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Getting Started

Note

The SparkFun Buck Regulator Breakout - 3.3V (AP3429A) and 1.8V (AP3429A) have similar features to our previous buck regulators (AP63203 & AP63357).

Introduction

These boards feature the AP3429A from Diodes Inc., a 2A step-down DC-DC converter with an input voltage range of 2.7V to 5.5V. They are configured to provide a regulated 3.3V or 1.8V output, which is controlled by an EN (enable) pin and indicated by a red power LED. A pre-assembled screw terminal and 0.1" spaced PTH pins are available to connect the input and output power of the boards. Additionally, there is the option to solder on a barrel jack for an external power supply. To dissipate excess heat, a 0.5" x 0.6" copper pad is provided to attach a heat sink to the bottom of the board.

 Required Materials

To get started, users will need a few items. Now some users may already have a few of these items, feel free to modify your cart accordingly.

Jumper Modification

New to jumper pads?

Check out our Jumper Pads and PCB Traces Tutorial for a quick introduction!

How to Work with Jumper Pads and PCB Traces
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To modify the jumper, users will need soldering equipment and/or a hobby knife.

Battery Options

If users would like to power their board with a battery, we recommend the following options from our catalog.

 Suggested Reading

Below, are a few tutorials that may help users familiarize themselves with various aspects of this product: