POWER LOSS (mW) LTC3129-1 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 3129-1 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 IN IN OUT Start-Up (Bootstrapped) includes an accurate RUN pin threshold to allow predict- n Fixed Output Voltage with Eight User-Selectable able regulator turn-on and a maximum power point control Settings from 2.5V to 15V (MPPC) capability that ensures maximum power extraction n 200mA Output Current in Buck Mode from non-ideal power sources such as photovoltaic panels. n Single Inductor The LTC3129-1 employs an ultralow noise, 1.2MHz PWM n 1.3A Quiescent Current switching architecture that minimizes solution footprint by n Programmable Maximum Power Point Control allowing the use of tiny, low profile inductors and ceramic n 1.2MHz Ultralow Noise PWM capacitors. Built-in loop compensation and soft-start n Current Mode Control simplify the design. For high efficiency operation at light n Pin Selectable Burst Mode Operation loads, automatic Burst Mode operation can be selected, n Up to 95% Efficiency reducing the quiescent current to just 1.3A. To further n Accurate RUN Pin Threshold reduce part count and improve light load efficiency, the n Power Good Indicator LTC3129-1 includes an internal voltage divider to provide n 10nA Shutdown Current eight selectable fixed output voltages. n Thermally Enhanced 3mm 3mm QFN and Additional features include a power good output, less than 16-Lead MSOP Packages 10nA of shutdown current and thermal shutdown. Ta The LTC3129-1 is available in thermally enhanced n Industrial Wireless Sensor Nodes 3mm3mm QFN and 16-lead MSOP packages. For an n Post-Regulator for Harvested Energy adjustable output voltage, see the functionally equivalent n Solar Panel Post-Regulator/Charger LTC3129. n Intrinsically Safe Power Supplies L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks n of Linear Technology Corporation. All other trademarks are the property of their respective owners. Wireless Microphones n Avionics-Grade Wireless Headsets Typical Ta Efficiency and Power Loss vs Load 22nF 22nF 10H 100 1000 EFFICIENCY 90 BST1 SW1 SW2 BST2 V OUT 80 100 V IN V V 5V AT IN OUT 2.42V TO 15V 70 100mA V < V IN OUT 10F LTC3129-1 200mA V > V IN OUT 60 10 RUN 10F 50 POWER LOSS 40 1 MPPC PGOOD V CC AA OR AAA 30 BATTERIES V = 2.5V PWM IN 20 0.1 V = 3.6V IN VS1 V CC V = 5V 10 IN V = 15V V = 5V IN VS2 OUT 0 0.01 VS3 2.2F 0.01 0.1 1 10 100 1000 GND PGND OUTPUT CURRENT (mA) 3129 TA01b 31291 TA01a 31291fc 1 For more information www.linear.com/LTC3129-1 EFFICIENCY (%) ion pplica ions pplica ion uresLTC3129-1 Ta e MaxiMMu Tar (Notes 1, 8) V , V Voltages ..................................... 0.3V to 18V V , PWM, MPPC, VS1, VS2, IN OUT CC SW1 DC Voltage .............................. 0.3V to (V + 0.3V) VS3 Voltages ............................................... 0.3V to 6V IN SW2 DC Voltage............................0.3V to (V + 0.3V) PGOOD Sink Current ..............................................15mA OUT SW1, SW2 Pulsed (<100ns) Voltage ..............1V to 19V Operating Junction Temperature Range BST1 Voltage .....................(SW1 0.3V) to (SW1 + 6V) (Notes 2, 5) ............................................ 40C to 125C BST2 Voltage .....................(SW2 0.3V) to (SW2 + 6V) Storage Temperature Range .................. 65C to 150C RUN, PGOOD Voltage ................................. 0.3V to 18V MSE Lead Temperature (Soldering, 10 sec) ..........300C p Fc T TOP VIEW TOP VIEW 16 15 14 13 V 1 16 V CC IN BST1 1 12 V RUN 2 15 BST1 OUT MPPC 3 14 SW1 V 2 11 PGOOD IN 4 17 GND 17 13 PGND VS3 5 12 SW2 PGND PGND V 3 10 PWM CC 6 VS2 11 BST2 RUN 4 9 VS1 VS1 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-1 PBF LTC3129EUD-1 TRPBF LGDS 16-Lead (3mm 3mm) Plastic QFN 40C to 125C LTC3129IUD-1 PBF LTC3129IUD-1 TRPBF LGDS 16-Lead (3mm 3mm) Plastic QFN 40C to 125C LTC3129EMSE-1 PBF LTC3129EMSE-1 TRPBF 31291 16-Lead Plastic MSOP 40C to 125C LTC3129IMSE-1 PBF LTC3129IMSE-1 TRPBF 31291 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: