ADP5135 has an irregular on-/off-time

Discussion created by a.bernhard on Apr 19, 2017
Latest reply on Apr 21, 2017 by jespirit

After a redesign there are problems with the ADP5135. The output voltage is at 3.8V with 0.5A to 1A load. The output voltage is constant at 3.8V. But the signal at SW3 hat an irregular on-/off-time. See attached picture.

Has anyone an idea where the problems are?

BTW: PWM/PSM is active