12 V to 5 V / 1 A Buck Molecule (TPS54202)

@@ -1,6 +1,6 @@ # AI Flow run: claude-opus-5.5 on board-0 -**Running**: step `routing`, 153.0 min of AI time since the prompt (654.0 min on the wall clock). This page updates at every step change.+**Running**: step `pours`, 176.8 min of AI time since the prompt (677.9 min on the wall clock). This page updates at every step change.  Prompt at 2026-09-29T00:39:00Z (UTC). Flow: board. Every number here is from the run's append-only ledger (run.jsonl). AI time is the time the AI was working on a prompt: from the human's prompt to the AI's done, with any gap over 15 min where no command ran (unobserved, not proven idle) cut out. @@ -10,8 +10,8 @@ One row per human prompt: the AI's time on it, unobserved gaps excluded by the h  | Session | Prompt at | Done at | AI time min | Unobserved gap min | What | |---|---|---|---|---|---|-| 1 | 2026-09-29T00:39:00Z | (open) | 153.0 | 501 | the first prompt |-| **all** | | | **153.0** | | |+| 1 | 2026-09-29T00:39:00Z | (open) | 176.8 | 501 | the first prompt |+| **all** | | | **176.8** | | |  ## Per step @@ -21,18 +21,20 @@ AI time only, the idle cut out. |---|---|---|---|---|---|---|---| | intake | 92.9 | 91.9 | 1.0 | 4 | 1 | 0 | 90.9 min | | placement | 14.9 | 4.3 | 10.6 | 11 | 1 | 0 | 2.3 min |-| routing | 19.5 | 0.0 | 19.5 | 2 | 1 | 1 | 0.0 min |-| pours | 3.3 | 0.0 | 3.3 | 11 | 1 | 0 | 0.0 min |+| routing | 43.4 | 0.0 | 43.4 | 4 | 1 | 1 | 0.0 min |+| pours | 3.3 | 0.0 | 3.3 | 13 | 2 | 1 | 0.0 min | | current | 0.0 | 0.0 | 0.0 | 1 | 0 | 0 | 0.0 min | | components | 4.5 | 4.4 | 0.1 | 2 | 1 | 0 | 4.4 min | | libraries | 11.4 | 8.6 | 2.9 | 1 | 1 | 0 | 8.6 min | | models | 6.3 | 5.4 | 0.9 | 3 | 1 | 0 | 5.4 min | | other | 0.0 | 0.0 | 0.0 | 1 | 0 | 0 | 0.0 min |-| **total** | **153.0** | **114.6** | **38.4** | | | | |+| **total** | **176.8** | **114.6** | **62.2** | | | | |  ## Returns to earlier steps  - 2026-09-29T11:32:58Z back to **routing** (visit 1): Fields: the VOUT Kelvin sense runs 10 mm on B.Cu under the input caps (y=86.4), slicing the GND plane under the hot loop; re-route it along the top edge+- 2026-09-29T11:55:27Z back to **pours** (visit 2): Fields: SW neck 215 A/mm2 at U1.2; U1 +51 C still air because Kelvin keepouts fenced U1.1 off the GND pour and there were no thermal vias; add an SW patch, solid GND and thermal vias at U1.1, keepouts on the sense layer only+- 2026-09-29T11:56:48Z back to **pours** (visit 2): Fields: SW neck 215 A/mm2 at U1.2; U1 +51 C still air (Kelvin keepouts fenced U1.1 off the GND pour, no thermal vias); add SW patch, solid GND + thermal vias at U1.1, keepouts on the sense layer only  ## Decisions along the way @@ -41,6 +43,7 @@ AI time only, the idle cut out. - 2026-09-29T02:57:45Z clip-start:pours-1 - 2026-09-29T11:31:59Z clip guard: the pours clip ran 514 min, past its 15 min budget twice over; stopped by the guard - 2026-09-29T11:33:00Z clip-start:routing-1+- 2026-09-29T11:56:50Z clip-start:pours-2  ## Where the board stands @@ -99,16 +102,28 @@ Why the AI came back here: Fields: the VOUT Kelvin sense runs 10 mm on B.Cu unde  ![the board when routing began](/blob/app/buck-12v5v-molecule/docs/runs/buck-12v5v-molecule-claude-opus-5-5-20260929-0039/shot-routing-1-start.png) +### pours, visit 2 (rework)++What this step does: pour every net the spec names, keepouts along Kelvin taps, thermal and stitching vias, land, measure the copper kept++Why the AI came back here: Fields: SW neck 215 A/mm2 at U1.2; U1 +51 C still air (Kelvin keepouts fenced U1.1 off the GND pour, no thermal vias); add SW patch, solid GND + thermal vias at U1.1, keepouts on the sense layer only++**Clip: pours, visit 2 (rework), still recording (started 2026-09-29T11:56:50Z); it appears here when the step ends.**++**Screenshot: the board when pours, visit 2 (rework) began.**++![the board when pours, visit 2 (rework) began](/blob/app/buck-12v5v-molecule/docs/runs/buck-12v5v-molecule-claude-opus-5-5-20260929-0039/shot-pours-2-start.png)+ ## Plan usage, the second cost line  Percent of each plan limit used, as the provider reports it, at the start of the run and at its end.  | Provider | Limit | At start | At end | Used by this run | |---|---|---|---|---|-| claude | 5h | 4 % | 2 % | -2.0 % |+| claude | 5h | 4 % | 3 % | -1.0 % | | claude | Fable | 0 % | 0 % | 0.0 % | | claude | week | 7 % | 9 % | 2.0 % |-| codex | week | 2 % | 3 % | 1.0 % |+| codex | week | 2 % | 4 % | 2.0 % |  *The limits are per account, not per run: every AI thread signed in as this user draws on the same numbers, so a run made while other threads were working shows their usage too. Read it as an upper bound unless this run was the only thread active.*