42V转5V,42V转3.3V,42V转3V的DC-DC降压芯片和LDO芯片选型 42V转24V,42V转20V,42V转15V ,42V转12V,42V转9V,42V转5V,42V转3.3V,42V转3V,42V转1.8V,42V转1.2V.