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.
PH pins (10,13,14,15,16,17,18,19,42) – according to the datasheet shouldn't be connected to anything and stay floating. When I look at the EVB it seems you connected it to AGND through a resistor. The EVB indicate do not assemble the resistor
AGND pins (2,23) – according to the datasheet shouldn't be connected to anything and stay floating. When I look at the EVB it seems you connected it to PGND through a resistor. The EVB indicate do not assemble the resistor
So, do I really need these resistors in my layout? Can I remove them?
The layout consideration doesn't show how to connect between the copper plane of PH and AGND through resistor, and also doesn't show how to connect the PGND and AGND through a resistor (page 26 in datasheet). Can you provide the layout of the EVB board?
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 meital rave:
The schematic for the LMZ31710 EVM shows a test point on the PH node and a test point for AGND. These would be used for monitoring the PH for switching frequency. These test points are NOT recommended to be added your layout.
The resistor (R15) shown in the schematic is not required on your layout. The PGND to AGND connection is made internal to the LMZ31710 device.
In reply to J Arrigo:
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. 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 respect to these materials. 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.