[time-nuts] Re: Micrel (Microchip) PL-500 Low Phase Noise VCXO

[Lux, Jim]

On 9/18/21 7:38 AM, Bob kb8tq wrote:
>
> You need a quiet linear regulator feeding the chip. Any switcher will drive it nuts.
> Indeed a lot of LDO’s are not very quiet. They also may be very poor at isolating
> you from switcher “crud”. You need to be careful about what you pick.

LT3042 and LT3045 are your friend here.  Excellent PSRR well up past 10 MHz.

If you need more current, you can just parallel them.

$6 each for the 3045 from Digikey