Compact XL63020 / TPS63020 boostbuck power module for singlecell lithium batteries (4.2V) — automatic stepup/stepdown conversion with low output ripple, optimized for microcontroller and USBpowered projects. Why this module helps you Delivers a stable supply from a singlecell lithium battery (rated to 4.2V) or USB power by automatically stepping up or down as needed, so your microcontroller or electronics see consistent voltage without manual switching. Low ripple output reduces noisesensitive interference for sensors, analog circuits and RF modules. Easy to integrate into projects — designed for straightforward wiring and reliable operation so you can focus on development instead of power management. Key features and attributes Models: XL63020 implementation using TPS63020 architecture — recognized stepup/stepdown topology for reliable regulation. Functionality: Automatic boost and buck conversion to maintain stable output across input voltage variations. Compatibility: Designed for singlecell lithium battery systems (up to 4.2V nominal) and USB power sources; suitable to power microcontrollers, sensors, modules and small peripherals. Performance: Low output ripple for cleaner power delivery to noisesensitive electronics. Ease of use: Readytouse module form factor that simplifies connection and integration into existing projects. Form factor: Compact PCB module intended for embedded and prototyping applications. Practical use cases Portable microcontroller projects: Power Arduino, STM32, ESP32 and other development boards from a single Liion cell or USB source without worrying about undervoltage or overvoltage during discharge or charging. Batterypowered sensors and data loggers: Maintain steady supply voltage for sensors and ADCs to improve measurement stability and reduce noise in logged data. USBpowered portable devices: Provide consistent internal rail voltage for small USB devices and modules when the input source varies or when switching between battery and USB power. Simple integration tips Connect the lithium cell (singlecell, up to 4.2V) and/or USB power input according to the module pin labels; the module automatically regulates output. Verify output voltage and wiring before connecting sensitive components. Use short, solid ground and power traces for noise performance and to take advantage of the module's low ripple characteristics. What to expect A practical, compact power module based on the XL63020/TPS63020 boostbuck design that streamlines power management for small electronics and embedded systems, particularly where battery and USB sources are used interchangeably. Compatible applications include embedded prototyping, portable electronics, sensor nodes, lowpower communication modules and any project requiring stable, lownoise power from a singlecell Liion battery or USB source.