I have two LTC3388-3 that are powered by the same Vin rail @12V. Another VR, LT3971-3.3, is also at the same Vin rail. No load is attached to the output of the VRs and my goal is to check the power-efficiency of the VR at this scenario.
The problem now is the dual supply. Do you see it possible to use 2x LTC3388-3 for achieving +/-5V from a single 9V supply and then use two LDO for powering the system with +/-4.5V for audio application?