{"id":20587292,"url":"https://github.com/sparkfun/sparkfun_buck_regulator_ap3429a","last_synced_at":"2026-03-11T00:03:52.156Z","repository":{"id":191712402,"uuid":"574658624","full_name":"sparkfun/SparkFun_Buck_Regulator_AP3429A","owner":"sparkfun","description":"Top level repo for a suite of buck regulator form factors using the AP3429A buck 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alt=\"Issues\"\u003e\n    \u003cimg src=\"https://img.shields.io/github/issues/sparkfun/SparkFun_Buck_Regulator_AP3429A.svg\" /\u003e\u003c/a\u003e\n  \u003ca href=\"https://github.com/sparkfun/SparkFun_Buck_Regulator_AP3429A/actions\" alt=\"Actions\"\u003e\n    \u003cimg src=\"https://github.com/sparkfun/SparkFun_Buck_Regulator_AP3429A/actions/workflows/generate_documentation.yml/badge.svg\" /\u003e\u003c/a\u003e\n  \u003ca href=\"https://github.com/sparkfun/SparkFun_Buck_Regulator_AP3429A/blob/main/LICENSE.md\" alt=\"License\"\u003e\n    \u003cimg src=\"https://img.shields.io/badge/license-MIT-blue.svg\" /\u003e\u003c/a\u003e\n  \u003ca href=\"https://twitter.com/intent/follow?screen_name=sparkfun\"\u003e\n    \u003cimg src=\"https://img.shields.io/twitter/follow/sparkfun.svg?style=social\u0026logo=twitter\" alt=\"follow on Twitter\"\u003e\u003c/a\u003e\n\u003c/p\u003e\n\n| [3.3V Buck Regulator (COM-21337)](https://www.sparkfun.com/products/21337) | [1.8V Buck Regulator (COM-21338)](https://www.sparkfun.com/products/21338) |\n| --- | --- |\n| [![SparkFun Buck Regulator Breakout - 3.3V (AP3429A)](https://cdn.sparkfun.com/r/300-300/assets/parts/2/1/1/4/6/21337-_COM_SparkFun_Buck_Regulator_Breakout-_1.jpg)](https://www.sparkfun.com/products/21337) | [![SparkFun Buck Regulator Breakout - 1.8V (AP3429A)](https://cdn.sparkfun.com/r/300-300/assets/parts/2/1/1/4/7/21338-_COM_SparkFun_Buck_Regulator_Breakout-1.jpg)](https://www.sparkfun.com/products/21338) |\n\nThese buck regulator boards feature the AP3429A from [Diodes Inc.](https://www.diodes.com/), a 2A DC-DC buck converter with a wide input voltage range of 2.7V to 5.5V. The boards 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](https://www.sparkfun.com/products/119) for an [external power supply](https://www.sparkfun.com/categories/308). To dissipate excess heat, a copper pad is provided to attach a heat sink to the bottom of the board.\n\n*The primary differences between these boards are their regulated output voltage (**1.8V** and **3.3V**) and the configured UVLO (**2.7V** and **3.9V**, respectively).*\n\nRepository Contents\n-------------------\n\n* **[/docs](/docs/)** - Online documentation files\n    * [board_files](/docs/board_files/) - Files for the product design\n        * [Eagle design files](/docs/board_files/eagle_files.zip) (.zip)\n        * [Schematic](/docs/board_files/schematic.pdf) (.pdf)\n        * [Dimensions](/docs/board_files/dimensions.pdf) (.pdf)\n    * [component_documentation](/docs/component_documentation/) - Datasheets for hardware components\n    * [img/hookup_guide/](/docs/img/hookup_guide/) - Images for hookup guide documentation\n* **[/Hardware](/Hardware/)** - Eagle design files (.brd, .sch)\n\nDocumentation\n--------------\n* **[Hookup Guide (mkdocs)](http://docs.sparkfun.com/SparkFun_Buck_Regulator_AP3429A/)** - Hookup Guide for the AP3429A Buck Regulator Breakouts\n\nProduct Variants\n----------------\n* **AP63357** - 5V Buck Regulators\n    * COM-21255: [SparkFun Buck Regulator Breakout - 5V (AP63357DV)](https://www.sparkfun.com/products/21255)\n    * COM-21256: [SparkFun BabyBuck Regulator Breakout - 5V (AP63357DV)](https://www.sparkfun.com/products/21256)\n* **AP63203** - 3.3V Buck Regulators\n    * COM-18356: [SparkFun Buck Regulator Breakout - 3.3V (AP63203)](https://www.sparkfun.com/products/18356)\n    * COM-18357: [SparkFun BabyBuck Regulator Breakout - 3.3V (AP63203)](https://www.sparkfun.com/products/18357)\n* **AP3429A** - 3.3V \u0026 1.8V Buck Regulators\n    * COM-21337: [SparkFun Buck Regulator Breakout - 3.3V (AP3429A)](https://www.sparkfun.com/products/21337)\n    * COM-21338: [SparkFun Buck Regulator Breakout - 1.8V (AP3429A)](https://www.sparkfun.com/products/21338)\n\n\nVersion History\n---------------\n* [v01](https://github.com/sparkfun/SparkFun_Buck_Regulator_AP3429A/releases/tag/v01) - Initial Release\n\nLicense Information\n-------------------\n\nThis product is _**open source**_! \n\nPlease review the LICENSE.md file for license information. \n\nIf you have any questions or concerns about licensing, please contact technical support on our [SparkFun forums](https://forum.sparkfun.com/viewforum.php?f=152).\n\nDistributed as-is; no warranty is given.\n\n- Your friends at SparkFun.\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fsparkfun%2Fsparkfun_buck_regulator_ap3429a","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fsparkfun%2Fsparkfun_buck_regulator_ap3429a","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fsparkfun%2Fsparkfun_buck_regulator_ap3429a/lists"}