LDO- pass device driver

J

jutek

Jan 1, 1970
0
hello

i am trying to choose a proper pass device size.

I am using an ibm 0.13um model.

I simulate lowest input voltage and max load current conditions. i want
it to work in the saturation error.


When i use W=10m L=0.5u Vgs should be -0.62V to give me 100mA

It means Vg potential is +0.68V I have also one severe demand. Pass
device leakage current should be less than 5uA

The highest input voltage is 3.3V.

My question is about opamp's output which drives pass device. How to
assure this voltage swing?

regards
 
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