{"title":"SparkFun Buck Regulator Breakout - 3.3V (AP3429A)","handle":"sparkfun-buck-regulator-breakout-3-3v-ap3429a","url":"/products/sparkfun-buck-regulator-breakout-3-3v-ap3429a","description":"The SparkFun 3.3V 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 is configured to provide a regulated 3.3V output (from a 3.9 to 5.5V input voltage range), 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 for an external power supply, 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.Get Started with the SparkFun AP3429A Buck Regulator GuideFeatures:Buck Board:\n1in. x 1in. PCB layout\nThree power input/output options: \nPre-assembled 4-pin screw terminal\nFive 0.1in. spaced PTH pins\nFour plated slots for a DC barrel jack (input only)\n\n\n\nPower connections: \n\nVIN - Power In (3.9V to 5.5V)\n\nGND - Common Ground\n\nVOUT - Power Out (Regulated 3.3V)\n\nEN - Enable (Pull high to enable the power output)\n\n\nRed, power LED indicator\n0.5in. x 0.6in. Plated copper pad (for heat sinks)\n\nAP3429A:\nVIN: 2.7V to 5.5V\nVOUT: 0.6V to VIN\n2A Continuous Output Current\n90µA No-Load Quiescent Current\n1MHz Switching Frequency\nProtection Circuitry \nUndervoltage Lockout (UVLO)\nInput Overvoltage Protection\nOver Current Protection Cycle-by-Cycle Peak Current Limit\n\nThermal Shutdown (160°C/320°F)\n\n\nDocuments:\nSchematic\nEagle Files\nBoard Dimensions\nHookup Guide\n\nDatasheet (AP3429A) AP3428 Application Note\n\n\nManufacturer's Product Page (AP3429A) \nTechnical Documentation\nDiodes Technical Support Page\n\n\nGitHub Hardware Repo\n","vendor":"SparkFun","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":1639,"title":"Default Title","sku":"SF-COM-21337","price":12.78,"on_sale":false,"in_stock":true,"available_quantity":51,"option1":"Default Title"}]}