TPS562219: TPS562219 output current oscillation

Hermes Lin1

Part Number: TPS562219

hi sir:

TPS562219 output current oscillation.

What is cause the current oscillation? please help command to resolve this issue.

Vin=12V; Vout=1.2V ;Io=0.2A

Current (Green:current oscillation)

Output ripple

0 Gavin Wang (Zejing) over 7 years ago

PLs help probe SW pin , output voltage and output current in one picture.

0 Anthony Lang over 7 years ago

Hi Hermes,

Could I know how and where did you measure the current? How is it operating for the Reset circuit at output?

0 Vental Mao over 7 years ago

Is the LP512 a bead? If yes, remove it or remove it behind the line which connect Vout to the RP514 .

Besides, pls upload your layout

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