STD90N02L - STD90N02L-1

Buck converter

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Buck converter

The power losses associated with the FETs in a Synchronous Buck converter can be

estimated using the equations shown in the table below. The formulas give a good

approximation, for the sake of performance comparison, of how different pairs of devices

affect the converter efficiency. However a very important parameter, the working

temperature, is not considered. The real device behavior is really dependent on how the

heat generated inside the devices is removed to allow for a safer working junction

temperature.

The low side (SW2) device requires:

avoid the cross conduction phenomenon.

The high side (SW1) device requires:

gate

Figure 15.

Synchronous buck converter