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TPS63030 Vin to Vina Resistance

Mike H Meyer
Expert 1560 points
Other Parts Discussed in Thread: TPS63030

Is there a specified resistance between the Vin and Vina pins on the TPS63030?  I've got an application where the input may have a specific frequency associated with it and it would be preferable to design a low pass filter by bypassing the Vina pin to keep the frequency out of the control circuitry.

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    TI__Genius 17240 points

    The internal resistance from VIN to VINA is approximately 100 ohms. However, the TPS63030 is not designed to operate with a noisy VIN. Depending on the severity of the input noise, It may be best for you to use an LDO or filter the input prior to VIN.  Do you have analog oscilloscope screen shots of the input? What are VIN, VOUT, and IOUT for you application?