SparkFun Buck Regulator Breakout - 1.8V (AP3429A)
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The SparkFun 1.8V Buck Regulator Breakout features the AP3429A from Diodes Inc., a 2A step-down DC-DC converter with an input voltage range of 2.7V to 5.5V. This full-size, 1in. x 1in. version of our [buck regulator boards](https://www.sparkfun.com/categories/tags/buck-) is configured to provide a regulated 1.8V output, which is controlled by an `EN` *(enable)* pin. To dissipate excess heat, a 0.6in. x 0.5in. copper pad is provided to attach a heat sink to the bottom of the board.
As a full-size buck regulator breakout, additional options for connecting input and output power are available. There is a pre-assembled screw terminal for a non-permanent connection, the option to solder on a [barrel jack](https://www.sparkfun.com/products/119) for an [external power supply](https://www.sparkfun.com/categories/308), and five PTH pins to create a more permanent installation. Our full-size buck regulators also come with a red, power indication LED that light up when the power output is enabled. This board has four mounting holes compatible with [4-40 hardware](https://www.sparkfun.com/search/results?term=4-40).
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