ldo with offchip bipolar - request for resources

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hhchien

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ldo with offchip bipolar

Please help me!

I need to design a ldo by cmos process, but its pass element is an offchip bjt.

Please give me some suggestion or some paper of same type ldo.

thanks.
 

Re: ldo with offchip bipolar

Please see my attach file.

Please give me some suggestion.

Why I measured different waveform from same current load(15mA)??

Is it a stability issue?
 

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