TPS54202 12 V to 5 V / 1 A Synchronous Buck Converter Molecule

WEBVTT

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This is Adom Hydrogen, with Google Antigravity running Gemini 4 Argon.

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Hydrogen's widget up top shows Antigravity's quota:

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fourteen percent of the week used before we start.

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The widgets menu is where you turn it on.

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One sentence:

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make me a twelve volt to five volt buck converter with the TPS54202, use adom-aiflow, and use KiCad.

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Argon follows adom-aiflow's twenty-five steps, and the AI Flow timeline in Hydrogen tracks every one.

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First, the fab's design rules.

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Then the circuit math, every value from the datasheet's own equations.

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Sourcing:

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every part in stock, with a part number.

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Every part has its own page on the Adom wiki, with its 3D model, right here in a Hydrogen tab.

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And the same parts arrive in KiCad:

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symbol, footprint and 3D model, from the board's own library.

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Argon draws the schematic in KiCad:

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thirty-eight symbols, zero ERC errors.

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Before any copper, it simulates the circuit in SPICE:

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start-up, ripple and a load step.

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Placement, part by part.

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Every move is a KiCad bridge call; nobody touches the mouse.

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Routing then finds the switching trace too long, and aiflow sends Argon back to placement.

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Loop back one.

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Two parts move in closer.

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Then routing again, trace by trace and net by net, every track a KiCad bridge call, to zero DRC errors and zero unconnected.

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The current analysis finds a neck in the switching copper.

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So aiflow sends Argon back to the pours to widen it.

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Loop back two.

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The thermal check then finds the inductor's copper running hotter than its budget, and sends Argon back to widen the output pour.

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Loop back four.

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Adom Fields, its own app, solves the real copper:

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current density, heat, temperature, the current flowing, the voltage on every net as a river, and then the energy itself, travelling through the board between the two copper layers.

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Then how fast a change crosses the board, one switching cycle slowed a million times, the charge on the copper, the magnetic field around the hot loop, an EMC screen against FCC class B with fifty-six decibels of margin, the ground return and a possible ground loop through two connectors, the noise couplings, and how stiff each power rail is.

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Then the silkscreen:

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every label, polarity mark and pinout, placed by the AI.

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The finished board in KiCad's 3D viewer.

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And underneath, every contact labeled.

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Finish:

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every check passes, and the Gerbers, the BOM and the pick-and-place file are exported.

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And the finished project page:

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the board in 3D, this film, every part with its icon and where to buy it, the analysis gallery, and every step of the build.

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Start to finish, the whole board used five point six percent of a week of Google AI Ultra:

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about two dollars and sixty cents of a two hundred dollar plan.