2 layers55.9 × 50 mm/LGS5145/KiCad/LGS5145%20Voltage%20Regulator.sync-conflict-20250314-135747-656VQ5O.kicad_pcb.jpg?size=s&soon)
2 layers55.9 × 50 mm
LGS5145 Voltage Regulator
R8bert/DC-DC-Regulators- Size
- 55.9 × 50 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 49
- Nets
- 9
- Pads
- 102
- Tracks, vias
- 18, 36
- Pours
- 36
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 5 Nov 2025
- Updated
- 14 Jan 2026
Overview
LGS5145 Voltage Regulator is an open-source printed circuit board by R8bert, from the R8bert/DC-DC-Regulators repository on GitHub. It is a 2-layer board of 55.9 × 50 mm with 49 parts on 9 nets, routed with 18 tracks and 36 vias.
It is built around the LGS5145, SS34 and FXL0420-4R7-M. Its parts include 15 resistors, 9 capacitors, 9 ICs, 9 diodes and 3 inductors. It belongs with the power boards of this library.
Main components
3
LGS5145
SOT-23-6-40℃~+105℃@(TJ) 1 1.2MHz 150uA 1A 4.5V~55V Adjustable Buck Buck Built-in No SOT-23-6 DC-DC Converters ROHSLegend-SiDC-DC Converters
SS34
SMA(DO-214AC)-55℃~+125℃ 3A 40V 500uA@40V 550mV@3A Independent SMA(DO-214AC) Schottky Diodes ROHSMDDSchottky Diodes
FXL0420-4R7-M
SMD,4.4x4.2mm105mΩ 2.8A 3A 4.7uH Molded inductor ±20% SMD,4.4x4.2mm Molding Power Inductors ROHScjiangPower Inductors
README
README.mdDC-DC-regulators
Parts
49| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | RF | easyeda2kicad:R0603 | R1, R1, R1, R3, R3, R3 |
| 6 | VIN LED | easyeda2kicad:LED0603-R-RD | LED1, LED1, LED1, LED2, LED2, LED2 |
| 4 | LOGO | LOGO | G***, G***, G***, G*** |
| 3 | 100nF/16V | easyeda2kicad:C0603 | C3, C3, C3 |
| 3 | 10uF/10V | easyeda2kicad:C0603 | C2, C2, C2 |
| 3 | 10uF/50V | easyeda2kicad:C0805 | C1, C1, C1 |
| 3 | 1K | easyeda2kicad:R0603 | R5, R5, R5 |
| 3 | 60K | easyeda2kicad:R0603 | R4, R4, R4 |
| 3 | INPUT | easyeda2kicad:CONN-TH_P5.00_KF301-5.0-2P | U2, U2, U2 |
| 3 | LGS5145 | easyeda2kicad:SOT-23-6_L2.9-W1.7-P0.95-LS2.8-BL | U1, U1, U1 |
| 3 | OUTPUT | easyeda2kicad:CONN-TH_P5.00_KF301-5.0-2P | U3, U3, U3 |
| 3 | RG | easyeda2kicad:R0603 | R2, R2, R2 |
| 3 | SS34 | easyeda2kicad:SMA_L4.3-W2.6-LS5.2-RD | D1, D1, D1 |
| 2 | 10uH | easyeda2kicad:IND-SMD_L7.0-W6.6_0630CDMCCDS | L1, L1 |
| 1 | FXL0420-4R7-M | easyeda2kicad:IND-SMD_L4.4-W4.2 | L1 |
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Questions
How big is the LGS5145 Voltage Regulator PCB?
It measures 55.9 × 50 mm and has 2 copper layers, 1.6 mm thick.
What parts does the LGS5145 Voltage Regulator use?
49 parts, built around the LGS5145, SS34 and FXL0420-4R7-M. 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 LGS5145 Voltage Regulator KiCad files?
From the R8bert/DC-DC-Regulators repository on GitHub, at the commit this page was made from: the board is Buck Converter (Step Down)/LGS5145/KiCad/LGS5145 Voltage Regulator.kicad_pcb and its schematic Buck Converter (Step Down)/LGS5145/KiCad/LGS5145 Voltage Regulator.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the LGS5145 Voltage Regulator design in my own project?
Its repository states no licence, so its author keeps all rights: ask R8bert before reusing the design.