LDO- pass device driver
- From: jutek <jutek13NO_SPAM@xxxxx>
- Date: Sun, 15 Jan 2006 23:36:33 +0100
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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