This listing includes 2 pieces of LM2576R3.3 in a TO2635 surfacemount package. The LM2576R3.3 is a fixed 3.3volt output buck switching regulator designed for efficient conversion of higher DC voltages to a stable 3.3 V rail. Each device is in the TO2635 package, suitable for compact PCB layouts. Key benefits Provides a stable 3.3 V output with up to 3 A load current when used with proper external components. efficiency buck regulator reduces heat compared with linear regulators, improving battery life and board reliability. Compact TO2635 surfacemount package enables small, dense PCB designs. Fixed 3.3 V output simplifies circuit design by removing external feedback resistor networks. Key attributes Functionality: Stepdown buck regulator with fixed 3.3 V output (LM2576R3.3). Compatibility: Designed for standard external components per datasheet (inductor, catch diode, input and output capacitors) and fits a TO2635 footprint. Size: TO2635 fivepin surfacemount package. Material: Plastic/epoxy molded SMD package (TO2635). Performance: 3 A maximum output current; fixed 3.3 V output; switching frequency around 52 kHz; input voltage range up to 40 V. Applications and use cases Converting a higher voltage rail (12 V or 9 V) to a 3.3 V supply for microcontrollers and logic circuits in embedded projects. Powering 3.3 V rails on compact consumer electronics from a higher voltage source, enabling efficient board design. Supplying 3.3 V logic in robotics or automation boards from a 5 V or higher main supply, with improved efficiency and reduced heat. Usage notes For proper operation, use appropriate external components as specified in the datasheet, including the inductor, Schottky diode, input capacitor, and output capacitor. Ensure adequate heatsinking and follow recommended PCB layout practices to achieve stable performance and good efficiency.