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DC1922A - LTC3129 Demo Board | Micropower, Sync Buck-Boost, 2.42V ≤ VIN ≤ 15V, Vout = 5V @ 200mA

Demonstration Circuit 1922A features the LTC®3129, 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. 

DC1922A - Schematic

 


Software

LTspice

LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice

To launch a ready to run LTspice demonstration circuit for this part:

  • Step 1: If you have not installed LTspice on this computer, download and install LTspice
  • Step 2: Once LTspice is installed, click on the link(s) below to launch the simulation
  • Step 3: If LTspice does not automatically open after clicking the link above, 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

To explore other ready to run LTspice demonstration circuits, please visit our Demo Circuits Collection.

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