JacobsParts Inc.
JacobsParts Inc. LM2596 Buck Step-Down Module 4-38V to 1.25-37V 75W 5A LED Voltmeter
Buck step-down module converts 4.0-38V DC to adjustable 1.25-37V DC at up to 5A with built-in voltmeter display
- TypeStep Down (Buck) Voltage Regulator
- Current Rating5 A
- Power Rating75 W
- FeaturesDC to DC
- Stable output across varying input voltages with LM2596 regulation
- Integrated voltmeter monitors input and output levels in real time
- Up to 96 percent conversion efficiency reduces energy loss
- Delivers up to 75 watts peak and 50 watts sustained power
- Compact 66 by 40 by 12 millimetre module fits tight spaces
Buck Step-Down Module with LED Voltmeter
The JacobsParts LM2596 module converts a DC input between 4.0 and 38 volts down to an adjustable 1.25 to 37 volts. An integrated voltmeter displays both input and output levels for quick monitoring. It suits hobbyists and engineers who need a compact, constant-voltage supply for LED strips, 5 volt USB devices, or low-voltage electronics from a higher-voltage source such as a 12 volt battery. The unit is not designed to drive raw LEDs directly.
Sustained Load Performance
The regulator peaks at 75 watts or 5 amps but is rated for 50 watts or 3.5 amps under continuous operation, whichever limit is reached first. Conversion efficiency reaches up to 96 percent, reducing heat during extended use. The LM2596 IC switches at 150 kilohertz, helping maintain stable output during prolonged loads. Input voltage must remain at least 1.5 volts above the desired output to sustain regulation.
Input Voltage Headroom Requirement
The buck topology demands that the supply voltage exceeds the target output by a minimum of 1.5 volts, so a 5 volt output needs at least 6.5 volts at the input terminals. Reverse polarity on either the input or output side can damage the module. Maximum input is capped at 38 volts and maximum output at 37 volts, defining the practical operating window for any project.
Highlights
- Stable output across varying input voltages with LM2596 regulation
- Integrated voltmeter monitors input and output levels in real time
- Up to 96 percent conversion efficiency reduces energy loss
- Delivers up to 75 watts peak and 50 watts sustained power
- Compact 66 by 40 by 12 millimetre module fits tight spaces
Specifications
| Type | Step Down (Buck) Voltage Regulator |
|---|---|
| Current Rating | 5 A |
| Power Rating | 75 W |
| Features | DC to DC |
Questions about this item
How much heat does the LM2596 module generate when running at the 50 W sustained load all day?
At up to 96 % conversion efficiency, only a small fraction of the 50 W sustained load becomes heat; the 66 x 40 x 12 mm board relies on natural airflow, so keep it ventilated during continuous use.
What power source must I already have to supply the 4.0–38 V DC input the module requires?
Any DC source between 4.0 V and 38 V that can deliver the needed current — for example a 12 V battery or a bench supply — provided it stays at least 1.5 V above your desired output voltage.
Will the 150 kHz switching frequency of this LM2596 board interfere with older analog audio gear I keep in the same rack?
The 150 kHz switching operates well above the audio band; with proper wiring and grounding the module runs cleanly alongside legacy equipment.
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