Buck Converter Design Assistance

No changes applied.

0:04

68 days

Updated 7 connections

0:03

Connected U1:PH, D2:A, C7:P2, U4:1 to ^SW

Connected D2:C, C11:P2, R5:P2, C12:P2 to ^GND

Connected L1:P1, U1:PH, D2:A, C7:P2, U4:1 to ^SW 2

Connected L1:P2, C4:P1, C5:P1, C6:P1, R1:P1, U3:1 to ^VOUT_5V

Connected U1:SS, C11:P1 to ^SS

Connected R5:P1, C12:P1, U1:PH to ^SNUB_SW

Disconnected D2:A, U1:PH, C7:P2, U4:1, L1:P1, D2:C, L1:P2, C4:P1, C5:P1, C6:P1, R1:P1, U3:1

nets {

net GND = C2:P2, C8:P2, C11:P1, U1:SS, GND:GND, R2:P2, C9:P2, C1:P2, C5:P2, Q1:G, C3:P2, D1:A, U1:EP, R3:P2, C10:P2, C6:P2, U1:GND, C4:P2, D3:Cathode;

net FB = R1:P2, R2:P1, U1:VSENSE;

net VIN = C3:P1, R4:P2, U1:EN, C1:P1, U1:VIN, C2:P1;

net COMP = C9:P1, C8:P1, U1:COMP, R3:P1;

net BOOT = U1:BOOT, C7:P1;

net SW = U1:PH, C12:P1, R5:P1, L1:P1, U4:1, C7:P2, D2:A;

net GND = D2:C, C12:P2, R5:P2, C11:P2;

net VOUT_5V = L1:P2, U3:1, R1:P1, C6:P1, C5:P1, C4:P1;

}

68 days

Updated 2 connections

0:02

Connected D2:C, C11:P2, R5:P2, C12:P2 to ^GND

Disconnected D2:C, C11:P2, R5:P2, C12:P2

nets {

net GND = C2:P2, C8:P2, D2:A, C12:P1, C7:P2, R5:P1, L1:P1, U1:PH, U4:1, U1:SS, GND:GND, C6:P1, U3:1, R1:P1, C4:P1, L1:P2, C5:P1, R2:P2, C9:P2, C1:P2, C5:P2, Q1:G, C3:P2, D1:A, U1:EP, R3:P2, C10:P2, C6:P2, U1:GND, C4:P2, C11:P1, D3:Cathode;

net GND = D2:C, C12:P2, R5:P2, C11:P2;

}

68 days

Updated 4 connections

0:07

Connected U1:PH, D2:A, C7:P2, U4:1, R5:P1, C12:P1, L1:P1 to ^SW 2

Connected L1:P2, C4:P1, C5:P1, C6:P1, R1:P1, U3:1 to ^VOUT_5V 2

Connected U1:GND, U1:EP, C1:P2, C2:P2, C3:P2, C4:P2, C5:P2, C6:P2, C7:P2, C8:P2, C9:P2, C10:P2, C11:P2, C12:P2, D1:A, D2:C, D3:Cathode, Q1:G, R2:P2, R3:P2, R5:P2, U1:SS to ^GND 2

Disconnected D2:A, U1:PH, L1:P1, U4:1, C7:P2, R5:P1, C12:P1, C11:P1, U3:1, R1:P1, C4:P1, C5:P1, C6:P1, L1:P2

nets {

net GND = R5:P2, L1:P1, C12:P1, R5:P1, U4:1, C7:P2, D2:A, U1:PH, C8:P2, U1:SS, GND:GND, R2:P2, R3:P2, C9:P2, D1:A, C12:P2, C1:P2, C5:P2, Q1:G, C2:P2, C3:P2, U1:EP, C10:P2, C6:P2, C11:P2, D3:Cathode, D2:C, U1:GND, C4:P2;

net FB = R1:P2, R2:P1, U1:VSENSE;

net VIN = C3:P1, R4:P2, U1:EN, C1:P1, U1:VIN, C2:P1;

net COMP = C9:P1, C8:P1, U1:COMP, R3:P1;

net BOOT = U1:BOOT, C7:P1;

net VOUT_5V 2 = L1:P2, U3:1, R1:P1, C6:P1, C5:P1, C4:P1;

