TPS628502-Q1: TPS628502 Bode Plot Simulation Issue

Hello,

Could you please share the schematic used for simulation?

Have you tried to increase the Cout to improve the phase margin?

Regards,

Febin

Hi, Febin,

Thanks for your reply.

The schematic can be listed as below.

Cin   = 10uF x2,

Cout = 10uFx2,

L=0.47uF,

CFF=0.1nF, 1nF, 10nF

On the other hand, we want to understand better Cff for both of AC & Load Transient.

Thanks & Best Regards !!

Schematic_Load Transient.pptx

Hello,

I will review and update you in one or two days.

Regards,

Febin

Hello,

I did a quick simulation with the same BOM and I get 72.5deg PM...

Regards,

Febin

Which CFF value (0.1n, 1n ,10nF) is optimized for us ?

If PWM setting freq. =2.25MHz, how about cross-frequency ( 285 KHz --> or ... ) ?

Thanks & Best Regards ~