LMR14030-Q1: Frequency VS VFB curve figure

Tommy Tzeng

Genius 5790 points

Part Number: LMR14030-Q1

Hi sir,

The LMR14030-Q1 feedback reference voltage tolerance is within 2%,but what does the following curve figure mean?

the tolerance for rising and falling under different switch frequency %? is it right?

over 6 years ago

0 Gavin Wang (Zejing) over 6 years ago

TI__Expert 3480 points

Hi Tommy,
It does nothing to do with the tolerance. Under different FB voltage below reference, the switching frequency will become lower. It is the curve shows how the frequency changes according to different FB.

Gavin

0 Andy Chen over 6 years ago

TI__Mastermind 34875 points

Hi,

As Vout always has ripple, so there must be proper hysteresis at VFB trip point(75%,50% etc..of VREF=0.75V) to avoid Fsw frequently jump between closing foldback level.

Power management

Power management forum

LMR14030-Q1: Frequency VS VFB curve figure