TPS5430

This is a small DC-DC Buck converter board based on the TPS5430 from TI specifically intended to be ordered from JLCPCB with few "extended parts". This was a practice project for me, so please feel free to point out any issues.

Features

• V_in = 5.5V..36V
• V_{in_min} = 1.15 * V_out (see Datasheet Section 8.2.1.2.8.1)
• V_{in_max} = 8.33 * (V_out + 0.5) (see Datasheet Section 8.2.1.2.8.1)
• V_out = 1.8V/3.3V/5V/12V (choose via solder bridge)
• Reverse polarity protection with AO3401A p-MOSFET
• 3A (hold)/6A (trip) polyfuse input protection
• The board can be powered with a 2.1mm/5.5mm "standard" Arduino compatible barrel jack connector.
• Status LED

Schematic

The design was done in KiCAD 6 nightly (aka 5.99) and follows the TPS5430 datasheet (Section 8.2.1) reasonably close in the schmatic as well as the layout (Section 10.2).

Deviations are:

• 2x 100uF tantalum capacitors instead of 1x 220uF, since those are basic parts at JLCPCB
• As suggested a 10uF output bypass capacitor is added
• 4x 10uF input capacitors instead of only 1x
• Multiple output voltage options through increased Inductor (47uH instead of 15uH) and solder jumpers. All outputs should work with the full 3A

License

Licensed under CERN-OHL-S v2 or any later version. See LICENSE for more information.

Contact

Max Stabel - https://max.stabel.family/

Project Link: https://github.com/M4a1x/TPS5430

Acknowledgements

• Philip Salamony and his BananaSchplit Project and Video
• ugurozkan52/TPS5430_Power_Module which inspired me to add the output voltage jumpers