Hi, my question is which architecture has higher power efficiency? and why?
Assuming I can not use switching/charging pump supply. 5V supply has 100mA load current. 3.3V has 350mA load current.
solution 1:
12Vin -> LDO 5Vout -> LDO 3.3V
solution 2:
12Vin -> LDO 5Vout
12Vin -> LDO 3.3Vout
Thanks,