mlab mlab-module step-down voltage-regulator


28V input 1 MHz switching step-down converter


This is an open-source hardware design, one of the modules from the MLAB labolatory system.

STEPDOWN02 - 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.

STEPDOWN02 top view

STEPDOWN02 bottom veiw


  • 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


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)


  1. 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.
  2. Connect the Load: Connect your load device between the VOUT pin and GND pin of the module.


  1. 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.
  2. Monitoring: Use a multimeter or oscilloscope to monitor the output voltage and current.
  3. Optimization: Fine-tune the switching frequency and compensation network as required for your application.