MP1584 Datasheet here High EfficiencyStep down regulator BUCK Power Module. High Efficiency (upto 96%) as switching frequency is approx 1MHZ.
Power Supply for Breadboard - 3.3V-5V Output - DC In - USB Out - UK Free P&P
Power Supply for Breadboard - 3.3V-5V Output - DC In - Mini USB - UK Free P&P
5-30V to 3.3 5V Fixed Mini Buck Converter Step Down Module Power Supply -UK
5-30V to 3.3V 5V 9V 12V Fixed Mini Buck Converter Step Down Module Power Supply
Breadboard Power Supply Module PSU 12V, 5V, 3.3V - Dual Output
Pro LED Driver. 24v Output, 200w Output 8.33a. Waterproof Power Supply.
