LMR38020-Q1: Bypass Capacitor

hi, Chinnan,

A few 10nF caps and some 10uF/50V caps is typically a good starting point. Usually based on DS application circuit is good to use.

What's detail in  ISO 16750-2 4.4 ?I am not very familiar with its requirements. 

Elena

The 16750-2 4.4 is basically checking how to eliminate the AC content in the power supply line.

The peak to peak will be 1V

The freq Varies from 50 Hz to  25 KHz.

The waveform given below.

Pls guide how to bypass this ac element using cap

I will reply to you next Monday.

hi， Chin，

Looking from EVM suggestion ,please see the input side have 33 bulk and 2.2uf+100nf +1nf MLCC

https://www.ti.com/lit/ug/snvu817/snvu817.pdf?ts=1699849573491&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FLMR38020-Q1

and if you can also design a RC with 25k=1/2pi*RC

Elena