Hi Lakshmi,
From my customer:
Thanks for the reply. I probably didn’t phrase my question right. I intend to run both the LMZ31707 and the LMZ31530 at PVIN=3.6V (nom) and VIN= 5.3V (nom). I did want to simulate with PVIN= 3.6V. The Webench has PVIN and VIN tied together, so the minimum it will allow at that node is 4.5V for the LMZ31707 .
This is a pretty important opp for us in that they just won a major design and have traditionally used LTC. We think we have the MCU and Data Convertors so this would be all additional $$ for us.
Could I ask you to jump on the phone with him if this isn’t something that easily answered? I don’t want to have too many email iterations of this if possible.
Thanks,
Dan
From: Lakshmi Holehonnur [mailto:bounce-1001331@mail.e2e.ti.com]
Sent: Friday, May 02, 2014 4:53 PM
To: switcherpro@mail.e2e.ti.com
Subject: RE: [Power and Lighting Tools Forum] LMZ31707
Sent: Friday, May 02, 2014 4:53 PM
To: switcherpro@mail.e2e.ti.com
Subject: RE: [Power and Lighting Tools Forum] LMZ31707
Hi Dan,
PVIN is the supply for the powerstage, while VIN is the supply for the rest of the IC. In the real device this is done to minimize the effect of switching noise on other circuitry. In the model it does not matter if the PVIN and VIN pins are connected together since all the voltage sources are ideal.
If you would still like to, you can connect PVIN and VIN pins to two different voltage sources. Hope that answers your question.
Regards,
Lakshmi
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