}

68 days

flux

0:00

Work done

Placed core converter and peripherals: U1, input protection (F1, Q1, D1), EMI filter (L2, C10, R4), power stage (L1, D2, C4, C5, C6), feedback (R1, R2), bootstrap (C7), compensation seed (R3, C8, C9), soft-start (C11), snubber placeholders (R5, C12), and testpoints (U2, U3, U4)
Wired major nets: VIN protection/EMI chain into U1, VOUT net to the output capacitors, and FB/COMP/BOOT/SS support nets

Success criteria review

❌ Not complete: ERC still flags Missing Power on U1, and the current netlist shows the SW node is incorrectly merged into GND ("GND" net currently includes U1 PH and D2 A), so the schematic is not yet functionally correct.

Next steps

I can finish this once the ground-net duplication/merge issue is resolved (the connection tool repeatedly collapses SW into GND when trying to unify grounds). If you want, I will: (1) delete the extra net portals, (2) rebuild nets using only explicit labels (VIN, SW, VOUT_5V, GND), then (3) re-run ERC until U1 power is clean.

68 days

Reviews

Ground
A common return path for electric current. Commonly known as ground.
jharwinbarrozo
20.5M
Net Portal
Wirelessly connects nets on schematic. Used to organize schematics and separate functional blocks. To wirelessly connect net portals, give them same designator. #portal
jharwinbarrozo
43.0M
Power Net Portal
Wirelessly connects power nets on schematic. Identical to the net portal, but with a power symbol. Used to organize schematics and separate functional blocks. To wirelessly connect power net portals, give them the same designator. #portal #power
jharwinbarrozo
11.4M
Generic Resistor
A generic fixed resistor ideal for rapid circuit topology development. Its footprint automatically adapts based on the selected package case code—supporting 0402, 0603, 0805, 1203, and many other standard SMD packages, as well as axial horizontal and vertical configurations. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard resistor values: 1.0 ohm, 10 ohm, 100 ohm, 1.0k ohm, 10k ohm, 100k ohm, 1.0M ohm 1.1 ohm, 11 ohm, 110 ohm, 1.1k ohm, 11k ohm, 110k ohm, 1.1M ohm 1.2 ohm, 12 ohm, 120 ohm, 1.2k ohm, 12k ohm, 120k ohm, 1.2M ohm 1.3 ohm, 13 ohm, 130 ohm, 1.3k ohm, 13k ohm, 130k ohm, 1.3M ohm 1.5 ohm, 15 ohm, 150 ohm, 1.5k ohm, 15k ohm, 150k ohm, 1.5M ohm 1.6 ohm, 16 ohm, 160 ohm, 1.6k ohm, 16k ohm, 160k ohm, 1.6M ohm 1.8 ohm, 18 ohm, 180 ohm, 1.8K ohm, 18k ohm, 180k ohm, 1.8M ohm 2.0 ohm, 20 ohm, 200 ohm, 2.0k ohm, 20k ohm, 200k ohm, 2.0M ohm 2.2 ohm, 22 ohm, 220 ohm, 2.2k ohm, 22k ohm, 220k ohm, 2.2M ohm 2.4 ohm, 24 ohm, 240 ohm, 2.4k ohm, 24k ohm, 240k ohm, 2.4M ohm 2.7 ohm, 27 ohm, 270 ohm, 2.7k ohm, 27k ohm, 270k ohm, 2.7M ohm 3.0 ohm, 30 ohm, 300 ohm, 3.0K ohm, 30K ohm, 300K ohm, 3.0M ohm 3.3 ohm, 33 ohm, 330 ohm, 3.3k ohm, 33k ohm, 330k ohm, 3.3M ohm 3.6 ohm, 36 ohm, 360 ohm, 3.6k ohm, 36k ohm, 360k ohm, 3.6M ohm 3.9 ohm, 39 ohm, 390 ohm, 3.9k ohm, 39k