KEHIPI DC 5V Power Converter 5pcs Mini Buck Regulator 4.5-20V to 5V 3A 10W Adjustable Fixed Output

Five-piece DC-to-DC buck regulator kit

This pack supplies five miniature step-down converters that accept 4.5 V to 20 V input and deliver a stable 5 V output at up to 3 A peak. Each board measures a fraction of a coin diameter, making it practical for tight enclosures or breadboard experiments. Hobbyists and engineers can power microcontrollers, sensors or USB devices from higher-voltage sources such as 12 V batteries or 9 V adapters. The adjustable version covers 1 V to 16 V if the default setting is changed.

10 W continuous rating with 97 % peak efficiency

Typical conversion exceeds 90 % when dropping 12 V to 5 V at 2 A, so heat remains modest in that common scenario. The regulator sustains 2 A indefinitely and handles brief 3 A peaks, but sustained loads above 2 A will exceed the 10 W thermal budget. Output short-circuit protection activates automatically, though the fault should be cleared promptly. The enable pin defaults to active-high, allowing simple on-off control with a logic signal.

Solder-jumper voltage selection and enable pin

Fixed-output voltages of 1.8 V, 2.5 V, 3.3 V, 5 V, 9 V and 12 V are selected by cutting the adjustment pad and bridging the desired jumper. This semi-permanent method suits production batches but prevents quick field changes. The board weighs 0.634 ounces and ships in black, with no headers fitted so users solder wires or pins to match their layout. Buyers needing plug-and-play barrel jacks or screw terminals must add them separately.