Is it possible for LTM4637 to generate negative output? eg:12V input -5v output 20A?
The maximum input voltage is 18V of LTM4630, so I don't think it is suitable for 12V input & -5V output(20A). In this case, I think it would be better to use two LTM4638 than two LTM4637, because LTM4638 is cheaper than LTM4637. Am I right ?
I checked Phase Margin (PM) using LTpowerCAD about LTM4637.
I loaded default solution in LTpowerCAD.
When Iout = 20 A, Phase + 180 deg is enough in all frequency.
When Iout = a few A,
Iout = 数Aの場合、PM > 70 deg
However, Phase + 180 deg < 20 deg @ …
You are right. Buck uModules can be used to give negative output voltage. LTM4601/02, LTM4637 can all be used in these applications.
The output of uModule should be connected to system GND and GND of uModule connect to -Vout. This is a buck-boost configuration…