Hi I'm designing the power supply for a portable audio device. It has a SHARC DSP, some interface logic and amplifiers. I need several voltage sources:
- 1.2V DSP core
- 3.3V DSP digital interface
- +/- 5V Interface logic, LED's
- +/-12V Amplifiers
- 48V Phantom supply The battery pack is intended to give 11..13V.
Do I have to desing for every source a seperate DC/DC converter or does it make sense to operate with linear regulator's (power loss)?
Is there a step down converter which is able to produce several output voltages (+/-12V, +/-5V)?
Regards Roman