Part Number: LMZM33606
Tool/software: WEBENCH® Design Tools
I'm using the LMZM33606 to generate 12 V - 5A from a battery.
The battery voltage range is: 14 - 20 V.
Using WEBENCH software it says: "Design update failed. This design is not stable due phase margin either smaller than 35 or greater than 120"
On datasheet, the allowed voltage droput is 1.1xVout.
Why? Can you help me?
We are able to replicate this issue and we are looking into the loop model of this device. We will get back to you on this.
Thanks & Regards,Praveen
We are glad that we were able to resolve this issue, and will now proceed to close this thread.
If you have further questions related to this thread, you may click "Ask a related question" below. The newly created question will be automatically linked to this question.
In reply to Praveen Badiger:
Thanks for your work!
I look forward to hearing from you.
In reply to Damiano Balzani:
Do you have news?
I had the exact same issue in Webench for LMZM33606.Unfortunately on the datasheet there is no mention of phase margins whatsoever, therefore I am not sure whether I should trust this simulation warning or not.
I hope this is cleared asap. Thank you.
In reply to ARM:
The effective value of the total output capacitor is coming out to be very low and hence it is causing a low phase margin. We are working on the component selection of the output capacitor (Cout). We will keep you updated on this.
Thanks & Regards,
We are working on it. We will keep you updated on this.
I hope for good news.
All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.
TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs andembedded processors, along with software, tools and the industry’s largest sales/support staff.