U403: change from 74LVC2G125 to 74LVC2G126 The two parts have the same footprint and pinout, but '126 3-state buffers have active-high OE inputs instead of active-low. The change is purely for software benefit: having GPIO 11/12 set to 1 correspond to that current contribution being enabled will be much more intuitive for developers and tinkerers.

module regulator_ic (IN, OUT, GND, EN);

input IN, GND, EN;
output OUT;

pkg_IC_5pin pkg (.pin_1(IN),
		 .pin_2(GND),
		 .pin_3(EN),
		 .pin_4(),	/* no connect */
		 .pin_5(OUT)
	);

endmodule