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TPS65132: Ripple of VNEG of TPS65132 is too big

Part Number: TPS65132

Dear all,

Here we use TPS65132A to supply LCD screen of a tablet, the AC ripple of VNEG seems to reach 700mV, too large. While I use pin2pin solution-NT50358. The ripple is much smaller. I don't think it's normal. Look forward to your reply.

(1)DC of AVEE of TPS65132A:

(2)AC of AVEE of TPS65132A:

(3)AC of AVEE of NT50358: