Descriptions: LM2596 DC-DC Adjustable Step Down Module

This module features the adjustable LM2596 step-down (buck) switching regulator, capable of driving a 3A load with excellent line and load regulation.

This module has a multi-turn trimpot (potentiometer) that you can use to adjust the LM2596's output voltage. Since the trimpot has 25 turns of adjustment you can easily adjust the output of the module to exactly the voltage you need.

The simplest way to reduce the voltage of a DC supply voltage is to use a linear voltage regulator (LDO), but linear regulators step down voltage by dissipating the excess energy as heat and do not yield any current step up.Buck converters, on the other hand, can be remarkably efficient and provide a step up in current output. Buck converters are one of the best ways to provide a regulated voltage from a battery since they don't waste near as much energy in the process of dropping the input voltage as a linear regulator would waste.

As an example of the characteristics of this module, Addicore ran a test with a 15V supply input and the output of the module adjusted to 5V with a 100 ohm load connected on the output. The input current was 24.8 mA, while the output current was 47.84 mA. That is nearly double the input current. You won't ever see that happen with a linear voltage regulator. We were able to change the input supply voltage down to 6.5V before the output voltage started to dip below 5V. The output voltage was still 4.99V, even with the input supply voltage at 6V. As we were adjusting the input supply voltage, the output didn't waiver a bit until around the 6.5V mentioned before and we didn't have to adjust the trimpot at all for the LM2596 to maintain the same output voltage. That is a perfect example of why switching buck converters can be such a great way to convert DC voltages.

Features:

Conversion Efficiency: Up to 92% (output voltage higher, the higher the efficiency)Switching Frequency: 150KHzRectifier: Non-Synchronous RectificationModule Properties: Non-isolated step-down module (buck)Short Circuit Protection: Current limiting, since the recoveryOperating Temperature: Industrial grade (-40 to +85 ) (output power 10W or less)Full load Temperature rise: 40Load Regulation: ± 0.5%Voltage Regulation: ± 2.5%Dynamic Response speed: 5% 200uSDimension: 43*20*14mm (L*W*H)

Instructions:

1. Power (3-40V), power indicator light, the module is working properly.

2. Adjust the blue potentiometer knob (clockwise rotation generally boost,counter-clockwise rotationTurn down) and reach with a multimeter to monitor the output voltage required voltage.

Please make sure all of the "IN-" "IN+" "OUT-" "OUT+" marks are inserted Rightly,otherwise the module will be damaged.

Documents:

lm2596

Package Included:

1 x LM2596 DC-DC Step-down Module

• Input Voltage: 3.2V - 40VDC
• Output Voltage: 1.25V - 35VDC
• Max. Output Current: 3A
• Max. Efficiency: 92%
• Output Ripple: ≤100mV
• Switching Frequency: 65KHz