4 layers120 × 120 mm
4 layers95 × 74 mm
PicoPSU
MECSEM/electricalAll the electrical designs for MECSEM.
- Size
- 95 × 74 mm
- Copper layers
- 4
- Thickness
- 1.61 mm
- Parts
- 129
- Nets
- 73
- Pads
- 634
- Tracks, vias
- 811, 319
- Pours
- 29
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 27 Apr 2026
- Updated
- 27 Apr 2026
Overview
PicoPSU is an open-source printed circuit board by MECSEM, from the MECSEM/electrical repository on GitHub, published under the GPL-3.0 licence. It is a 4-layer board of 95 × 74 mm with 129 parts on 73 nets, routed with 811 tracks and 319 vias.
It is built around the LM25141RGE, TPS3510D and 1N5819WS, with the B5817W, HL2310A and SS52F among its other parts. Its parts include 51 capacitors, 33 resistors, 11 diodes, 11 transistors and 6 inductors. It belongs with the RP2350 boards of this library.
Main components
9
LM25141RGE
VQFN-24-EP(4x4)-40℃~+125℃@(TA) 1 1.5V~15V 2.2MHz 3.8V~42V 35uA Adjustable Buck External Half-Bridge Yes VQFN-24-EP(4x4) DC-DC Converters ROHSTexas InstrumentsDC-DC Converters
TPS3510D
SOIC-8-40℃~+85℃@(TA) 200ms 3 3.3V、5V、12V 4V~15V Active Low Manual reset input Open-drain Voltage monitor SOIC-8 Supervisor and Reset ICs ROHSTexas InstrumentsSupervisor And Reset ICs
1N5819WS
SOD-3231 Independent 1A 25A 40V 500uA@40V 600mV@1A SOD-323 Schottky Diodes ROHSGuangdong HottechSchottky Diodes
B5817W
SOD-123-55℃~+150℃ 1A 1mA@20V 20V 450mV@1A Independent SOD-123 Schottky Diodes ROHShongjiachengSchottky Diodes
HL2310A
SOT-23MOSFETshongjiacheng
SS52F
SMAF-55℃~+125℃ 1 Independent 150A 1mA@20V 20V 550mV@5A 5A SMAF Schottky Diodes ROHS晶导微电子Schottky DiodesAO3400A
SOT-23-55℃~+150℃ 1 N-channel 1.45V 1.4W 30V 48mΩ@2.5V 5.7A 50pF 630pF 75pF 7nC@10V N-Channel SOT-23 MOSFETs ROHSAlpha & Omega SemiconductorMOSFETsHL2309
SOT-23MOSFETshongjiachengMM1W10
SOD-123Zener Diodeshongjiacheng
Parts
129| Qty | Value | Footprint | References |
|---|---|---|---|
| 18 | 10uF | Capacitor_SMD:C_1210_3225Metric | C5, C6, C17, C18, C20, C21, C23, C24, C32, C33, C35, C36, C38, C39, C47, C48 +2 |
| 8 | 330uF | FYDPLIB:CAP-SMD_BD8.0-L8.3-W8.3-LS9.0-FD | C1, C10, C19, C25, C34, C40, C49, C50 |
| 7 | BSC0501NSIATMA1 | FYDPLIB:TDSON-8-1 | Q2, Q8, Q9, Q10, Q11, Q12, Q13 |
| 6 | 10Ω | PCM_JLCPCB:R_0402 | R21, R22, R25, R26, R29, R30 |
| 4 | 10kΩ | PCM_JLCPCB:R_0402 | R2, R4, R10, R34 |
| 4 | 4.7kΩ | PCM_JLCPCB:R_0402 | R18, R19, R31, R32 |
| 4 | M3 | MountingHole:MountingHole_3.2mm_M3_Pad_Via | H1, H2, H3, H4 |
| 3 | 100nF | PCM_JLCPCB:C_0603 | C11, C26, C41 |
| 3 | 100nF | PCM_JLCPCB:C_0402 | C12, C27, C42 |
| 3 | 10nF | PCM_JLCPCB:C_0603 | C7, C22, C37 |
