This 12V to 4.2V DCDC Buck Converter Module accepts an input voltage from 8V to 36V and provides a regulated 4.2V output at up to 3A. It is a buck voltage power converter designed to step down higher voltage sources to a fixed 4.2V rail for 4.2V load applications. Key benefits Reliable stepdown: converts higher voltage sources (8V–36V) to a fixed 4.2V output with up to 3A maximum current, enabling a stable 4.2V rail for compatible devices. Wide input compatibility: flexible integration with automotive, industrial, solar, or lab power sources without the need for multiple regulators. Simplified integration: module form factor suitable for easy inclusion in projects and systems that require a dedicated 4.2V supply. Targeted for 4.2V loads: ideal when a precise 4.2V supply is needed for single cell Liion applications or other devices that operate at 4.2V. Key attributes Functionality: DCDC buck converter module with a fixed 4.2V output. Input range: 8V to 36V. Output: 4.2V at up to 3A. Type: Buck voltage power converter module. Applications and use cases Liion singlecell charging support: provide a fixed 4.2V rail from a higher voltage source to support charging or CVrelated loading for a 1S Liion cell. Vehicle and mobile electronics: power 4.2V devices from car or other 12V–36V systems, such as sensors, controllers, or small embedded modules that require a precise 4.2V supply. Lab and test setups: create a stable 4.2V reference or supply for testing 4.2V Liion cells and related circuitry from a configurable 8V–36V source. Notes This description reflects the product's stated specifications: input 8V–36V, output 4.2V, and maximum current of 3A, delivered via a DCDC buck converter module. No additional features beyond the described specifications are assumed.