Datasheet Linear Technology LTC3129EMSE#TRPBF
15 V, 200 mA Synchronous Buck-Boost DC/DC Converter with 1.3 µA Quiescent Current
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FEATURES LTC3129 15V, 200mA Synchronous Buck-Boost DC/DC Converter with 1.3µA Quiescent Current DESCRIPTION
The LTC®3129 is a high efficiency, 200mA buck-boost DC/DC converter with a wide VIN and VOUT range. It includes an accurate RUN pin threshold to allow predictable regulator turn-on and a maximum power point control (MPPC) capability that ensures maximum power extraction from non-ideal power sources such as photovoltaic panels. The LTC3129 employs an ultralow noise, 1.2MHz PWM switching architecture that minimizes solution footprint by allowing the use of tiny, low profile inductors and ceramic capacitors. Built-in loop compensation and soft-start simplify the design. For high efficiency operation at light loads, automatic Burst Mode operation can be selected, reducing the quiescent current to just 1.3µA. Additional features include a power good output, less than 10nA of shutdown current and thermal shutdown. The LTC3129 is available in thermally enhanced 3mm × 3mm QFN and 16-lead MSOP packages. For fixed output voltage options, see the functionally equivalent LTC3129-1, which eliminates the need for an external feedback divider.
L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks and PowerPath is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. n Regulates VOUT Above, Below or Equal to VIN Wide VIN Range: 2.42V to 15V, 1.92V to 15V After Start-Up (Bootstrapped) Wide VOUT Range: 1.4V to 15.75V 200mA Output Current in Buck Mode Single Inductor 1.3µA Quiescent Current Programmable Maximum Power Point Control 1.2MHz Ultralow Noise PWM Current Mode Control Pin Selectable Burst Mode® Operation Up to 95% Efficiency Accurate RUN Pin Threshold Power Good Indicator 10nA Shutdown Current Thermally Enhanced 3mm × 3mm QFN and 16-Lead MSOP Packages Industrial Wireless Sensor Nodes Post-Regulator for Harvested Energy Solar Panel Post-Regulator/Charger Intrinsically Safe Power Supplies Wireless Microphones Avionics-Grade Wireless Headsets APPLICATIONS TYPICAL APPLICATION
22nF 10µH 22nF 5V AT 200mA, VIN > 5V 5V AT 100mA, VIN < 5V VOUT EFFICIENCY (%) 10µF 3.32M FB PGOOD VCC GND PGND 2.2µF 1.02M 10pF 100 90 80 70 60 50 40 30 20 POWER LOSS 10 EFFICIENCY 100 POWER LOSS (mW) Efficiency and Power Loss vs Load
1000 2.42V TO 15V VIN BST1 SW1 VIN SW2 BST2 VOUT LTC3129 RUN 10µF VCC MPPC PWM 1 VIN = 2.5V 0.1 VIN = 3.6V VIN = 5V 10 VIN = 15V VOUT = 5V 0 0.01 0.01 0.1 1 10 100 1000 OUTPUT CURRENT (mA)
3129 TA01b 3129 TA01a 3129fb For more information www.linear.com/LTC3129 1 ...
Power Management > Switching Regulator > Buck-Boost Regulator > Internal Power Switch Buck-Boost
Other Names: LTC3129EMSETRPBF, LTC3129EMSE TRPBF
Docket:FEATURES LTC3129 15V, 200mA Synchronous Buck-Boost DC/DC Converter with 1.3µA Quiescent Current DESCRIPTION
The LTC®3129 is a high efficiency, 200mA buck-boost DC/DC converter with a wide VIN and VOUT range. It includes an accurate RUN pin threshold to allow predictable regulator turn-on and a maximum power point control (MPPC) capability that ensures maxim...