Hi Team,
I think the FB pin of the LM25149 can change the voltage, but do you have any data on the responsiveness?
Also, is it possible to output a negative voltage by connecting a negative voltage power supply?
Best Regards,
Tom
This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
Hi Team,
I think the FB pin of the LM25149 can change the voltage, but do you have any data on the responsiveness?
Also, is it possible to output a negative voltage by connecting a negative voltage power supply?
Best Regards,
Tom
Hi Tom,
The FB pin is the internal reference point of the device and also how the device regulates the output voltage. The top and bottom resistors are picked for a output voltage so that the FB voltage is 800mV.
Any buck device can be configured to be an inverting buck boost where the device will regulate to a negative output voltage given a positive input voltage.
For more details please refer to app note : https://www.ti.com/lit/an/snva856b/snva856b.pdf
Regards,
Jimmy