ohm, 390k ohm, 3.9M ohm 4.3 ohm, 43 ohm, 430 ohm, 4.3k ohm, 43K ohm, 430K ohm, 4.3M ohm 4.7 ohm, 47 ohm, 470 ohm, 4.7k ohm, 47k ohm, 470k ohm, 4.7M ohm 5.1 ohm, 51 ohm, 510 ohm, 5.1k ohm, 51k ohm, 510k ohm, 5.1M ohm 5.6 ohm, 56 ohm, 560 ohm, 5.6k ohm, 56k ohm, 560k ohm, 5.6M ohm 6.2 ohm, 62 ohm, 620 ohm, 6.2k ohm, 62K ohm, 620K ohm, 6.2M ohm 6.8 ohm, 68 ohm, 680 ohm, 6.8k ohm, 68k ohm, 680k ohm, 6.8M ohm 7.5 ohm, 75 ohm, 750 ohm, 7.5k ohm, 75k ohm, 750k ohm, 7.5M ohm 8.2 ohm, 82 ohm, 820 ohm, 8.2k ohm, 82k ohm, 820k ohm, 8.2M ohm 9.1 ohm, 91 ohm, 910 ohm, 9.1k ohm, 91k ohm, 910k ohm, 9.1M ohm #generics #CommonPartsLibrary
jharwinbarrozo
1.5M
Generic Capacitor
A generic fixed capacitor ideal for rapid circuit topology development. You can choose between polarized and non-polarized types, its symbol and the footprint will automatically adapt based on your selection. Supported options include standard SMD sizes for ceramic capacitors (e.g., 0402, 0603, 0805), SMD sizes for aluminum electrolytic capacitors, and through-hole footprints for polarized capacitors. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard capacitor values: 1.0pF, 10pF, 100pF, 1000pF, 0.01uF, 0.1uF, 1.0uF, 10uF, 100uF, 1000uF, 10000uF 1.1pF, 11pF, 110pF, 1100pF 1.2pF, 12pF, 120pF, 1200pF 1.3pF, 13pF, 130pF, 1300pF 1.5pF, 15pF, 150pF, 1500pF, 0.015uF, 0.15uF, 1.5uF, 15uF, 150uF, 1500uF 1.6pF, 16pF, 160pF, 1600pF 1.8pF, 18pF, 180pF, 1800pF 2.0pF, 20pF, 200pF, 2000pF 2.2pF, 22pF, 220pF, 2200pF, 0.022uF, 0.22uF, 2.2uF, 22uF, 220uF, 2200uF 2.4pF, 24pF, 240pF, 2400pF 2.7pF, 27pF, 270pF, 2700pF 3.0pF, 30pF, 300pF, 3000pF 3.3pF, 33pF, 330pF, 3300pF, 0.033uF, 0.33uF, 3.3uF, 33uF, 330uF, 3300uF 3.6pF, 36pF, 360pF, 3600pF 3.9pF, 39pF, 390pF, 3900pF 4.3pF, 43pF, 430pF, 4300pF 4.7pF, 47pF, 470pF, 4700pF, 0.047uF, 0.47uF, 4.7uF, 47uF, 470uF, 4700uF 5.1pF, 51pF, 510pF, 5100pF 5.6pF, 56pF, 560pF, 5600pF 6.2pF, 62pF, 620pF, 6200pF 6.8pF, 68pF, 680pF, 6800pF, 0.068uF, 0.68uF, 6.8uF, 68uF, 680uF, 6800uF 7.5pF, 75pF, 750pF, 7500pF 8.2pF, 82pF, 820pF, 8200pF 9.1pF, 91pF, 910pF, 9100pF #generics #CommonPartsLibrary
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Generic Inductor
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jharwinbarrozo
15.8k
Terminal
An electrical connector acting as reusable interface to a conductor and creating a point where external circuits can be connected.
natarius
RMCF0805JT47K0
47 kOhms ±5% 0.125W, 1/8W Chip Resistor 0805 (2012 Metric) Automotive AEC-Q200 Thick Film #forLedBlink
jharwinbarrozo
1.2M
875105359001
10uF Capacitor Aluminum Polymer 20% 16V SMD 5x5.3mm #forLedBlink #commonpartslibrary #capacitor #aluminumpolymer #radialcan
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CTL1206FYW1T
Yellow 595nm LED Indication - Discrete 1.7V 1206 (3216 Metric) #forLedBlink
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Properties

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