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Power management

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LT1054: increase LT1054 oscillator frequency

Polly Chung1

Intellectual 2110 points

Part Number: LT1054

Dear team,

Page 10 of LT1054 datasheet said we could increase oscillator frequency by adding C2, may I know which frequency will correspond to the capacitor value ranging from 5pF to 20pF? And what is the maximum frequency that we can adjust? Besides, could I use adding C2 to control oscillator frequency which is always larger than 25kHz? Because we would like to avoid audible noise. Thank you.

Regards,

Polly Chung

over 5 years ago

0 Garrett Roecker over 5 years ago

TI__Mastermind 21720 points

Hi Polly,

Thanks for reaching out with your question.

Do you know what configuration you would like to run? The datasheet talks about configuration 1 (Capacitor from pin 7 to GND) and configuration 2 (Capacitor from pin 2 to pin 7).

Thanks,

Garrett

0 Polly Chung1 over 5 years ago in reply to Garrett Roecker

TI__Intellectual 2110 points

Dear Garrett,

Thanks for your reply. I would like to increase frequency, so I think it is configuration 2 (Capacitor from pin 2 to pin 7).

Best Regards,

Polly

0 Garrett Roecker over 5 years ago in reply to Polly Chung1

TI__Mastermind 21720 points

Hi Polly,

I am checking with a colleague to double check the operation. I will get back to you shortly.

Thanks,

Garrett

0 Garrett Roecker over 5 years ago in reply to Garrett Roecker

TI__Mastermind 21720 points

Hi Polly,

I will contact you directly about this application.

Thanks,

Garrett