Hi Team,
Customer use TPS548A28 in two rails. And have some questions on the bode. Could you pls comments?
1), 0.75V MERLIN rail, TPS548A28, Vin=12V, L=1.5uH, C=47uFx5, Rdivider_up=2.92k, Rdivider_down=10k, Cff=2200p
【Question】The phase curve flies high at hi freq, we can not read out the GM in this case.
Left : null load;
right: Full load 3A.
2), 3.3V Aux rail, TPS548A28, Vin=12V, L=2.2uH, C=100uFx3, Rdivider_up=45.3k, Rdivider_down=10k, Cff=470p
Left : null load;
right: Full load 5A.
【Question】The phase curve flies high at hi freq, we can not read out the GM in this case.
Regards,
Hailiang
