Buck or Step Down DC/DC Converters comparison (under construction) #036

 

MP1584 (MonolithicPower) - BUCK /Step down
 input 4.5 to 28v
 output 0.8 to 25v
 output 1.8A (typical), 3.0A (max)
 efficiency up to near 92% (according to datasheet graph using 12Vin 1Amp out)
 thermal shutdown

 Reviews:
 Youtube OnState 121 MP1584 Ultra Small Adjustable Mini DC Step-down Buck Converter Module testing
  Vin 5v @  0.12A > Vout 3.3v @ 165mA  0,54W 91%, stable, low ripples, above 7.6Vin=unstable SW.
  Vin 5v @  0.59A > Vout 3.3v @ 700mA  2.31W 78%, stable, low ripples.
  Vin 9v @  0.15A > Vout 5v @ 250mA  1.25W 93%, stable, low ripples. 10Vin=unstable SW.
  Vin 9v @  0.79A > Vout 5v @ 1.06A  5.32W 75%, stable, low ripples.
  Vin 12v @  0.6A > Vout 5v @ 1.06A  5.32W 74%, stable, low ripples, 0.8Vp-p spikes, some jittery switching at various input voltages.
  Vin 24v @  0.66A > Vout 12v @ 1.2A 14.4W 91%, stable, 0.2Vp-p  ripples, 1.5Vp-p spikes.

2.0-2.7V output = sometimes unstable switching.  Less than 2.0V out = unstable switching.  Less than 2.5V in/out voltage = unstable switching.
Small size inductor is good to 1.5A output.

 Youtube review : Fuente DCDC Step Down Buck Modulo MP1584 _ Análisis y Pruebas _ Sponsor PCBgogo
  Vin 12v @ 0.4A Vout 5v @ 0.9A  efficiency 93.7%
  Vin 12v @ 0.9A Vout 5v @ 1.8A  efficiency 83.3%

Sweet spot, if Vout = 3.3, then Vin = 5 <> Vin 12, Vout 9..5 @ 1 Amp , so 9W to 5Watts 

MP2307 (MonolithicPower) - BUCK /Step down (MINI360)
 input 4.75 to 23v
 output 1V to 17V
 output 1.8A (typical), 3.0A (max)
 Efficiency up to 96%
 thermal shutdown
 > datasheet mentions MP2393(uses better mosfet)

 Reviews:
 Youtube Onstate 116: MP2307 mini synchronous DC buck converter module power supply

  Vin 12v @  0.11A > Vout 3.32v @ 330mA  1,1W 83.5%
  Vin 12v @  0.21A > Vout 3.32v @ 700mA  2,35W 93.5%
  Vin 12v @  0.23A > Vout 5v @ 500mA  2,5W 90.6%, stable, low ripples, 2Vp-p spikes.
  Vin 23v @  0.71A > Vout 11.97v @ 1.2A  14,3W 88%, unstable, 1Vp-p ripples, 1.5Vp-p spikes.

 webpage review : https://goughlui.com/2018/07/04/tested-mini-360-mp2307-based-3a-buck-converter-module/
 quiescent current 41ma (12v)
 efficiency Vin 20v..6v  Vout 5v @ 500ma is near 90%
 efficiency Vin 20v..6v  Vout 5v @ 250ma is near 70%

 review: https://lygte-info.dk
  quiescent current 4v > 75mA
  quiescent current 8v..22v 35..45mA
  efficiency Vin 19 Vout 15v @ 250..2250mA is above 90% Sweet Spot
  efficiency Vin 22v..10 Vout 9v @ 1AMP is above 90% Sweet Spot

 Sweet spot, output current higher then 500mA and lower then 1A, wide voltage ranges.

MP2315 (MonolithicPower) - BUCK /Step Down
 input 4.5 to 24v
 output 0.8 to 17v
 output 2A (3 A max)
 efficiency up to 97.5%
 thermal shutdown
 datasheet graph specs:
  > Vin 12v  out 5 @ 3Amp..100mA 90%
  > Vin 6.5v Vout 5 @ 3Amp..100mA 95%

Reviews:
 Youtube Onstate 208: MP2315 24V 3A mini synchronous DC buck converter module

  Vin 12v @  0.05A > Vout 3.39v @ 170mA  0.6W 96.76%
  Vin 12v @  0.1A > Vout 3.38v @ 338mA  1.14W 95.20%
  Vin 12v @  0.21A > Vout 3.38v @ 720mA  2.43W 96.46%
  Vin 12v @  0.49A > Vout 5.23v @ 1.11A  5.82W 98.97%
  Vin 12v @  0.24A > Vout 5.24v @ 524mA  2.75W 95.34%
  Vin 14v @  0.76A > Vout 10.1v @ 1.01A  10.20W 95.87%
  Vin 14v @  0.37A > Vout 10.1v @ 505mA  5.1W 98.46%
  Vin 24v @  0.22A > Vout 10.1v @ 505mA  5.1W 96.60%
  Vin 24v @  0.45A > Vout 10.1v @ 1.01A  10.20W 94.45%

94-98% efficiency,  low ripple output.

 Sweet spot, output current higher then 500mA and lower then 1.5A, wide voltage ranges.