DC to DC Converter
[0004]

Module Properties: Non-Isolated Buck Non-Synchronous Rectification.
Input Voltage 4V-35V
Output Voltage 1.23 V -30V
Output Current 3A (max)
Conversion efficiency 92% (highest)
Switching frequency 150KHz
Output Ripple 30mV (max)
Load Regulation ± 0.5%
Voltage Regulation ± 2.5%
Operating Temperature -40°C to +85°C
External dimensions 48 * 23 * 14 (L * W * H) (mm)

Product Features:
1) Modules use high-quality domestic LM2596 chip, high efficiency (up to 92%), can easily bring up 3A (short) over current, long working conditions are recommended at 2.5A current. 
2) This module is adjustable step-down module, you can adjust the module above the sinking blue adjustable resistor to change the output voltage. Input and output pressure is 2V, the minimum can be output 1.23V voltage.
3) Modules indicated with IN-(negative input), IN + (positive input), OUT-(negative output), OUT + (positive output) must be connected correctly, otherwise it may cause damage to the module.
4) This module has no output short circuit protection,