LTM4626 Simulation Help

Tyler GD on Jan 29, 2020

Hello,

I'm trying to setup the LTM4626 circuit in LTSpice based on the Demo Board DC2665A-A. As you can see the PGOOD pin is tied to INTVCC through a 100K resistor.

DC2665A-A Demo Schematic

My LTSpice Schematic

But when I simulate the above LTSpice circuit my output is not 3.3V.

Now if I remove PGOOD from being tied to INTVCC then I get 3.3V.

Please help.

Top Replies

tkozono
Feb 10, 2020 +1 suggested
Hi Tyler GD,

Please connect the Vosns- pin. It may be helpful to start from the macromodel test fixture which will have all the necessary connections.

1) Press F2 to open the "Select Component Symbol"…

0 tkozono

on Feb 10, 2020 5:22 PM over 1 year ago
Hi Tyler GD,

Please connect the Vosns- pin. It may be helpful to start from the macromodel test fixture which will have all the necessary connections.

1) Press F2 to open the "Select Component Symbol" window

2) Search for LTM4626

3) Click "Open this macromodel's test fixture"

4) Save As so you don't overwrite the test fixture save file.
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