DC - DC Buck/Boost Converters

MT3608 - Boost Converter (Step Up Voltage)

Input: 2 - 24V DC
Max Output: 28V
Max Current: 2A 

LM2596 - Buck Regulator (Step Down Voltage)

Input: 4 - 40V DC
Output: 1.25 - 35V
Max Current: 2A (3A with Heatsink)