This module is a typical stepup/down (buckboost) regulator with an input voltage range of 1.85.5V, suitable for powering STM32, ESP32, 51 microcontrollers and other models. It includes a red LED output indicator and supports powersaving modes to extend the battery life of connected devices. Color: Black Key features Regulator type: Stepup/down (buckboost) provide flexibility for varying input voltages Input range: 1.85.5V, enabling use with a wide range of battery and supply sources Regulator: TI TPS63020 voltage lifting program, offering low output ripple and stable performance Switching frequency: Up to 2.4 MHz Output current: Typically up to 900 mA in most cases Output indicator: Red LED indicator to show output activity Modes: Two userselectable modes — normal operation mode and power saving mode Material/color: Black housing Performance and compatibility The module is designed to power microcontroller platforms such as STM32, ESP32, and 51 series, among others, from lowvoltage sources Low ripple output supports stable operation of sensitive electronics switching frequency improves transient response and reduces size of input/output capacitors Two operating modes allow balancing performance and energy efficiency for batterypowered applications Use scenarios Portable sensor nodes and wearables: Backup power from Liion or other batteries with a broad input range, providing stable operation to MCUbased sensing and communication tasks while enabling a powersaving mode to extend battery life Development and prototyping: Power lowvoltage development boards (STM32, ESP32, 51 microcontrollers) from singlecell or multicell packs, with a visual red LED indicator for quick status checks Embedded devices in remote or field deployments: Maintain reliable operation under varying supply conditions, using the normal mode for performance and switching to powersaving mode to conserve energy when full performance is not required This description preserves the original model and function details while presenting clear, customerfriendly information on benefits, compatibility, specifications, and practical applications.