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 $42.00
high voltage dc dc converter 12V 12V4A step up and down dc dc converter
US $20.99