SparkFun Buck Regulator Breakout - 3.3V (AP3429A)
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Step a suitable input supply down to 3.3 volts with this AP3429A breakout. The standard-size board includes an enable input, screw-terminal connections and optional wiring footprints. A rear copper area supports attaching a heat sink, offering an integration option when the load and installation require additional thermal management.
Before you buy
Review load current, cooling and supply requirements; the converter IC’s wider limits do not replace the board’s configured input range.
SparkFun SKU: COM-21337 · Category: DC-DC power regulators
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Official product specifications and documentation
EAR summary based on supplier documentation; this is not a hands-on review. Product identity rechecked during the October 25, 2026 sprint. SparkFun Originals eligibility was verified with the supplier’s Original: Yes filter on 2026-10-25. Affiliate eligibility remains subject to SparkFun's program terms.