POWER LOSS (mW) LTC3129 15V, 200mA Synchronous Buck-Boost DC/DC Converter with 1.3A Quiescent Current FeaT DescripT n Regulates V Above, Below or Equal to V The LTC 3129 is a high efficiency, 200mA buck-boost OUT IN n Wide V Range: 2.42V to 15V, 1.92V to 15V After DC/DC converter with a wide V and V range. It includes IN IN OUT Start-Up (Bootstrapped) an accurate RUN pin threshold to allow predictable regula- n Wide V Range: 1.4V to 15.75V tor turn-on and a maximum power point control (MPPC) OUT n 200mA Output Current in Buck Mode capability that ensures maximum power extraction from n Single Inductor non-ideal power sources such as photovoltaic panels. n 1.3A Quiescent Current The LTC3129 employs an ultralow noise, 1.2MHz PWM n Programmable Maximum Power Point Control switching architecture that minimizes solution footprint by n 1.2MHz Ultralow Noise PWM allowing the use of tiny, low profile inductors and ceramic n Current Mode Control capacitors. Built-in loop compensation and soft-start n Pin Selectable Burst Mode Operation simplify the design. For high efficiency operation at light n Up to 95% Efficiency loads, automatic Burst Mode operation can be selected, n Accurate RUN Pin Threshold reducing the quiescent current to just 1.3A. n Power Good Indicator n Additional features include a power good output, less than 10nA Shutdown Current n 10nA of shutdown current and thermal shutdown. Thermally Enhanced 3mm 3mm QFN and 16-Lead MSOP Packages The LTC3129 is available in thermally enhanced 3mm 3mm QFN and 16-lead MSOP packages. For fixed output Ta voltage options, see the functionally equivalent LTC3129-1, n Industrial Wireless Sensor Nodes which eliminates the need for an external feedback divider. n Post-Regulator for Harvested Energy L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks n Solar Panel Post-Regulator/Charger and PowerPath is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. n Intrinsically Safe Power Supplies n Wireless Microphones n Avionics-Grade Wireless Headsets Typical Ta 22nF 22nF Efficiency and Power Loss vs Load 10H 100 1000 5V AT 200mA, V > 5V IN EFFICIENCY 90 5V AT 100mA, V < 5V BST1 SW1 SW2 BST2 IN 2.42V TO 15V 80 100 V V V V IN IN OUT OUT 70 10F 10pF LTC3129 60 10 3.32M RUN 10F 50 POWER LOSS V MPPC FB 40 1 CC 30 PGOOD PWM 1.02M V = 2.5V IN 20 0.1 V = 3.6V IN V CC V = 5V 10 IN V = 5V V = 15V IN OUT 0 0.01 2.2F GND PGND 0.01 0.1 1 10 100 1000 OUTPUT CURRENT (mA) 3129 TA01b 3129 TA01a 3129fc 1 For more information www.linear.com/LTC3129 EFFICIENCY (%) ion pplica ions pplica ion uresLTC3129 Ta e MaxiMMu Tar (Notes 1, 8) V , V Voltages .................................... 0.3V to 18V V , FB, PWM, MPPC Voltages .................... 0.3V to 6V IN OUT CC SW1 DC Voltage ............................ 0.3V to (V + 0.3V) PGOOD Sink Current .............................................15mA IN SW2 DC Voltage..........................0.3V to (V + 0.3V) Operating Junction Temperature Range OUT SW1, SW2 Pulsed (<100ns) Voltage ..............1V to 19V (Notes 2, 5) ............................................ 40C to 125C BST1 Voltage ....................(SW1 0.3V) to (SW1 + 6V) Storage Temperature Range .................. 65C to 150C BST2 Voltage ....................(SW2 0.3V) to (SW2 + 6V) MSE Lead Temperature (Soldering, 10 sec) ..........300C RUN, PGOOD Voltages ............................... 0.3V to 18V p Fc T TOP VIEW TOP VIEW 16 15 14 13 V 1 16 V CC IN 2 BST1 1 12 V RUN 15 BST1 OUT MPPC 3 14 SW1 V 2 11 PGOOD IN 4 17 17 GND 13 PGND FB 5 PGND 12 SW2 PGND V 3 10 PWM CC 6 NC 11 BST2 RUN 4 9 NC NC 7 10 V OUT 8 PWM 9 PGOOD 5 6 7 8 MSE PACKAGE 16-LEAD PLASTIC MSOP T = 125C, = 10C/W, = 40C/W (NOTE 6) JMAX JC JA UD PACKAGE EXPOSED PAD (PIN 17) IS PGND, MUST BE SOLDERED TO PCB 16-LEAD (3mm 3mm) PLASTIC QFN T = 125C, = 7.5C/W, = 68C/W (NOTE 6) JMAX JC JA EXPOSED PAD (PIN 17) IS PGND, MUST BE SOLDERED TO PCB Dro Fni MTa LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC3129EUD PBF LTC3129EUD TRPBF LGDR 16-Lead (3mm 3mm) Plastic QFN 40C to 125C LTC3129IUD PBF LTC3129IUD TRPBF LGDR 16-Lead (3mm 3mm) Plastic QFN 40C to 125C LTC3129EMSE PBF LTC3129EMSE TRPBF 3129 16-Lead Plastic MSOP 40C to 125C LTC3129IMSE PBF LTC3129IMSE TRPBF 3129 16-Lead Plastic MSOP 40C to 125C Consult LTC Marketing for parts specified with wider operating temperature ranges. For more information on lead free part marking, go to: