Adafruit LM3671 3.3V Buck Converter Breakout - 3.3V Output 600mA Max

Your power supply problems just got SUPER SOLVED! This 3.3V Buck Converter Breakout board is perfect for powering low voltage circuits from a single Li-Ion cell battery or USB power.This chip offers a 600-mA load current throughout the entire input voltage range of 3.5 to 5.5V. Ideal for portable projects, it is pin-compatible with the LM1117-3.3V TO-220 chip, allowing for seamless swaps and 90-95% efficiency!An ENABLE pin lets you tie it low to completely shut down the output. Experience a 2-MHz fixed-frequency in PWM mode, with PFM mode extending battery life by reducing current during light load or standby operations. Comes with a fully assembled and tested breakout board, plus headers for easy breadboard plugin.