TPS22992: charge pump noise

Victor Levy

Intellectual 2406 points

Part Number: TPS22992

Hi,

I have a customer who is asking the following questions regarding this family:

What is the charge pump noise on the output?
What is the Ron on range load of 1A to 5A with 5V bias?

Could you please advise?

Thanks,

over 2 years ago

0 Kalin Burnside over 2 years ago

TI__Genius 13300 points

Hello VL,

The noise from load switches are negligible in a system and the charge pump strength isn't strong enough to create significant noise. It also does not oscillate at frequencies in the fm band. What is the application and primary concern for this?

The specified max ON resistance is over the recommended operating condition and this includes variability over temperature and load current.

Regards,

Kalin Burnside

0 Victor Levy over 2 years ago in reply to Kalin Burnside

TI__Intellectual 2406 points

Hi Kalin,

Thank you for your answer,

The application is an ultrasound, therefore this is of primary concern (between 2MHz-10MHz),

Are there any noise measurements made from the charge pump?

Best regards,

0 Kalin Burnside over 2 years ago in reply to Victor Levy

TI__Genius 13300 points

Hello Victor,

We do not have any measurements or characterization data for EMI performance of load switches. The expected range would be in kHz.

Regards,

Kalin Burnside

Power management

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TPS22992: charge pump noise