Using a ceramic cap + resistor in series for LDO reg

[Psi]

As the subject says, are there any downsides of using a ceramic cap with series resistor to increase ESR on an LDO?

I have a circuit with a LDO (LM2937) and i've been using a good quality tantalum cap up until now because the LDO goes unstable with a ceramic cap and there is no room for an electrolytic cap.

I'm now getting the PCBs made in china and i don't really trust that they will use a good quality tantalum cap.
Even if i give them the digikey part number and say 'no substitutes' they could use factory seconds that look identical.

So it would be great if i can just reuse an existing 47uF ceramic cap + 1R resistor.

Can anyone see any issues with this?

[capt bullshot]

Done that before - works. You could even use a PCB track of defined length and width in your layout to increase the ESR of the capacitor.

[Rerouter]

As long as you keep your traces short to minimize inductance, i foresee no issue,

In general i would probably try and use a ceramic compatible LDO, but in a pinch, yes this should work fine.

[Psi]

The datasheet seems to imply that this LDO is ok with low esr chip caps.
However my testing would disagree with this statement.

The LM2937 requires an output bypass capacitor for stability. As with most low dropout regulators, the ESR of this capacitor remains a critical design parameter, but the LM2937 includes special  compensation circuitry that relaxes ESR. The device is stable for all ESR below 3 ?. This allows the use of low ESR chip capacitors

Edit: It also says it must be above 10mR?. So i guess my ceramic cap was under this.
Should be easy to simulate 10mR with a PCB trace as said above.

[Zero999]

So what frequency does it oscillate at?

Have you tried a ferrite bead in series with the output?

How about using an excessively large, low ESR capacitor?

[mariush]

See http://www.ti.com/lit/ds/symlink/lm2937.pdf  page 13

So at least 10mOhm and 10uF ... note that a 1-uF ceramic capacitor may not be 10uF at the output voltage of your regulator. You would normally want to use higher values like 15uF or 22uF if you go with ceramic, or at least 2 x 10uF in parallel.