LM2596 DC-DC Elc. Cap Buck Converter Adjustable Step Down Power Supply Module

SKU: VM00571

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The LM2596 series of regulators are monolithic integrated circuits that provide all the active functions for 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.

Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation, and a fixed frequency oscillator. The LM2596 series operates at a switching frequency of 150 kHz, thus allowing smaller sized filter components than what would be required with lower frequency switching regulators. Available in a standard 5-pin TO-220 package with several different lead bend options, and a 5-pin TO-263 surface mount package.

Technical Specification:

  • Input Voltage (V):4 ~ 40 V
  • Output Voltage(V):3 ~ 35V
  • Output Current (A): 3A
  • Conversion efficiency: 92%(highest)
  • Switching frequency: 150 KHz
  • Output ripple: 30mA (maximum)
  • Load Regulation: ± 0.5%
  • Voltage Regulation: ± 0.5%
  • Dynamic Response speed: 5% 200uS
  • Operating Temperature (°C): -40 to 90
  • Size: 40mm*20mm (L*W)


  • Requires only four external components 
  • Excellent line and load regulation specifications 
  • 150-kHz Fixed-frequency internal oscillator 
  • TTL shutdown capability 
  • Uses readily available standard inductors 
  • Thermal shutdown and current-limit protection 


  • Appliances
  • Grid infrastructure
  • EPOS
  • Home theater

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