Buck Converter LM2596S DC-DC 24V 12V to 5V 2A


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Digital read – Hobbyist grade buck converters +/-20% acceptance.

These digital display buck converters are ideal for hobbyists looking to take on electronic projects with their 3D printers.




Model: LM2596S DC-DC step-down module

Input voltage: 3.2V~46V (input maximum 40V, input minimum1.5V)

Output voltage: 1.25V~35V

Output current: 3A (not exceeding)

Conversion efficiency: 92% (not exceeding)

Output ripple: <30mV

Switching frequency: 65KHz

Working temperature: -45℃~ +85℃

Size: 43mm x 21mm x 14mm

Extra heat dissipation needed over 15W



This module can be applied to the fields in the input voltage is higher than the step-down output voltage, such as batteries, power transformers, DIY adjustable power supply, buck electrical equipment industry 24V car, 12V 3.3V switch, 12V 5V switch, 24V 5V switch, 24V 12V switch, 36V 24V Tower and so on.


Product size: 66mm*36mm*14mm(LxWxH)

Colors: Blue Package Weight: 23g/pcs Materials: FR4+ Electronic Components

Name: LM2596ADJ DC-DC Step-Down Power Supply Module (Adjustable Step-Down with Digital Display S

With a voltmeter and the voltmeter displays self-calibration. Uses more advanced microprocessor voltage voltmeter error ±0.05V, range 0~40V. (To ensure the accuracy of the voltmeter, make sure the input voltage is 4.5V and above)

· Press a button to change input or output voltage measurements and displays light that measures voltages, and saves settings, even power off then on.

· Input voltage 4.5~40V. (Input voltage must be higher than output voltage by 1.5v or more)

1.25V ~ 37V adjustable output voltage range continuously adjustable. (Input voltage must be greater than output voltage by 1.5V)

3A output current max, recommendations within 2.0A use, high current needs improved heat dissipation.

· Output power 20W, 15W, please improve heat dissipation.

High conversion efficiency, average 88% (efficiency and input and output voltage, current, related pressure)

· With reverse polarity protection, reverse polarity will not burn




The built-in voltage table shows the output voltage, long press the right button for 2 seconds after the release, the voltmeter and the “OUT” output voltage indicator flash synchronously, this time in a setting mode of the output voltage; Similarly, the voltmeter indicates when the input voltage, Long press the right button 2 seconds after the release, the voltmeter and an input voltage indicator “IN” flashing synchronously, then enter the setting mode of the input voltage;

Touch the right side of the button, the voltage increases by one unit, touch the left button, voltage reduction unit; Because the voltage is less than the value of a unit of 0.1V, so you need to press 1-5 times in a row to see the voltmeter change of 0.1V, Continuous concrete button several times according to the voltage value currently displayed, the current display the higher the voltage, the less pressure;

· When the voltage is set, long press the right button for 2 seconds after the release, then you can exit the voltage calibration mode, all the parameters set to automatically shut down to save.

Note : In this way, you only need to adjust the calibration once to get accurate voltage values ​​over the entire voltage range, this function is designed to meet your requirements and design higher accuracy, ease of operation. ‘use.



1. When the module output voltage cannot be adjusted, the output voltage is always equal to the input voltage. Please adjust the potentiometer counterclockwise to 20 turns or more. (Leave the potentiometer against your chest, turn counterclockwise boost).

2. The input voltage must be higher than the output voltage by 1.5v or more

3. For high current or high power you will need to improve heat dissipation

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