Hi Hirotsugu,
Regarding the problem you are facing, it is very important to strictly follow our guideline for LMZ1xxx and LMZ2xxx Power Module Family, shown here:
https://www.ti.com.cn/lit/an/snaa214b/snaa214b.pdf?ts=1625023418650&ref_url=https%253A%252F…
Please take a look at 42Vin device with 3A capability.
Buck selection is driven by peak inductor current (eq 5/6) and voltage imposed between vin and IC gnd (34V).
www.ti.com/.../TPSM53603
Part Number: TPSM53602 Other Parts Discussed in Thread: TPSM53603 , , TPSM82822 , TPS82085 Hi team,
I get a WEBENCH alert at following configuration: Vin 4.1V -5.5V Vout 1.2V (or 1.1V) Iout 1A WEBENCH Power Designer reports:The TPSM53602 device may not be stable…