Why we measure Ignd current, Vout accuracy, load reg and line reg in a LDO?

[myql]

Hi,

Can somebody tell me what is the importance of getting or measuring the value of Ignd current, Vout accuracy, load reg and line reg measurements? can you give me some artivcle that discusses the functionality and parameter testing of an LDO?


Thanks

 

[R00KIE]

About LDO

About the value of Ignd I have no idea (you are not very specific, maybe it's related with the voltage drop between the ldo and the load due to the series resistance of the connection)
Vout accuracy (if I'm not mistaken) is related to the output you get, that is, the ldo may be able to regulate very precisely a voltage but how close is that voltage to the one stated in the datasheet? (Take a look at the definitions of accuracy and precision, I never know very well which one is which myself ^^;; )
Load regulation is related to the load as the name says, this tells how much the output voltage of the ldo changes with the load (if you ask more or less current at the output).
Line regulation tells you how much the output voltage changes when you change the voltage at the input of the ldo (without changing anything on the output side).
I hope this helps a little.

 

[deh_fuhrer]

Re: About LDO

Ignd is the undesirable current that flows through the driver transistor under no load condition..It is desirable for calculating the LDO efficiency...