LM2596s DC to DC Buck Converter Power Module

SKU: PDD-002
  • Input Voltage Range: DC 3.2V to 40V (Input voltage must be at least 1.5V higher than output voltage).
  • Output Voltage Range: DC 1.25V to 35V adjustable, with a maximum output current of 3A.
  • High Efficiency: Achieves up to 92% power conversion efficiency. Tested with 12V input, 5V output at 1A load, maintaining a load regulation rate of under 1%.
  • Simple Operation: Connect the power supply (3-40V) to activate the power indicator and start the module. Adjust the blue potentiometer knob (clockwise to increase voltage, counterclockwise to decrease) while monitoring the output voltage with a multimeter until the desired value is reached. Ideal for debugging system voltage ranges.
  • Important Notes: For long-term use, maintain a current of 2.5A or lower and consider adding a heat sink for outputs above 10W. As a step-down module, ensure a minimum 1.5V voltage difference between input and output for stable operation.

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This high-performance non-isolated step-down (BUCK) power regulator module is designed for efficient and stable DC voltage conversion. It supports a wide input range of 3.2V to 40V and provides an adjustable output from 1.25V to 35V, with a maximum output current of 3A. The module leverages the high-quality LM2596 chip for superior conversion efficiency, reaching up to 92% while maintaining low heat generation. The inclusion of original Sanyo low ESR filter capacitors minimizes output ripple to just 30mV, delivering performance comparable to linear power supplies. The robust design, featuring machine placement and reflow soldering, ensures reliability with each unit undergoing a rigorous two-hour aging test before shipping. Compact and versatile, this module is ideal for applications requiring precise voltage regulation in embedded systems, IoT devices, or power supply projects. For long-term stability, it is recommended to keep the operating current within 2A and use a heat sink for outputs exceeding 10W.

Key Features:

  • High-Performance LM2596 Chip: Ensures high efficiency (up to 92%) with low heat generation, capable of delivering 3A for short-term applications. For stable long-term operation, limit the current to within 2A and use a heat sink for outputs above 10W.
  • Low Ripple Voltage: Equipped with original Sanyo low ESR filter capacitors, achieving ripple voltage as low as 30mV—comparable to linear power supplies.
  • High Reliability: Manufactured using machine placement and reflow soldering, with each module undergoing a rigorous two-hour aging test to ensure reliability and performance.

Specifications

Module Type Non-isolated step-down (BUCK)
Rectification Non-synchronous rectification
Input Voltage DC 3.2V to 40V
Output Voltage DC 1.25V to 35V (adjustable)
Output Current 3A (maximum)
Recommended Current ≤ 2A for long-term use
Conversion Efficiency Up to 92%
Switching Frequency 65KHz
Output Ripple ≤ 30mV
Load Regulation ±0.5%
Voltage Regulation ±2.5%
Operating Temperature -40°C to +85°C
Dimensions (LWH) 43mm x 21mm x 14mm

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