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good PMIC for ultra-low noise op-amps

xyz xyz
Intellectual 1000 points
Other Parts Discussed in Thread: LMH6552, LMH6629

Hello

I'm designing some ultra low noise amplifier based on ultra-low noise op-amp such as LMH6629 to amplify very small signals  and and LMH6552 for driving an ADC.

there are many PMICs but practically which PMICs are more useful for such application? 

the input voltage between is regulated and between 5 to 7 volt but is not low noise.

LMH6629 needs symmetric ±2.5V  and LMH6552 needs ±5V supply.

Regards