LM2596S DC-DC Step-Down 3-40V 3A Buck Converter - Step-Down Voltage

LM2596S DC-DC Step-Down 3-40V 3A Buck Converter LM2596S Step-Down supports input voltage in the range 3 - 40V and output voltage 1.5 - 35V. The module offers smooth voltage and current regulation via a multi-turn potentiometer and practical operation status indication with LEDs. Maximum output current is 3A (heatsink required). Circuit efficiency reaches ~90%, and the fixed switching frequency is 150 kHz. The module is ideal for powering microcontrollers, including Arduino, ESP8266, ESP32, and Raspberry Pi. Depending on the set voltage and load, using a heatsink is recommended to avoid overheating the circuit. The heatsink is not included in the kit. Key technical specifications

* Input voltage: 3 - 40V * Output voltage: 1.5 - 35V * Maximum current: 2A (up to 3A with a heatsink) * Efficiency: ~90% * Fixed switching frequency: 150 kHz * Dimensions: 43 x 21 x 13 mm * Regulation: smooth voltage and current regulation (multi-turn potentiometer) * Indication: built-in LEDs

Example applications

* Powering electronic circuits and microcontrollers (Arduino, ESP32, Raspberry Pi) * Powering high-power LEDs * Charging rechargeable battery cells * Voltage step-down in DIY and robotics projects * Voltage stabilization in emergency backup power systems

Benefits

* Versatility: wide input and output voltage range allows use in many projects * Precision: multi-turn potentiometer enables very accurate setting of operating parameters * High efficiency: ~90% efficiency minimizes energy losses * Compact size: small footprint (43 x 21 x 13 mm) eases mounting in tight enclosures * Ease of use: built-in LEDs simplify monitoring of device operating status