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for +5V Switching regulator (1)

I measured the temperature rise of the heatsink of the switching regulator which made this time to compare with the generation of heat with the 3 terminal regulator. It is the temperature rise when taking out 5 W(5V x 1A) as the output power at the input voltage of 12 V.
In case of the 3 terminal regulator, 7 W are consumed with the regulator but in case of the switching regulator, they have the consumption electric power of about 1 W.
Because the used heat sink is different-sized, it doesn't become the strict comparison. It is the reference value.

I installed the probe of the thermocouple-type thermometry receptacle at the heatsink and measured it.

The heatsink which I used this time is the following size.