| 3 | 10nF | PCM_JLCPCB:C_0402 | C2, C3, C4 |
| 3 | 18kΩ | PCM_JLCPCB:R_0402 | R23, R27, R28 |
| 3 | 1N5819WS | PCM_JLCPCB:D_SOD-323 | D7, D8, D9 |
| 3 | 2.2uF | PCM_JLCPCB:C_0805 | C14, C29, C44 |
| 3 | 220nF | PCM_JLCPCB:C_0805 | C15, C30, C45 |
| 3 | 220nF | PCM_JLCPCB:C_0402 | C13, C28, C43 |
| 3 | 22nF | PCM_JLCPCB:C_0402 | C16, C31, C46 |
| 3 | 330nH | FYDPLIB:WE_Inductor_744308033 | L1, L3, L5 |
| 3 | 43kΩ | PCM_JLCPCB:R_0603 | R9, R20, R24 |
| 3 | 470nH | FYDPLIB:IND-SMD_L13.2-W12.9 | L2, L4, L6 |
| 3 | LM25141 | FYDPLIB:VQFN-24_L4.0-W4.0-P0.50-BL-EP2.5 | U2, U3, U4 |
| 3 | ~ | PCM_JLCPCB:Hole_Tooling_JLCPCB | H5, H6, H7 |
| 2 | 15kΩ | PCM_JLCPCB:R_0402 | R11, R15 |
| 2 | 2.2kΩ | PCM_JLCPCB:R_0402 | R7, R17 |
| 2 | 20kΩ | PCM_JLCPCB:R_0402 | R8, R14 |
| 2 | 220Ω | PCM_JLCPCB:R_0402 | R5, R6 |
| 2 | B5817W | PCM_JLCPCB:D_SOD-123 | D10, D11 |
| 2 | HL2310A | PCM_JLCPCB:Q_SOT-23 | Q15, Q17 |
| 2 | SS52F | PCM_JLCPCB:D_SMAF | D5, D6 |
| 1 | 10uF | Capacitor_SMD:C_1206_3216Metric | C78 |
| 1 | 1kΩ | PCM_JLCPCB:R_0402 | R3 |
| 1 | 24V IN | Connector_Molex:Molex_Micro-Fit_3.0_43045-1015_2x05_P3.00mm_Vertical | J1 |
| 1 | 3.9kΩ | PCM_JLCPCB:R_0402 | R13 |
| 1 | 300Ω | PCM_JLCPCB:R_0402 | R1 |
| 1 | 5.6kΩ | PCM_JLCPCB:R_0402 | R12 |
| 1 | 8.2kΩ | PCM_JLCPCB:R_0402 | R16 |
| 1 | AO3400A | PCM_JLCPCB:Q_SOT-23 | Q1 |
| 1 | ATX 4-PIN 12V PWR | Connector_Molex:Molex_Mini-Fit_Jr_5566-04A_2x02_P4.20mm_Vertical | J3 |
| 1 | ATX 8-PIN 12V PWR | Connector_Molex:Molex_Mini-Fit_Jr_5566-08A_2x04_P4.20mm_Vertical | J4 |
| 1 | ATX-24 | Connector_Molex:Molex_Mini-Fit_Jr_5566-24A_2x12_P4.20mm_Vertical | J2 |
| 1 | Green | PCM_JLCPCB:D_0805 | D2 |
| 1 | HL2309 | PCM_JLCPCB:Q_SOT-23 | Q16 |
| 1 | IO | Connector_PinHeader_2.54mm:PinHeader_2x03_P2.54mm_Vertical_SMD | J5 |
| 1 | MM1W10 | PCM_JLCPCB:D_SOD-123 | D4 |
| 1 | TPS3510 | Package_DIP:DIP-8_W7.62mm | U1 |
| 1 | White | PCM_JLCPCB:D_0805 | D3 |
| 1 | Yellow | PCM_JLCPCB:D_0805 | D1 |
| 1 | ~ | PCM_JLCPCB:Part_Num_JLCPCB | PN1 |
Questions
How big is the PicoPSU PCB?
It measures 95 × 74 mm and has 4 copper layers, 1.61 mm thick.
What parts does the PicoPSU use?
129 parts, built around the LM25141RGE, TPS3510D, 1N5819WS and B5817W. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the PicoPSU KiCad files?
From the MECSEM/electrical repository on GitHub, at the commit this page was made from: the board is PicoPSU/PicoPSU.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the PicoPSU design in my own project?
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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