Dc Dc Step Down

GS R405S GSR405S 405 Power module DC DC IC REG SW STEP DOWN 4A 5.1V
US $37.60
DC DC 6 32V 12V to 0.8 28V 150W regulator Step Up Down Car Power Supply module
US $39.48
SMUN 48V TO 12V 30A 360W DC DC Step Down Converter Car Power Supply
US $21.85