kindly provide ADR02 spice model
Unfortunately we do not have a SPICE model for the ADR02 at the moment.
Is there a particular parameter that you want to check? What were you looking to simulate? Perhaps we can provide the data that you need.
as per the datasheet turn on settling time is 4us for CL of 0.01uf
i want to know at what input voltage threshold point it will start generating the output voltage(5V) and how much time it will take to generate the output voltage(5V) for CL of 0.1uf.
Thanks & regards,
I will check if we've taken this data before. If not, I will try to measure it out for you.
I will get back to you soon.
Thank you for your response.
I am waiting for your reply.
iam awaiting for your reply
"I want to know at what input voltage threshold point it will start generating the output voltage(5V)..."
This is known as the headroom or dropout voltage and is specified in the data sheet as 2 V minimum.
"Dropout Voltage (VDO) Dropout voltage, sometimes referred to as supply voltage headroom or supply output voltage differential, is defined as the minimum voltage differential between the input and output necessary for the device to operate, such as VDO = (VIN – VOUT)min|IL = Constant. Because the dropout voltage depends upon the current passing through the device, it is always specified for a given load current."
"... and how much time it will take to generate the output voltage(5V) for CL of 0.1uf."
This is power on settling time and is not related to the headroom. Kris is working to measure this for you and will share the data shortly. The settling is the amount of time it takes for the part to turn on and reach a stable output. This will be heavily dependent on the output capacitor, larger capacitors will lead to larger turn on time.
My input is 28V and input capacitance is 2uf,output capacitance is 0.1uf,how much time it will take output to reach 5V
Thanks & regards
Please see attached for some data gathered for the settling time of the ADR02. I was not able to replicate your exact setup, but there is some information we can gather from this data. It can be observed that as the input is increased, there is an increase in the peak voltage that the output reaches before it starts to come back down and settle to its final value. This seems to imply that there may be some threshold that the output needs to meet before the feedback kicks in. Hence, with higher input, you would see a longer settling time.
If you are interested in checking the settling time of your exact setup, the test setup is below:
One thing to note though: you have a very large input capacitor. Keep in mind that this will draw a large current upon start-up, and that your source should be able to handle that current. This will also slow down the rise time of your input voltage, which will also contribute to the settling time of the output.
Retrieving data ...