Other Parts Discussed in Thread: LM5008, , LMR36006-Q1, LMR36506-Q1, LMR36503-Q1
Tool/software: WEBENCH® Design Tools
Here's the power supply design I am working on, which will be used in 12V or 24V vehicles (there will be a TVS diode and reverse polarity protection Schottky between Vin and Cin in the final design):
Webench Designer recommends only up to 100uF for Cin, but there will be voltage dips during cranking that I can likely address with a larger bulk input capacitance. Specifically, I am thinking about using at least one 330uF aluminum electrolytic capacitor, possibly two in parallel. That would be considerably more capacitance than the 100uF recommended limit of Webench Designer, so I would like to know if my large bulk input capacitance will pose a stability problem? If so, what is the work-around so I can add more bulk input capacitance within affecting stability?