = 60C/W (NOTE 3) JMAX JA PROG Pin Current ................................................ 800A 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 LTC4069EDC-4.4 PBF LTC4069EDC-4.4 TRPBF LCKQ 6-Lead (2mm X 2mm) Plastic DFN 40C to 85C Consult LTC Marketing for parts speci ed with wider operating temperature ranges. Consult LTC Marketing for information on non-standard lead based nish parts. For more information on lead free part marking, go to: