2 layers52.2 × 52.2 mm
Base promicro
google/mozc-devices
Circuit diagrams and firmware source code for Gboard DIY keyboards
30 parts3kApache-2.0
2 layers40.1 × 40.1 mm
STEPDOWN02
mlab-modules/STEPDOWN0228V input 1 MHz switching step-down converter
- Size
- 40.1 × 40.1 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 30
- Nets
- 12
- Pads
- 73
- Tracks, vias
- 103, 28
- Pours
- 6
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 5 Dec 2020
- Updated
- 16 Jul 2024
Overview
STEPDOWN02 is an open-source printed circuit board by mlab-modules, from the mlab-modules/STEPDOWN02 repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 40.1 × 40.1 mm with 30 parts on 12 nets, routed with 103 tracks and 28 vias.
It is built around the TPS54332DDA. Its parts include 12 capacitors, 9 connectors, 4 resistors, 2 diodes and 2 inductors. It belongs with the power boards of this library.
Main components
1README
README.mdSTEPDOWN02 - 1MHz switching down converter
This repository contains the design files, documentation, and usage instructions for the TPS54332 MLAB module. The TPS54332 is a high-efficiency synchronous buck converter capable of delivering up to 3 A of continuous output current. This development module is designed to integrate the TPS54332 into MLAB projects with ease.
Features
- Input Voltage Range: 3.5 V to 28 V
- Output Voltage Range: 0.8 V to 23 V
- Output Current: Up to 3 A
- Efficiency: Up to 95%
- Switching Frequency: Adjustable up to 2 MHz
- Integrated High-Side and Low-Side MOSFETs
- Cycle-by-Cycle Current Limit, Frequency Fold Back and Thermal Shutdown Protection
Getting Started
Prerequisites
To use this development module, you will need:
- A DC power supply (3.5 V to 28 V)
- Load device (up to 3 A)
- Multimeter or oscilloscope for measurements
- Soldering equipment (if customization of output voltage is needed)
Installation
- Connect the Power Supply: Connect the positive terminal of your DC power supply to the VIN pin and the negative terminal to the GND pin of the module.
- Connect the Load: Connect your load device between the VOUT pin and GND pin of the module.
Usage
- Adjust Output Voltage: The output voltage can be adjusted by selecting appropriate values for the feedback resistors (R1 and R2). Refer to the datasheet for the resistor calculation formula.
- Monitoring: Use a multimeter or oscilloscope to monitor the output voltage and current.
- Optimization: Fine-tune the switching frequency and compensation network as required for your application.
Documentation
- Datasheet: TPS54332 Datasheet
Parts
30| 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 |
| 2 | 1u5 | Capacitors_SMD:C_1206 | C9, C11 |
| 1 | 100n | Capacitors_SMD:C_0805 | C7 |
| 1 | 10k2 | Resistors_SMD:R_0805 | R2 |
| 1 | 18pF | Capacitors_SMD:C_0805 | C4 |
| 1 | 1k2 | Resistors_SMD:R_0805 | R4 |
| 1 | 1k93 | Resistors_SMD:R_0805 | R3 |
| 1 | 1u | Capacitors_SMD:C_0805 | C3 |
| 1 | 22u | Capacitors_Tantalum_SMD:TantalC_SizeB_EIA-3528_Reflow | C10 |
| 1 | 22u | Capacitors_Tantalum_SMD:TantalC_SizeD_EIA-7343_Reflow | C1 |
| 1 | 22u | Capacitors_Tantalum_SMD:TantalC_SizeC_EIA-6032_Reflow | C8 |
| 1 | 240nH | Resistors_SMD:R_0805 | L2 |
| 1 | 35k7 | Resistors_SMD:R_0805 | R1 |
| 1 | 3u3 | Capacitors_SMD:C_0805 | C2 |
| 1 | 4.7uH | Inductors_NEOSID:Inductor_XAL4030-472MEB | L1 |
| 1 | 47u | Capacitors_ThroughHole:C_Radial_D6.3_L11.2_P2.5 | C12 |
| 1 | 680pF | Capacitors_SMD:C_0805 | C5 |
| 1 | 8n2 | Capacitors_SMD:C_0805 | C6 |
| 1 | CONN_01X01 | Pin_Headers:Pin_Header_Straight_1x01 | P5 |
| 1 | D_Schottky | Diodes_SMD:DO-214AB | D1 |
| 1 | POWER OUT | LEDs:LED_0805 | D2 |
| 1 | TPS54332 | Housings_SOIC:8-PowerSOIC_Pitch1.27mm | U1 |
Questions
How big is the STEPDOWN02 PCB?
It measures 40.1 × 40.1 mm and has 2 copper layers, 1.6 mm thick.
What parts does the STEPDOWN02 use?
30 parts, built around the TPS54332DDA. 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 STEPDOWN02 KiCad files?
From the mlab-modules/STEPDOWN02 repository on GitHub, at the commit this page was made from: the board is hw/sch_pcb/STEPDOWN02.kicad_pcb and its schematic hw/sch_pcb/STEPDOWN02.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the STEPDOWN02 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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