On Sun, 17 Sep 2006 10:56:03 +0300, Vasile Surducan wrote:
> I'm designing a RF module using a transciever which need a very
> stable supply for the VCO and PLL. The requirements are:
> availability (US), smallest size (SOT23, SC70), low noise and high
> PSRR at around 2.8V output and less than 100mA load.
> So far I found MAX8510 which theoretically has less than 60uVpp
> noise and 78dB PSRR at 1Khz. However my previous experience with
> MAXIM LDO's shows that the noise is much bigger on the board at the
> LDO output, than specified in the datasheet, and if there is a
> switching load (as an oscillator) is worse even with all rejecting
> capacitors. Anyone have some experience with MAX8510 or with other
> low noise LDO regulator of the same type/category ?

I've had really good results with the TI TPS792xx series regulators.
Maxim availability is so bad that I don't even look at them any more
unless it's as a 2nd source.

Matt Pobursky
Maximum Performance Systems




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