POWER LOSS (W) LTC3110 2A Bidirectional Buck-Boost DC/DC Regulator and Charger/Balancer FEATURES DESCRIPTION n V Operating Range: 0.1V to 5.5V The LTC 3110 is a 2A bidirectional buck-boost DC/DC CAP n V Operating Range: 1.71V to 5.25V regulator with capacitor charger and balancer. Its wide SYS n Automatic Switchover from Charge to Backup Mode 0.1V to 5.5V capacitor/battery voltage and 1.8V to 5.25V n Programmable 2% Accurate Charge Input Current system backup voltage ranges make it well suited to a Limit from 125mA to 2A wide variety of backup applications using supercapacitors n 1% Backup Voltage Accuracy or batteries. A proprietary low noise switching algorithm n Automatic Backup Capacitor Balancing optimizes efficiency with capacitor/battery voltages that n Fixed 1.2MHz Switching Frequency are above, below or equal to the system output voltage. n Burst Mode Operation: 40A Quiescent Current The LTC3110 can autonomously transition from charge n Built-In Programmable Multipurpose Comparator to backup mode or switch modes based on an external with Open-Collector Output command. Pin-selectable Burst Mode operation reduces n Open-Collector Outputs to Indicate Direction of standby current and improves light-load efficiency, Operation and End of Charge which combined with a 1A shutdown current make the n Thermally Enhanced TSSOP-24 and 4mm4mm LTC3110 ideally suited for backup applications. Additional QFN-24 Packages features include voltage supervisors for direction control and end of charge, and a general purpose comparator APPLICATIONS with open-collector output for interfacing with a C. The n Supercapacitor Backup Converter and Charger LTC3110 is available in thermally enhanced, low profile n Battery Backup Converter and Charger 24-lead TSSOP and 4mm 4mm QFN packages. n Servers, RAID Systems All registered trademarks and trademarks are the property of their respective owners. n RF Systems with Battery/Capacitor Backup TYPICAL APPLICATION I CHARGE FB 12V MAIN STEP-DOWN DC/DC BUS I BACKUP Backup Mode Efficiency 220nF 100 1.2 0.1V UP TO 5.5V V = 3.25V 2.2H SYS 51.1 V SYS I = 0.5A SYS 3.25V 95 1.0 10F 47F 2A 1F 1960k V SW1 SW2 SV V CAP SYS SYS 10F FBV R 90 0.8 CAP SEN 13.7k PROG 85 0.6 1.50k CMPIN 0.1F 523k 2.5V SYSTEM 80 0.4 1.8V DC/DC V MID LTC3110 976k REGULATORS 1.2V 75 0.2 FB 221k 70 0 1000k 1000k 1.2 1.8 2.4 3.0 3.6 4.2 4.8 5.4 MODE DIR V (V) CAP C CHRG 12V BUS 3110 TA01b SUPERVISOR CAPOK END OF CHRG RUN CMPOUT CAPLOW SGND PGND 3110 TA01a Rev C 1 Document Feedback For more information www.analog.com EFFICIENCY (%)LTC3110 ABSOLUTE MAXIMUM RATINGS (Note 1) V , V , SV , V , V , Storage Temperature Range .................. 65C to 150C CAP SYS SYS MODE CMPIN V , V , V , V , V ...... 0.3V to 6V Lead Soldering Temperature (Soldering, 10 sec) DIR RUN CAPOK CMPOUT CHRG R DC Current .....................................................1.6A TSSOP ..............................................................300C SEN Operating Junction Temperature Range Reflow Peak Body Temperature (30sec max) (Notes 2, 3) ............................................ 40C to 150C QFN ...................................................................260C PIN CONFIGURATION TOP VIEW TOP VIEW 1 V CAPOK 24 MID 2 V CMPOUT 23 CAP 3 V MODE 22 CAP 24 23 22 21 20 19 4 SW1 CMPIN 21 CMPIN 1 18 SW1 5 SW1 FBVCAP 20 FBVCAP 2 17 SW1 6 PGND SGND 19 25 SGND PGND 3 16 PGND 25 7 PGND DIR 18 PGND DIR 4 15 PGND 8 SW2 RUN 17 RUN 5 14 SW2 9 SW2 FB 16 FB 6 13 SW2 10 V PROG 15 SYS 7 8 9 10 11 12 11 R CHRG 14 SEN 12 V SV 13 SYS SYS UF PACKAGE FE PACKAGE 24-LEAD (4mm 4mm) PLASTIC QFN 24-LEAD PLASTIC TSSOP T = 150C, = 37C/W, = 4.5C/W, 4 LAYER BOARD JMAX JA JC T = 150C, = 33C/W, = 5C/W, 4 LAYER BOARD JMAX JA JC EXPOSED PAD (PIN 25) IS PGND, MUST BE SOLDERED TO PCB EXPOSED PAD (PIN 25) IS PGND, MUST BE SOLDERED TO PCB ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC3110EFE PBF LTC3110EFE TRPBF LTC3110FE 24-Lead Plastic TSSOP 40C to 125C LTC3110IFE PBF LTC3110IFE TRPBF LTC3110FE 24-Lead Plastic TSSOP 40C to 125C LTC3110HFE PBF LTC3110HFE TRPBF LTC3110FE 24-Lead Plastic TSSOP 40C to 150C LTC3110EUF PBF LTC3110EUF TRPBF 3110 24-Lead (4mm 4mm) Plastic QFN 40C to 125C LTC3110IUF PBF LTC3110IUF TRPBF 3110 24-Lead (4mm 4mm) Plastic QFN 40C to 125C LTC3110HUF PBF LTC3110HUF TRPBF 3110 24-Lead (4mm 4mm) Plastic QFN 40C to 150C 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. Rev C 2 For more information www.analog.com PROG MODE CHRG CMPOUT SV CAPOK SYS V V SYS MID R V SEN CAP V V SYS CAP