pianomania
Member level 5
lots of uvlo design spec define an absolute value like , UVLO trip voltage =1.4v,
and some use comparator and vin divided by resistor , or diode string.
but if we want to design a power saving uvlo and the spec is like UVLO trip= Vin-0.7, it is defined as ... "Vin away from 0.7v. ..." that is if the Vin raise up to the dedicate Vin away from 0.7v , then the output will =0 .
how can we do that by just some simple MOS ( not comparator) . and the vin range will operater from 2.5 to 5.5V ?
and some use comparator and vin divided by resistor , or diode string.
but if we want to design a power saving uvlo and the spec is like UVLO trip= Vin-0.7, it is defined as ... "Vin away from 0.7v. ..." that is if the Vin raise up to the dedicate Vin away from 0.7v , then the output will =0 .
how can we do that by just some simple MOS ( not comparator) . and the vin range will operater from 2.5 to 5.5V ?