Buck Regulator Hookup Guide

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Contributors: Alex the Giant, Ell C
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Introduction

Who doesn't occasionally need power regulation? We certainly do, so we've designed the SparkFun Buck Regulator Breakout and the SparkFun BabyBuck Regulator Breakout to help us with just such a task.

Starring the AP63203 from Diodes Inc, both breakout boards take advantage of the 2A synchronous buck converter that has a wide input voltage range of 3.8V to 32V and fully integrated 125mΩ high-side power MOSFET/68mΩ lowside power MOSFET to provide high-efficiency step-down DC/DC conversion. All of this snuggled up in a a low-profile, TSOT26 package that's integrated into either a 1x1" or 0.4x0.5" board. For a wide variety of power management needs - grab yourself a Buck Regulator or Baby Buck Regulator and let's dive in!

SparkFun Buck Regulator Breakout - 3.3V (AP63203)

SparkFun Buck Regulator Breakout - 3.3V (AP63203)

COM-18356
$5.50
SparkFun BabyBuck Regulator Breakout - 3.3V (AP63203)

SparkFun BabyBuck Regulator Breakout - 3.3V (AP63203)

COM-18357
$4.50
3

Required Materials

To follow along with this tutorial, you will need the following materials. You may not need everything though depending on what you have. Add it to your cart, read through the guide, and adjust the cart as necessary.

Tools

You will need a soldering iron, solder, and general soldering accessories.

Soldering Iron - 60W (Adjustable Temperature)

Soldering Iron - 60W (Adjustable Temperature)

TOL-14456
$16.50
16
Solder Lead Free - 15-gram Tube

Solder Lead Free - 15-gram Tube

TOL-09163
$3.95
4

Suggested Reading

If you aren’t familiar with the following concepts, we recommend checking out these tutorials before continuing.

How to Solder: Through-Hole Soldering

This tutorial covers everything you need to know about through-hole soldering.

Logic Levels

Learn the difference between 3.3V and 5V devices and logic levels.

Electric Power

An overview of electric power, the rate of energy transfer. We'll talk definition of power, watts, equations, and power ratings. 1.21 gigawatts of tutorial fun!