{"title":"AP3429A 3.3V Buck Converter Breakout - 3.3V Output 1.2A Max","handle":"ap3429a-3-3v-buck-converter-breakout-3-3v-output-1-2a-max","url":"/products/ap3429a-3-3v-buck-converter-breakout-3-3v-output-1-2a-max","description":"The AP3429A Buck Converter Breakout steps down 3.4–5.5V input to a stable 3.3V output at up to 1.2A, with 90–95% efficiency. It's ideal for powering 3.3V circuits from LiPo batteries, 3× alkaline cells, or USB power sources.\n\nDesigned to be pin-compatible with the LM1117-3.3V TO-220 regulator, you can swap it in for significantly better efficiency. An enable pin lets you shut down the output completely by pulling it low. Comes fully assembled and tested with header included for breadboard use.\n\nKey Features\n\n\n3.3V Regulated Output – Up to 1.2A load current\n\nWide Input Range – 3.4V to 5.5V (LiPo, 3× alkaline, USB)\n\nHigh Efficiency – 90–95% typical efficiency\n\n1MHz Fixed Frequency – Compact inductor and low noise\n\nEnable Pin – Tie low to shut down output completely\n\nLM1117-3.3V Pin Compatible – Drop-in replacement for TO-220 regulators\n\nBreadboard Ready – Header included for easy prototyping\n\n\nSpecifications\n\n\nIC: AP3429A\n\nInput Voltage: 3.4–5.5V\n\nOutput Voltage: 3.3V\n\nMax Output Current: 1.2A\n\nSwitching Frequency: 1MHz\n\nEfficiency: 90–95%\n\n\nIdeal For\n\nPortable projects powered by LiPo or alkaline batteries\nUSB-powered 3.3V circuits\nReplacing inefficient linear regulators like the LM1117\n\n\nPackage Contents\n\n1× AP3429A 3.3V buck converter breakout (assembled and tested)\n1× Header strip\n\n\nNeed a wider input range? Check out the MPM3610 3.3V Buck Converter Breakout with up to 21V input.","vendor":"Adafruit","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":3864,"title":"Default Title","sku":"AF-4711","price":8.09,"on_sale":false,"in_stock":true,"available_quantity":101,"option1":"Default Title"}]}