LM2596 overview
LM2596 DC-DC Buck Converter Step Down Module Power Supply is a step-down(buck) switching regulator. LM2596 Buck is 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, and 12 V, and an adjustable output version. The LM2596 Stepdown module is operating at a switching frequency of 150kHz, thus allowing smaller-sized filter components than what would be required with lower frequency switching regulators
Key specifications
Model Name
DC-DC LM2596S buck module
Input Voltage
3.2V~46V (recommended for use in 40V)
Output Voltage
1.25V~35V
Output Current
3A (maximum)
Conversion Efficiency
92% (highest)
Output Ripple
<30mV
Switching Frequency
65KHz
Working Temperature
-45 ~ +85
Datasheet
20150123144301750.pdf
LM2596 features
- Non-Isolated Step-Down (BUCK) Switching Regulator.
- Short Circuit Protection: Current limiting, Self-Recovery
- Potentiometer Adjustment Direction
- Non-Synchronous Rectification
LM2596 pinout
| Name | Description |
|---|---|
| VIN | This pin connects the input supply with the input filter capacitor to prevent voltage spikes at the input. |
| Output | The circuit is different for fixed regulators and Adj. version |
| Ground | This pin is connected to the ground and a heatsink. |
| Feedback | This pin returns feedback voltage to the internal comparators for regulation. |
| ON/OFF | It is a negative trigger terminal, this means grounding (0 volts) will enable, and 1.3 V or higher volts will disable the operations of the internal circuit. |
LM2596 specifications
| Model Name | DC-DC LM2596S buck module |
|---|---|
| Input Voltage | 3.2V~46V (recommended for use in 40V) |
| Output Voltage | 1.25V~35V |
| Output Current | 3A (maximum) |
| Conversion Efficiency | 92% (highest) |
| Output Ripple | <30mV |
| Switching Frequency | 65KHz |
| Working Temperature | -45 ~ +85 |
| Dimension | 21mm * 43mm * 14mm (length * width * height) |
LM2596 applications
- Power supply conversion and regulation in electronic devices.
- Battery charging systems for various applications.
- Solar power systems for voltage regulation and battery charging.
- LED lighting systems for efficient power conversion.
- DIY electronics projects requiring voltage step-down or step-up.
- Automotive electronics for voltage conversion and regulation.
- Mobile devices and USB charging systems.
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