LM5146-Q1: Topic of current output capability of LM5146-Q1

Part Number: LM5146-Q1

Tool/software:

1: I saw the output current capability technical parameters of LM5146-Q1 as 20A/30A on TI's official website. What parameter limitation of the chip does the output current capability limit depend on? Or is it considering the limitation of external MOS, inductor, capacitor, etc.? Can you give us a detailed answer (for example, 48V input, 12V output requirement)

2: If the maximum output current we need is 40A, does this chip support it? And what is the load current response time from 100mA to 40A, and from 40A to 100mA?