LMS3655: Datasheet + WEBENCH

PAN-M

Mastermind 8375 points

Part Number: LMS3655

Hi,

A value of the FB resistances of Figure 23 is wrong.
This is a value of 3.3V.

The ESR of the output capacitor is 25mohm, but the input of more than 10mohm suffers an error in WEBENCH.

Regards,
PAN-M

over 4 years ago

0 Andy Chen over 4 years ago

TI__Mastermind 27085 points

Hi Pan,

Thanks for pointing out the error on Fig 23, will revise it later.

Can you share the Webench design so we can check what's wrong there?

B R

Andy

0 PAN-M over 4 years ago in reply to Andy Chen

Mastermind 8375 points

Thank you for reply.

8372.WBDesign_LMS3655MM_Iout_4A.pdf

Our customer made a board mimicking this WEBENCH output, but this board is oscillated.
This cause is big Cff. (1.2nF)
Therefore I was trying to simulate this circuit of the datasheet by WEBENCH and discovered these problem.
I want WEBENCH to make change if this result is not right.

Best Regards,
PAN-M