GW: re-design power supply

[cbrake]

Problems with the current supply:

• hard to solder
• expensive

Requirements:

• input 6V lead acid battery to 24V industrial (drop requirement that it run from 5V)
• 5V output @ 460mA max (particle Boron max current)
• easy to solder
• reasonable cost

LMR50410 is a new part that looks interesting. It does not support 100% duty cycle, but dropout is low enough that it seems reasonable:

At 0.5 draw (would never be continuous), will regulate down to 5.4V, which is much lower than a typical lead acid discharge.