LTC3129
Info : RECOMMENDED FOR NEW DESIGNS
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LTC3129

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

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 9
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)
  • 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
Additional Details
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The LTC3129 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.

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
Part Models 9
1ku List Price Starting From $3.54

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Documentation

Documentation

Video

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
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Product Lifecycle

PCN

Feb 4, 2020

- 20_0132

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

LTC3129EMSE#PBF

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LTC3129EMSE#TRPBF

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Filter by Model

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Product Lifecycle

PCN

Feb 4, 2020

- 20_0132

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

LTC3129EMSE#PBF

PRODUCTION

LTC3129EMSE#TRPBF

PRODUCTION

LTC3129IMSE#PBF

PRODUCTION

LTC3129IMSE#TRPBF

PRODUCTION

LTC3129IMSE-1#PBF

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

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DC1922A

LTC3129 Demo Board | Micropower, Sync Buck-Boost, 2.42V ≤ VIN ≤ 15V, VOUT = 5V @ 200mA

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DC1922A

LTC3129 Demo Board | Micropower, Sync Buck-Boost, 2.42V ≤ VIN ≤ 15V, VOUT = 5V @ 200mA

LTC3129 Demo Board | Micropower, Sync Buck-Boost, 2.42V ≤ VIN ≤ 15V, VOUT = 5V @ 200mA

Product Detail

Demonstration Circuit 1922A features the LTC3129, a high efficiency 200mA buck-boost DC/DC converter with a wide VIN and VOUT range. The DC1922A demo board has two user selectable operating modes: Burst Mode® Operation and Fixed Frequency PWM (JP3). There is also an accurate programmable RUN pin which is used to ENABLE the converter (JP1). The LTC3129 also incorporates a maximum power point control function which can be enabled (JP2) for applications where the input source is a solar cell or is high impedance, such as intrinsically safe applications or high ZOUT thermal electric generators (TEGs).

The DC1922A operates with a 2.42V to 15V input voltage range, and has been designed with the output voltage set to 5.0V. Once the converter is started the LTC3129 can operate with VIN as low as 1.92V provided VCC is backfed. The demo board has optional provisions to backfeed VCC (D1) in order to increase efficiency in some 5V output applications, or to allow operation with VIN down to 1.92V.
Tools & Simulations

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.

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