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

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by John Lauer

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tps54202-12v-5v-buck-20261018 / steps / 16-pours / README.md
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John Lauer Public-safe step pages and screenshots 8c8cf4d 1d ago

Step 16: Copper pours

pour every net the spec names, keepouts along Kelvin taps, thermal and stitching vias, land, measure the copper kept

Visits

  • 2026-10-18T21:03:53Z
  • 2026-10-18T21:45:54Z (a return: Open the SW patch throat across (113.7, 87.3) so peak current density drops below 60 A/mm2)
  • 2026-10-18T22:06:17Z
  • 2026-10-18T22:24:52Z (a return: Widen VOUT F.Cu pour from 52 mm2 to ~70 mm2 so L1 0.12 W copper area rise drops from 60 C to ~44 C (below 55 C budget))

What the binary checked

land-pours

  • after: B.Cu 512.43; F.Cu 459.98
  • before: B.Cu 512.43; F.Cu 459.94
  • coverageAfter: B.Cu 91.51; F.Cu 82.14
  • failed: 0 item(s)
  • groups: 1 item(s)

Screenshots and drawings

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Clips

AI usage (Google Antigravity)

66 model calls: 195,444 fresh input, 12,412,488 cached input and 38,517 output tokens.