LTC3330 Nanopower Buck-Boost DC/DC with Energy Harvesting Battery Life Extender FEATURES DESCRIPTION n Dual Input, Single Output DC/DCs with Input The LTC 3330 integrates a high voltage energy harvesting Prioritizer power supply plus a DC/DC converter powered by a primary n Energy Harvesting Input: 3.0V to 19V Buck DC/DC cell battery to create a single output supply for alternative n Primary Cell Input: 1.8V to 5.5V Buck-Boost DC/DC energy applications. The energy harvesting power sup- n Zero Battery I When Energy Harvesting Source is ply, consisting of an integrated full-wave bridge rectifier Q Available and a high voltage buck converter, harvests energy from n Ultralow Quiescent Current: 750nA at No-Load piezoelectric, solar, or magnetic sources. The primary cell n Low Noise LDO Post Regulator input powers a buck-boost converter capable of opera- n Integrated Supercapacitor Balancer tion down to 1.8V at its input. Either DC/DC converter n Up to 50mA of Output Current can deliver energy to a single output. The buck operates n Programmable DC/DC and LDO Output Voltages, when harvested energy is available, reducing the quiescent Buck UVLO, and Buck-Boost Peak Input Current current draw on the battery to essentially zero, thereby n Integrated Low Loss Full-Wave Bridge Rectifier extending the life of the battery. The buck-boost powers n Input Protective Shunt: Up to 25mA at V 20V V only when harvested energy goes away. IN OUT n 5mm 5mm QFN-32 Package A low noise LDO post regulator and a supercapacitor balancer are also integrated, accommodating a wide range APPLICATIONS of output storage configurations. Voltage and current set- n tings for both inputs and outputs are programmable via Energy Harvesting n pin-strapped logic inputs. The LTC3330 is available in a Solar Powered Systems with Primary Cell Backup n 5mm 5mm QFN-32 package. Wireless HVAC Sensors and Security Devices n L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and Mobile Asset Tracking PowerPath is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATION Extended Battery Life with AC1 AC2 PIEZO Energy Harvesting 22H + 3V TO 19V MIDE V SW IN V25W SOLAR 22H LTC3330 V 22F 1F OUT PANEL SWA 50mV/DIV 25V 6.3V AC-COUPLED CAP SWB 4.7F, 6.3V 1.8V TO 5V V V IN2 OUT EH ON 50mA 2V/DIV LDO IN 47F 0V 6.3V 10mF BAT SCAP 2.7V 4.7F PRIMARY + ACTIVE ENERGY BAL 6.3V CELL IBAT HARVESTER 10mF 1.8V TO 5.5V 3 100mA/DIV REDUCES BATTERY OUT 2:0 2.7V CURRENT TO ZERO 3 0A LDO 2:0 EH ON OPTIONAL 3 IPK 2:0 PGVOUT 3330 TA01b BAT = 3.6V 200s/DIV 4 V = 1.8V UV 3:0 PGLDO OUT I = 50mA LOAD 1.2V TO 3.3V LDO EN LDO OUT 50mA V IN3 1F 22F GND 6.3V 6.3V 3330 TA01a 3330fc For more information www.linear.com/LTC3330 1LTC3330 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) TOP VIEW V IN Low Impedance Source ..........................0.3 to 19V* Current-Fed, I = 0A ........................................25mA SW 32 31 30 29 28 27 26 25 AC1, AC2 .............................................................0 to V IN BAL 1 24 LDO0 BAT, V , V , LDO IN, SCAP, PGVOUT, OUT IN3 SCAP 2 23 LDO1 PGLDO, LDO EN .............................................0.3 to 6V V LDO2 3 22 IN2 V ....................0.3V to Lesser of (V + 0.3V) or 6V IN2 IN UV3 4 21 LDO IN 33 CAP ...................... Higher of 0.3V or (V 6V) to V GND IN IN UV2 5 20 LDO OUT LDO OUT, LDO 2:0 .................0.3V to LDO IN + 0.3V UV1 6 19 IPK2 BAL ...............................................0.3V to SCAP + 0.3V UV0 7 18 IPK1 AC1 8 17 IPK0 OUT 2:0 , IPK 2:0 , 9 10 11 12 13 14 15 16 EH ON .............0.3V to Lesser of (V + 0.3V) or 6V IN3 UV 3:0 ............ 0.3V to Lesser of (V + 0.3V) or 6V IN2 I , I ..............................................................50mA AC1 AC2 UH PACKAGE I , I , I , I ..........................................350mA 32-LEAD (5mm 5mm) PLASTIC QFN SW SWA SWB VOUT T = 125C, = 44C/W JMAX JA I .................................................................50mA LDO OUT EXPOSED PAD (PIN 33) IS GND, MUST BE SOLDERED TO PCB Operating Junction Temperature Range (Notes 2, 3) ............................................ 40C to 125C Storage Temperature Range .................. 65C to 150C *V has an internal 20V clamp IN ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC3330EUH PBF LTC3330EUH TRPBF 3330 32-Lead (5mm 5mm) Plastic QFN 40C to 85C LTC3330IUH PBF LTC3330IUH TRPBF 3330 32-Lead (5mm 5mm) Plastic QFN 40C to 125C Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. For more information on lead free part marking, go to: