2 layers40.1 × 40.1 mm
2 layers40.1 × 40.1 mm
STEPDOWN1A
mlab-modules/STEPDOWN01Step down power converter
- Size
- 40.1 × 40.1 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 38
- Nets
- 16
- Pads
- 110
- Tracks, vias
- 244, 49
- Pours
- 7
- Routed
- Yes
- KiCad
- KiCad 4
- Created
- 5 Dec 2020
- Updated
- 17 Sep 2023
Overview
STEPDOWN1A is an open-source printed circuit board by mlab-modules, from the mlab-modules/STEPDOWN01 repository on GitHub. It is a 2-layer board of 40.1 × 40.1 mm with 38 parts on 16 nets, routed with 244 tracks and 49 vias.
It is built around the L7987 and STPS3L60U. Its parts include 16 capacitors, 9 connectors, 8 resistors, 2 diodes and 2 inductors.
Main components
2Parts
38| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | CONN1_1 | Connect:WAGO256 | J1, J2, J3, J4 |
| 4 | _NC | Mounting_Holes:MountingHole_3.2mm_M3_DIN965_Pad | P1, P2, P3, P4 |
| 3 | 1u | Capacitors_SMD:C_0805 | C3, C4, C8 |
| 3 | 1u5 | Capacitors_SMD:C_1206 | C10, C13, C15 |
| 2 | 0R | Resistors_SMD:R_0805 | R1, R8 |
| 2 | 33u | Capacitors_Tantalum_SMD:TantalC_SizeC_EIA-6032_HandSoldering | C12, C14 |
| 1 | 100n | Capacitors_SMD:C_0805 | C6 |
| 1 | 150n | Capacitors_SMD:C_0805 | C5 |
| 1 | 15uH | Inductors:SELF-WE-PD-XXL | L1 |
| 1 | 16k9 | Resistors_SMD:R_0805 | R2 |
| 1 | 18k | Resistors_SMD:R_0805 | R4 |
| 1 | 240nH | Resistors_SMD:R_0805 | L2 |
| 1 | 33n | Capacitors_SMD:C_0805 | C9 |
| 1 | 33u | Capacitors_Tantalum_SMD:TantalC_SizeD_EIA-7343_HandSoldering | C1 |
| 1 | 390p | Capacitors_SMD:C_0805 | C7 |
| 1 | 3k3 | Resistors_SMD:R_0805 | R7 |
| 1 | 3u3 | Capacitors_SMD:C_0805 | C2 |
| 1 | 470p | Capacitors_SMD:C_0805 | C11 |
| 1 | 47u | Capacitors_ThroughHole:C_Radial_D6.3_L11.2_P2.5 | C16 |
| 1 | 620R | Resistors_SMD:R_0805 | R5 |
| 1 | 680R | Resistors_SMD:R_0805 | R6 |
| 1 | 750R | Resistors_SMD:R_0805 | R3 |
| 1 | CONN_01X02 | Pin_Headers:Pin_Header_Straight_1x02 | P5 |
| 1 | L7987 | Housings_SSOP:TSSOP-16-1EP-VIA_4.4x5mm_Pitch0.65mm | U1 |
| 1 | POWER OUT | LEDs:LED_0805 | D2 |
| 1 | STPS3L60 | Diodes_SMD:DO-214AB | D1 |
Questions
How big is the STEPDOWN1A PCB?
It measures 40.1 × 40.1 mm and has 2 copper layers, 1.6 mm thick.
What parts does the STEPDOWN1A use?
38 parts, built around the L7987 and STPS3L60U. 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 STEPDOWN1A KiCad files?
From the mlab-modules/STEPDOWN01 repository on GitHub, at the commit this page was made from: the board is STEPDOWN1A.kicad_pcb and its schematic STEPDOWN1A.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the STEPDOWN1A design in my own project?
Its repository states no licence, so its author keeps all rights: ask mlab-modules before reusing the design.
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