Quite well, cause I tested one TI type and ST type as well. You can use one 1,2V cell supplied by solar power and boost it to power LED or whatever.biff44 said:Wow, I am impressed! How do those chips work at .5V in?
The original requirement is 0.5V operation. Si BJT can't reliably work at 0.5 V (at least not work at lower temperatures). Ge BJT or depeletion mode FET would be required. The said TPS612xx and similar have a switched cap startup circuitry and thus can work at lower supply voltages. Unfortunately, the output current at Vi = 0.5V isn't sufficient.A pretty old-school setup is a center-tapped transformer
with cross-coupled NPNs at the ends and supply at the