# Step 15: Heatsink vias

Heatsink vias where the heat is: for every part that dissipates real power (the regulator, the inductor, the catch diode, the FETs), an array of vias in its thermal pad or the copper it dumps heat into, stitched to the ground or the plane on the other side, sized and counted from its dissipation; the AI reviews the plan and the binary lands it.

## Visits

- 2026-10-18T20:45:27Z
- 2026-10-18T22:04:09Z

## What the binary checked

### thermal-vias

- **acked**: L1, U1
- **landed**: 0
- **short**: 0 item(s)

### thermal-vias-plan

- **parts**: 2 item(s)
- **plan**: ./aiflow-run/plan-thermal-vias.json
- **pourFreshness**: 0 item(s)

## Screenshots and drawings

**start**

![start](pub-shot-thermal-vias-1-start.png)

**end**

![end](pub-shot-thermal-vias-1-end.png)

**start**

![start](pub-shot-thermal-vias-2-start.png)

**end**

![end](pub-shot-thermal-vias-2-end.png)

## Clips

::adom-video{video="/john/tps54202-12v-5v-buck-20261018/render/docs/clips/pub-window-19530338-20261018-204615-10x.mp4" poster="/john/tps54202-12v-5v-buck-20261018/render/docs/clips/pub-window-19530338-20261018-204615-poster.jpg" title="Heatsink vias, visit 1 (10x)" muted="true"}

::adom-video{video="/john/tps54202-12v-5v-buck-20261018/render/docs/clips/pub-window-19530338-20261018-220452-10x.mp4" poster="/john/tps54202-12v-5v-buck-20261018/render/docs/clips/pub-window-19530338-20261018-220452-poster.jpg" title="Heatsink vias, visit 2 (10x)" muted="true"}

## AI usage (Google Antigravity)

54 model calls: 165,280 fresh input, 8,088,632 cached input and 42,603 output tokens.