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Power ≈9 W·Blocks 3·Nets 4·Top rail 60%

⎓Power EntrydiscPWR1

vin 9–18 V · iout_max 2 A●OK

●voutout

●gndout

⇄Buck ConverterICREG1

9–18 V → 5 V · 3 A●OK

●vinin

●gnd_inin

●voutout

●gnd_outout

⊞MCU + LoadICLOAD1

vdd 5 V · i_typ 1.8 A▲1 warning

●vddin

●gndin

●statusout

nets 4parts 13power ≈9 Wtop rail 60%

Structural checks (typed nets · budgets), not a simulation — a clean result means sane, not validated. what this catches →

Power budget · ≈9 W

vout · 18 V1.18 / 2 A

21.24 W · 0.82 A spare

vout#2 · 5 V1.8 / 3 A

9 W · 1.2 A spare

↳ REG1 draws ~1.18 A from 9 V (10.59 W in)

Checks · 3

▲ LOAD1.status (signal) isn't wired to anything yet.

about this check ↗

💡 This looks like your main power-entry rail. Add a test point on both vout and ground — if the board ever won't power up, the fastest first thing to rule out is whether it's getting ample power.

about this check ↗

ℹ DC solve treated REG1/U1, LOAD1/U1, PWR1/J1, PWR1/Q1, PWR1/D1 as open (semiconductors/ICs aren't linear) — bias networks around them solve correctly; paths through them don't.

BOM · 13

The one-click cart needs an exact part number per line, which none of these declare yet — but every row’s buy ↗ opens a Digi-Key search that works. Declare a part number on a block’s part to enable the cart.

1× barrel-2.1mm PWR1/J1buy ↗

1× p-fet PWR1/Q1buy ↗

1× tvs PWR1/D1buy ↗

1× 100uFpol PWR1/C1buy ↗

1× buck-controller REG1/U1buy ↗

1× 10uH REG1/L1buy ↗

1× 22uF REG1/Cinbuy ↗

1× 47uF REG1/Coutbuy ↗

1× 39k REG1/R1buy ↗

1× 10k REG1/R2buy ↗

1× mcu LOAD1/U1buy ↗

1× 100nF LOAD1/C1buy ↗

1× 10uF LOAD1/C2buy ↗

Electrace may earn a commission on parts ordered through these links, at no extra cost to you. Links never influence which parts a block recommends.

Part values

Resistors: 2 distinct values across 2 parts

39k10k

Capacitors: 5 distinct values across 5 parts

100uF22uF47uF100nF10uF

Inductors: 1 distinct value across 1 parts

10uH

Fewer distinct values = fewer reels and stocking mistakes. Consolidate where a block's declared envelope allows.

Stress test

Input what-ifV

At 24 V, REG1's vin max (18 V) is the first to go — REG1.vin accepts max 18 V and sits directly on the input-tracking rail vout.

REG1 · vin max18V · over

REG1 · vin.max20V · over

PWR1 · vin.max30V · +6

Checks every declared input limit on input-tracking rails, plus authored limit notes — not a simulation. A guided tour of how the design dies.