LTC3129-1
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LTC3129-1

15V, 200mA Synchronous Buck-Boost DC/DC Converter with 1.3μA Quiescent Current

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LTspice LTC3129-1 Demo Circuit - µPower, Synchronous Buck-Boost Converter (2.4-15V to 5V @ 200mA) Download 2.65 KB LTspice LTC3129-1 - Buck-Boost Regulators Download 1.64 KB
Part Models 7
1ku List Price Starting From $3.54
Features
  • Regulates VOUT Above, Below or Equal to VIN
  • Wide VIN Range: 2.42V to 15V, 1.92V to 15V After Start-Up (Bootstrapped)
  • Fixed Output Voltage with Eight User-Selectable Settings from 2.5V to 15V
  • 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
Additional Details
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The LTC3129-1 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 LTC3129-1 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. To further reduce part count and improve light load efficiency, the LTC3129-1 includes an internal voltage divider to provide eight selectable fixed output voltages.

Additional features include a power good output, less than 10nA of shutdown current and thermal shutdown.

The LTC3129-1 is available in thermally enhanced 3mm × 3mm QFN and 16-lead MSOP packages. For an adjustable output voltage, see the functionally equivalent LTC3129.

Output Voltage
LTC3129 Adjustable 1.4V to 15.75V via resistor divider
LTC3129-1 8 pin programmable output voltages from 2.5V to 15V


Applications

  • Industrial Wireless Sensor Nodes
  • Post-Regulator for Harvested Energy
  • Solar Panel Post-Regulator/Charger
  • Intrinsically Safe Power Supplies
  • Wireless Microphones
  • Avionics-Grade Wireless Headsets
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file View Data Sheet
Documentation View All Documentation
LTspice LTC3129-1 Demo Circuit - µPower, Synchronous Buck-Boost Converter (2.4-15V to 5V @ 200mA) Download 2.65 KB LTspice LTC3129-1 - Buck-Boost Regulators Download 1.64 KB
Part Models 7
1ku List Price Starting From $3.54
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LTC3129-1

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UPDATED 10/29/2015
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LTC3129-1: 15V, 200mA Synchronous Buck-Boost DC/DC Converter with 1.3μA Quiescent Current Data Sheet

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UPDATED 01/07/2015
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LTC3129-1: 静止電流が1.3μAの15V、200mA同期整流式昇降圧DC/DCコンバータ データシート

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DC1923A - Demo Manual redirect icon

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Documentation

Solutions Bulletin & Brochure 1

15V Sync Buck-Boost, IQ=1.3μA

3rd Party Solutions 1

MIKROE-2806, Click Board, Buck -Boost Click; Featuring LTC3129-1

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2017-09-18

LTC3129 Video Product Brief

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ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LTC3129EMSE-1#PBF 16-Lead MSOP w/ EP external-link
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LTC3129EMSE-1#TRPBF 16-Lead MSOP w/ EP external-link
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LTC3129EUD-1#PBF 16-Lead QFN (3mm x 3mm x 0.75mm w/ EP) external-link
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LTC3129EUD-1#TRPBF 16-Lead QFN (3mm x 3mm x 0.75mm w/ EP) external-link
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LTC3129IMSE-1#TRPBF 16-Lead MSOP w/ EP external-link
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LTC3129IUD-1#PBF 16-Lead QFN (3mm x 3mm x 0.75mm w/ EP) external-link
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LTC3129IUD-1#TRPBF 16-Lead QFN (3mm x 3mm x 0.75mm w/ EP) external-link
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Jun 5, 2024

- 24_0003

Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2)

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Laser Top Mark for 16-Lead MSOP Packages Assembled in ADPG and UTAC

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Jun 5, 2024

- 24_0003

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Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2)

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LTC3129EMSE-1#TRPBF

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LTC3129IMSE-1#TRPBF

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PCN24_0003_Form

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Feb 4, 2020

- 20_0132

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Laser Top Mark for 16-Lead MSOP Packages Assembled in ADPG and UTAC

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Software & Part Ecosystem

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Evaluation Kits 1

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DC1923A

LTC3129-1 Demo Board | 2.42V to 15V Input, 5VOUT at 200mA

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DC1923A

LTC3129-1 Demo Board | 2.42V to 15V Input, 5VOUT at 200mA

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DC1923A
LTC3129-1 Demo Board | 2.42V to 15V Input, 5VOUT at 200mA
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Product Detail

Demonstration circuit 1923A features the LTC3129-1, a high efficiency 200mA output buck-boost DC/DC converter with a wide VIN and VOUT range. The DC1923A operates with a 2.42V to 15V input voltage range, and has been designed with the output voltage set to 5V. The demo board can be programmed to any of eight voltage settings (2.5V, 3.3V, 4.1V, 5V, 6.9V, 8.2V, 12V, 15V) by using jumpers.


 


Resources

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DC1923A - Schematic Download

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DC1923A - Design Files Download

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DC1923A - Demo Manual Download

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Evaluation Kits1

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DC1923A

LTC3129-1 Demo Board | 2.42V to 15V Input, 5VOUT at 200mA

Tools & Simulations 1

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

spice tool Lt Spice

LTC3129-1 Demo Circuit - µPower, Synchronous Buck-Boost Converter (2.4-15V to 5V @ 200mA) Download

2.65 K

spice tool Lt Spice

LTC3129-1 - Buck-Boost Regulators Download

1.64 K

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