The schematic in Figure 1 shows an LTC3850 based
circuit that operates from a 7V to 24V input, at a switching frequency of 530kHz, requires no current sense resistors and provides separate outputs of 2.5V/5A and 3.3V/5A. By using the inductor's DC resistance as the current sense element, the application dissipates as little power as possible at full load currents.
Figure 1: CD Dual 3.3V/2.5V output LTC3850 schematic from a 7V to 24V supply.
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The efficiency of rge regulator in Figure 1 is above 90%, as shown in the efficiency curve in Figure 2.
Figure 2: Efficiency curve of Figure 1 circuit.
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