LM27762: The negative output doesn't reach the designed value. Positive works fine

Part Number:LM27762

Hi everybody, newbe here.

I recently design a board for the LM27762, my aim is to have a dual rail supply for some op amps. Let's say +- 5 V @250 mA.

The main issue is that I can't get the right negative voltage from the IC. The positive output works fine.

PCB schema

PCB layout

photo

Front                                                                                                           Back

BOM

R3 - 1.5k P1.50KHCT-ND

LED -APTD1608LCGCK

C5 - 10uF GRM31CR61H106MA12L

R4 -10k  CRCW060310K0FKTA

C16- 1uF 732-7907-1-ND

C19-4.7uF C2012X5R1E475K125AB

R5/R14  1.6M YAG3327CT-ND

R12/R13 500k RC1608F4993CS

C17/C18 2.2uF 311-1814-1-ND

Oscilloscope output:

Positive and negative output:

Positive and negative zoom

C+ and C-

What I did wrong? Thank you in advance.