Kunkune

Step Down Adjustable or Fixed Buck Converter 4.5V-24V to 0.8-17V 1.8/2.5/3.3/5/9/12V

DC-DC Step Down Power Supply Module

Step Down Adjustable or Fixed Buck Converter 4.5V-24V to 0.8-17V - Main image
$1.29 $1.9 In stock

Category: DC to DC Converters

Step Down Adjustable or Fixed Buck Converter 4.5V-24V to 0.8-17V

Max output current 3A, long-running 2.1A
Efficiency 5V 0.7A is 97.5%, in 5V1A is 94%
Ultra-low quiescent current, quiescent current of 0.85 mA. Connected to the car battery without adding switches can be connected to the cigarette lighter line or the ACC power cable line.

Step Down Module parameters:
Module Properties: non-isolated step-down module (BUCK) synchronous rectifier
Input voltage: DC 4.5-24V

Output voltage can be:
– Adjustable (use potentiometer on the corner) 0.8-17V
– Fixed output (cut the line on the back of converter shown on last picture and solder output voltage needed)  -1.8V 2.5V 3.3V 5V 9V 12VSwitching Frequency: 500KHz
Output ripple: 20mV around (12V turn 5V3A) 20M-bandwidth

Operating temperature: Industrial grade (-40 C to + 85 C )
Output Overvoltage Protection: None
Full load temperature rise: 40 C
Static current: 0.85 mA
Load regulation: ± 1%
Voltage regulation: ± 0.5%
Dynamic response speed: 5% 200uS
Output short circuit protection: Do not short-circuit for a long time

Size: 20 x 11 x 5 mm

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Customer Reviews (4.4 / 5 · 5 reviews)

Leo ★★★★★

This little buck converter handles my project perfectly, I'm getting a solid 5V at just under 1 amp with barely any heat. The adjustable output range is really convenient for testing different voltages without swapping modules.

Eva ★★★★★

That near-zero quiescent current is the real deal — my battery-powered project barely sips power when idle now. Set it to 5V and it’s been rock solid at 1A with barely a warm spot on the board.

Riley M. ★★★★★

Measured the efficiency myself at 5V/1A and got right around 94%, just as claimed. The near-zero quiescent current is a real win for my battery-powered setup. Set it to 3.3V and it’s held rock steady since.