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DC-DC Step Down Converter 3A – Mini (4.5V~24Vdc to 1.8V 2.5V 3.3V 5V 9V 12Vdc)


Mini super size DC step-down module with 97.5% efficiency DC-DC 12-24V To 5V 3A Step Down Power Supply Module Voltage Buck Converter Adjustable 97.5% 1.8V 2.5V 3.3V 5V 9V 12V

Product Introduction:

  1. Input Voltage: DC 4.5-24V
  2. Output Voltage: integration adjustable and fixed output, backside can choose fixed output voltage
  3. Adjustable Range: 0.8-17V,fixed voltage (1.8V 2.5V 3.3V 5V 9V 12V)
  4. Output Current: 3A (max),actual testing input 12V output 1.5A
  5. Transform Efficiency: 97.5%(max) (6.5 to 5V 0.7A)
  6. Switch Frequency: 500KHz
  7. Output Ripple Wave:20mV (12V to 5V 3A) 20m band width
  8. Operating Voltage: -40 Celsius-85 Celsius
  9. Output Overvoltage Protection: no
  10. Static Current: 0.85MA
  11. Load Adjust Rate: 1%
  12. Voltage Adjust Rate: 0.5%
  13. Dynamic Response Speed:5% 200uS
  14. Output Short Circuit Protection: yes
  15. Input Transposition Protection: no
  16. Enable Control: yes
  17. Connecting Type: soldering
  18. Input Way: soldering
  19. Output Way: soldering/pin
  20. Soldering Hole Space: 2.54mm


  • The output current is up to 3A, and the long-term operation is 2.1A, and the margin is sufficient.
  • With a new scheme design, the circuit design does not require electrolytic capacitors and tantalum capacitors (electrolytic capacitors have a short lifetime and the tantalum capacitors are in danger of explosion). Two large-size solid-state ceramic capacitors (MCCs) for high-end circuits are used.
  • The new scheme adopts synchronous rectification, and the circuit conversion efficiency is very high. When the 6.5V turns 5V 0.7A, the efficiency is as high as 97.5%, and when 12V turns 5V 1A, it also reaches 94%. Unlike the peers, the efficiency is only 60-70%. . (The efficiency test removes the voltage drop across the input reverse-protection diode and fuse).
  • Adopt high-current shielding inductor, ultra-low internal resistance, and increase conversion efficiency. Reduce heat.
  • Ultra-small size, 20 (length) * 11 (width) * 5 (height) mm, the smallest network.
  • Ultra-low quiescent current, quiescent current 0.85 mA. Connected to the car battery without a switch, can be connected to the cigarette lighter line, or ACC power line.
  • The output is integrated with adjustable and fixed voltage. The fixed output is not required to be customized. It can be directly soldered on the board. It is very voltage-sensitive and can be adjusted by potentiometer. It is very versatile.
  • Integrated enable port, default is working mode, low level is off, which brings convenience to control
  • Can be used to replace 78 series linear regulators, such as 7805 7812 and so on.


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