134mA sunds strange ..
How about simple regulated 1A power supply and draw only 134mA out of it ???
Details here: https://www.eleinmec.com/article.asp?16 ..
Try using dc-dc power supply regulator.
It is more efficient, and will avoid energy wastage.
DC-dc converter LM2576, is able to accept input of up to 40V,
regulating the voltage at 5V or other preset voltage.
It is an efficient form of power regulation.