Variable Output DC-DC Step Down Converter (based on LM2596S)
The DC-DC Buck Converter Step Down Module LM2596 Power Supply is a step-down (buck) switching regulator capable of driving a 3-A load with excellent line and load regulation.
These devices are available in fixed output voltages of 3.3 V, 5 V, 12 V, and an adjustable output version.
The LM2596 series operates at a switching frequency of 150 kHz, which allows smaller filter components than would be required with lower-frequency switching regulators.
Features
- Input voltage: 4-38V
- Output voltage: 1.5-35V (adjustable)
- Output current: rated current is 2A, maximum 3A (an additional heatsink is required)
- Module properties: non-isolated constant voltage module
- Rectification: non-synchronous rectification
- Short circuit protection: current limiting, since the recovery
- Dimensions: 43.5 x 21 x 14 mm (L x W x H)
LM2596S Step Down Converter: 4V to 38V Input and an Adjustable Output
The LM2596S step down converter accepts an input from 4V to 38V DC. As an adjustable output buck converter, it gives you any output between 1.5V and 35V, so one module can power many different loads. It is a non-isolated, non-synchronous buck design: the input and output share a common ground, and a diode handles the rectification. That keeps the circuit simple, small and inexpensive, which suits hobby and lab projects.
LM2596S Buck Converter Module: Setting the Output Voltage
With an LM2596S buck converter module, set the output voltage before you connect your device. Power the module with no load, measure the output with a multimeter, and adjust it until you reach the voltage you need, then connect the load. Keep the input voltage higher than the output you want, with some margin, because a buck converter can only step voltage down and never up.
DC-DC Step Down Converter 3A: Current and Heat
As a DC-DC step down converter 3A module, the board is rated for 2A of continuous output current and can reach 3A at maximum, and an additional heatsink is required when you draw high current. The current limiting helps protect the module and your circuit if the output is shorted. For heavier loads, look at the XL4016 8A step down converter. If your source is higher than 38V, such as a 48V supply, see the LM2596HVS step down converter (4.5~60Vdc input).
Frequently Asked Questions
What is the input voltage range of LM2596S?
The module accepts 4V to 38V DC.
What is the output voltage range?
The output is adjustable from 1.5V to 35V DC.
How much current can an LM2596S module deliver?
It is rated for 2A, with a maximum of 3A. An additional heatsink is required.
What is the difference between LM2596S and LM2596HVS?
The LM2596HVS is the high-voltage version, and the module in our store accepts inputs up to 60V. This LM2596S module accepts inputs from 4V to 38V.
Is the LM2596S module isolated?
No. It is a non-isolated constant voltage module, so the input and output share a common ground.
Can it step voltage up?
No. A buck converter only steps voltage down, so the output is always lower than the input.
What switching frequency does it use?
The LM2596 series switches at 150 kHz, which allows smaller filter components.
This LM2596 power supply module is a simple, adjustable way to power your circuits from a 4V to 38V DC source. If you are building a power supply or a control board for your engineering graduation projects this term, RAM Electronics offers the LM2596S step down converter in Egypt along with other DC-DC modules. Contact us if you need help choosing the right converter for your input voltage and current.