Re: What type of LDO structure for digital circuits in a SoC
Hello,
So, the charge pump needs because we use a n-channel MOS pass device.
What's the reason of that we use n-channel MOS transistor as pass device?
Why don't we need an external capacitor? (Maybe the pass device gate source capacitance will guarantee the needed pole?)
Added after 4 hours 52 minutes:
Hello,
Does anybody have the article about the charge pump and nMOS pass element?:
O. Chevalerias, F. Rodes, K. Salmi, C. Scarabello: "4-V 5-mA low drop-out regulator using series pass N-channel MOSFET", Electron. Lett., vol. 35, pp. 1214-1215, July 1999
Thanks,