reg101 fixed voltage

Fenggi Yang

Prodigy 40 points

Other Parts Discussed in Thread: REG101

Dear Sir

the REG101 datasheet suggests to use 0.01uF on the NR pin for fixed voltage

application. Can I use 0.1uF instead?

Thank you very much

over 10 years ago

0 Ryan Eslinger over 10 years ago

TI__Guru 55940 points

Hi Fenggi,

The larger Cnr will slow the start-up time of the device. You will want to try it out in your application or on a test board to make sure that it will start up fast enough for your application.

Please note that there will be no appreciable noise improvement with a capacitor larger than 0.1uF. As you can see in the figure copied from the datasheet below, the RMS Noise flattens at 0.01uF.

Very Respectfully,

Ryan

0 Fenggi Yang over 10 years ago in reply to Ryan Eslinger

Prodigy 40 points

Thanks Ryan, appreciate your help, I'll give it a try

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reg101 fixed voltage