MPM4730 questions regarding datasheet

Integrated Inductor Power Modules
1

First of all I would like to say I really like the MPS power module line. I used some buck converter modules in my design and they work flawlessly.
Now I want to design in the MPM4730 Buck/boost converter, however, probably because English is not my native tongue, I have some problems understanding the datasheet.
The three letter abbreviation OTP is used in two different ways: Over temperature protection and One Time Programmable memory. The question is about OTP memory: On the forum I found an answer (other device) that OTP is used to program factory settings. My interpretation is that the end-user can’t program this memory, my question is is this correct? If not why mention it is the datasheet, very confusing. Second question is, taken from the datasheet:
"These items have one-time programmable (OTP) non-volatile memory (NVM). The OTP is reloaded to the I2C register when VIN exceeds the under-voltage lockout (UVLO) threshold, or during EN shutdown. "
Does this mean that every time I disable the device by EN->0 I need to reconfigure the I2C registers if I want another output voltage (while Vin is present) other than the configuration via the feedback resistors?
Is it allowed to omit R2 so there is no output when enabled and enable via I2C? Or or does the OTP kicks in in this situation?

Thank you in advance!
Marco

4

Hi Marco,

Welcome to MPS Technical Forum!

I will answer your questions one by one. If there’s anything I’ve said that isn’t clear, feel free to reply.

First thing is One Time Programmable memory. You are correct, usually OTP is used to program factory settings. But if you need we can OTP according to your request during factory production (usually the large volume orders).

For your second question, your understanding is correct. You need to rewrite the voltage every time you power on. The input voltage is determined by the feedback resistor and the I2C register together. It is the voltage output on the FB pin that is directly changed by your actions on the GUI, so you don’t need to do anything with the feedback resistor.

Best,
Fox