Hello, everyone
I'm looking for another solution which could replace the LDO circuits to supply voltage to digital circuit. The requirement of this circuit need to achieve the low power consumption and available on chip.
1. This circuit provides power for digital circuit (digital circuit consumes peak current about 1mA and average current is 1uA). To block the noise which is produced by digital circuit switching
2. If the circuit is not good enough to block the noise. "Does it is matter if the power is not purely (ripple on the LDO output, 0.1~0.3v @ 3V) enough and what happens if it supply the amplifier of crystal oscillator? (32767 KHz)" Does it affect the property of the oscillation circuit ? ex: start up time or stability