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.
- Vin = 5.5V..36V
- Vinmin = 1.15 * Vout (see Datasheet Section 8.2.1.2.8.1)
- Vinmax = 8.33 * (Vout + 0.5) (see Datasheet Section 8.2.1.2.8.1)
- Vout = 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
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
Licensed under CERN-OHL-S v2 or any later version. See LICENSE for more information.
Max Stabel - https://max.stabel.family/
Project Link: https://github.com/M4a1x/TPS5430
- Philip Salamony and his BananaSchplit Project and Video
- ugurozkan52/TPS5430_Power_Module which inspired me to add the output voltage jumpers