DC-DC 6-24V to 5V 3A USB Step-Down Buck Module

Compact synchronous buck converter that steps a 6–24 V DC supply down to a regulated 5 V USB output at up to 3 A. It is a small, efficient way to charge a phone or run USB accessories from a 12 V or 24 V system, or from a 2S–5S LiPo pack in the field.

Key features

• Up to 97.5% conversion efficiency with a 500 kHz switching frequency, keeping heat losses low.
• 5.1–5.2 V output at up to 3 A through a USB port.
• Input reverse-polarity protection and output short-circuit protection.
• Red indicator shows when the output is live.
• 26.4 × 15 × 7.4 mm board with solder pads on the input, so it wires straight onto a power lead.

Specifications

• Input: 6–24 V DC
• Output: 5.1–5.2 V, up to 3 A, USB
• Efficiency: Up to 97.5%
• Switching frequency: 500 kHz
• Protection: Input reverse polarity, output short circuit
• Dimensions: 26.4 × 15 × 7.4 mm

On a LiPo, stay within 2S to 5S: a fully charged 6S pack sits at 25.2 V, above the 24 V input limit.