- Mon Mar 27, 2017 2:41 pm
#64298
Hi,
1st) an ldo only has a low dropout voltage, say: can work closer to the empty battery level.
example:
standard regulator would need 1V difference -> won't work below 4.3V battery voltage
ldo only needs ~0.3V differende -> can work down to 3.6V battery voltage.
2nd) quiescent current: for low energy profile you need regulator with only some µA qc compared to standard with 10mA and more.
3rd) if it is an standard LiIon battery, it has about 4.2V freshly charged, what is too much for esp8266, and 3.2V allmost empty what is too low even for ldo.
a LiFePo4 has 3.6V freshly charged and 3.2V allmost empty what is perfect for esp8266 w/o regulator.