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I preserved your manually adjusted J4 and LED placement and stopped the earlier correction passes that could overwrite them. A replacement pass was dispatched to handle only the remaining U1 support, C4/U5, USB support, buck-stage, pump-stage, and antenna-keepout work.

I could not inspect or reconcile that executor’s completed changes, so their exact state is unverified. Before routing, the live board still needs a read-only check confirming:

J4 and all LEDs remained unchanged.
U1, C1, and R2 clear the center-hole and antenna regions.
C4 is properly oriented beside U5.
U6/R9/R10/U7 are suitably arranged behind J4.
U3/L1/C18–C22/R11/R12 and Q1/D2/R7/R8 are compact and clear.
The antenna copper keepout exists across all copper layers.
No new overlaps, bounds errors, or center-hole violations were introduced.

Execution stopped because your ACUs ran out.

Check placement status

Review DRC issues

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Schematic

Layout

3D View

Power Budget

Design Cases

Table

Rail / load	Normal estimate	Design peak	Notes
5 V: 24 SK6812RGBW-WS	firmware <=0.50 A	1.90 A	User-specified full-white hardware worst case; LED firmware cap is mandatory.
5 V: AHCT buffer + USB/auxiliary	0.01 A	0.02 A	Buffer is negligible; allow margin.
3.3 V: ESP32-C3 module	0.10 A	0.35 A	Wi-Fi/BLE bursts; design allowance.
3.3 V: TCAN334	0.01 A	0.02 A	CAN transmit allowance.
3.3 V: NAU7802 + I2C pullups	0.01 A	0.02 A	Pending actual NAU7802 library placement.
3.3 V: button/logic margin	0.01 A	0.03 A	Margin.
12 V: pump	0.60 A	2.00 A transient	Direct 12 V branch; flyback protected.

Rail Totals and Regulator Sizing

5 V continuous/full-white worst case: 1.92 A. The TPS54302 is a 3 A buck, giving 1.56× current margin over the 1.92 A peak.
3.3 V peak allowance: 0.42 A (1.39 W). The LMR33630 is a 3 A buck; it is selected rather than an LDO. A 5 V-to-3.3 V LDO at 0.42 A would dissipate approximately 0.71 W and is unsuitable in a small package without a dedicated thermal design.
12 V active peak: Pump 2.00 A transient plus 5 V conversion input about 0.94 A at 85% efficiency plus 3.3 V conversion reflected inside 5 V. Budgeted source transient is about 3.0 A before protection/connector derating. Steady full-white with 0.6 A pump is about 1.55 A from 12 V at 85% buck efficiency.

Buck Component Basis

TPS54302 12-to-5 V reference circuit: 10 uH inductor, two 22 uF output capacitors, 10 uF input ceramic, 100 kΩ / 13.3 kΩ feedback divider, 75 pF feedforward, and 100 nF BOOT-to-SW. The design will use an inductor with saturation-current margin above the calculated ~3.5 A switch peak and capacitors voltage-rated above the TVS clamp on the input.
LMR33630 5-to-3.3 V reference basis: 2.2 uH at 1.4 MHz variant, two 22 uF output capacitors, 10 uF + 220 nF input capacitors, 100 kΩ / 43.2 kΩ feedback divider, 100 nF BOOT-to-SW, 1 uF VCC.

Input Protection and Source Caveat

A 2 A-hold PTC is only provisional and must be checked against ambient derating and the 3 A transient. The pump’s 2 A inrush is short, but a one-shot fuse / branch protection decision requires actual surge-duration data.
TVS working standoff is 14 V (SMBJ14A), nominal clamp about 23.2 V. Every input capacitor, buck VIN pin, MOSFET, diode, and terminal must withstand the clamp with margin.
USB-C sink current depends on host/source CC advertisement and cable capability. The 1.5 A LM66100 ideal-diode path is explicitly a service/low-load option and must not be used to demand the 1.9 A LED full-white load.

Required Firmware Constraint

Keep aggregate LED current at <=0.5 A under normal firmware operation. Hardware power components remain sized for 1.9 A full-white LED worst case plus margin.

Design Cases
Rail Totals and Regulator Sizing
Buck Component Basis
Input Protection and Source Caveat
Required Firmware Constraint