LM2596S DC-DC Step-Down Buck Converter with SMD LED

LM2596S DC-DC Step-Down Buck Converter Module

The LM2596S with SMD LED is a highly efficient DC-DC step-down (buck) switching regulator module. Based on the Texas Instruments LM2596 IC, it delivers stable adjustable output voltage from 1.5V to 35V with a rated current of 2A (maximum 3A) and up to 92% conversion efficiency — far superior to linear regulators like the 7805.

Key Features

• Input Voltage: 3V – 40V DC
• Output Voltage: 1.5V – 35V DC (Adjustable via onboard potentiometer)
• Output Current: Rated 2A, Maximum 3A (heatsink required above 2.5A)
• Switching Frequency: 150 kHz — allows smaller filter components
• Conversion Efficiency: Up to 92%
• Operating Temperature: -40°C to +85°C (Industrial grade)
• SMD LED Indicator: Power-on status indicator
• Short Circuit Protection: Current limiting with auto-recovery
• Module Type: Non-isolated constant voltage, non-synchronous rectification

Technical Specifications

• Input Voltage: 3 – 40V
• Output Voltage: 1.5 – 35V (Adjustable)
• Output Current: 2A rated, 3A max
• Switching Frequency: 150 kHz
• Efficiency: 92% (max)
• Operating Temp: -40°C to +85°C
• IC: LM2596S

Package Contents

• 1 × LM2596S with SMD LED DC-DC Step-Down Power Supply Module

Compatible With

Arduino UNO, Arduino Mega, ESP32, ESP8266, Raspberry Pi, and all projects requiring a stable regulated DC power supply.

Why Buy from KSP Electronics?

• Genuine components with quality testing
• Pan-India delivery with real-time tracking
• GST invoice on all orders
• Dedicated technical support

Frequently Asked Questions

How do I set the output voltage?
Connect the input supply, measure the output with a multimeter and turn the blue potentiometer screw until you reach the required voltage. Set it before connecting your load.

What input voltage do I need?
The input must be at least 1.5–2V higher than the output you set, and within the 3–40V input range.

Can it power an ESP32 or Raspberry Pi?
Yes. Set it to 5V for a Raspberry Pi or the 5V/VIN pin of an ESP32/Arduino. For loads above 2A continuous, add a heatsink.

Is it a step-up converter?
No — the LM2596S only steps voltage down. For boosting voltage use an MT3608 or XL6009 module.