LTC4067 USB Power Manager with OVP and Li-Ion/Polymer Charger FEATURES DESCRIPTIO Programmable Input Current Limit: The LTC 4067 is a USB power management and Li-Ion/ Single Resistor at CLPROG Pin to Set and Monitor Polymer battery charger designed for portable battery Input Current powered applications. The part controls total current used by the USB peripheral for operation and battery charging. Battery Charger/Ideal Diode/Controller: The total input current may be left unregulated, or it may 13V Overvoltage Protection be limited to 20% or 100% of the programmed value up Full Featured Battery Charger with 4.2V Float to 1.5A (typically 500mA). Battery charge current is au- Up to 1.25A Programmable Charge Current tomatically reduced such that the sum of the load current Thermal Regulation Maximizes Charge Current and the charge current does not exceed the programmed Without Risk of Overheating input current. Internal 2 Hour Termination Timer from Onset of Voltage Mode Charging With the addition of an external P-channel MOSFET the Automatic Load Switchover to Battery Power with LTC4067 can withstand voltages up to 13V. Internal Ideal Diode and Drive Output for Optional The LTC4067 includes a complete constant current/con- External MOSFET stant voltage linear charger for single cell Li-Ion batteries. NTC Thermistor Input The oat voltage applied to the battery is held to a tight Bad Battery Time-Out Detection 0.4% tolerance, and charge current is programmed using 4mm 3mm 12-Lead DFN Package an external resistor to ground. An end-of-charge status U output, CHRG, indicates full charge. Also featured is an APPLICATIO S NTC thermistor input used to monitor battery temperature while charging. Automatic Battery Charging/Load Switchover Backup Battery Charger The LTC4067 is available in a 12-lead low pro le 4mm Uninterrupted Supplies 3mm DFN package. , LTC and LT are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATIO OVP Response to Ramp Input at OVI I LOAD OVI OUT WALL 10nF V OVI 10F OR 5V/DIV OVP USB 5V TO 12V IN I BAT IN 500mA/DIV 1F 10F 1-CELL LTC4067 Li-Ion V OUT 5V/DIV V = 4.2V BAT I I I I CHRG LIM0 LIM1 IN(MAX) LIM0 V OVP I PROG 5V/DIV LIM1 L H O (SUSPEND) 4067 TA01b L L 200V/R CLPROG 1ms/DIV CLPROG GND 2k H H 1000V/R CLPROG 2k 4067 TA01 H L FIXED (2A) 4067f 1 U ULTC4067 ABSOLUTE AXI U RATI GS PACKAGE/ORDER INFORMATION (Note 1) TOP VIEW IN, OUT, BAT Voltage CLPROG 1 12 IN (t < 1ms, Duty Cycle < 1%) ...................... 0.3V to 7V CHRG 2 11 OUT Steady State, IN, OUT, BAT Voltage .............. 0.3V to 6V NTC 3 10 BAT NTC, I , I , PROG, CLPROG, CHRG, GATE LIM0 LIM1 13 I 4 9 GATE LIM0 Voltages (Note 6) ....................................0.3V to V CC I 5 8 PROG LIM1 OVI, OVP Voltages ..................................... 0.3V to 13V OVI 6 7 OVP Operating Temperature Range ................. 40C to 85C Storage Temperature Range ................... 65C to 125C DE PACKAGE 12-LEAD (4mm 3mm) PLASTIC DFN Max Junction Temperature (T ) ..................... 125C JMAX T = 125C, = 43C/W JMAX JA EXPOSED PAD (PIN 13) IS GND, MUST BE SOLDERED TO PCB ORDER PART NUMBER DE PART MARKING LTC4067EDE 4067 Order Options Tape and Reel: Add TR Lead Free: Add PBF Lead Free Tape and Reel: Add TRPBF Lead Free Part Marking: