MP1584 Step Down Converter Buck Module (5V Fixed Output)

5V fixed output non-isolated DC buck voltage regulator, ultra small module 22x17x4mm
Great for devices that are designed to run on USB power.
Input: 4.5-28V, Output:5V, 3A Peak / 1.5A Sustained
Efficiency: Up to 92% (depends on the difference between input and output voltage) This module uses synchronous rectification, the most efficient power conversion available.
1.0MHz Switching Frequency, <30mV ripple (no load), MP1584 I