I have an issue with my power supply tree:
6V -> LT8362 -> -6V -> LT3091 -> -5V
When I power on my board and I enable the LT3091:
- the LT8362 output is oscillating (dc=-5.5V, ac=1.5V)
- the LT3091 output is noisy
Please find above my schematic
- the schematic works well with LTSpice
- the LT8362 works well and generates -6V when the LT3091 is disabled
- the LT3091 works well when I supply the -6V with a lab power supply.
Any thoughts ? It would be very appreciated.
Thank you !