TPS22965: Effect of Input Capacitance on Vout Rise Time (tR)

wjm12

Part Number: TPS22965

I would like to use a 4.7 uF as the input capacitance. Will equation 1 in the datasheet be affected by the input capacitance value? I ask because the table that follows equation 1 specifies typical rise time values with the note that CIN = 1 uF.

over 7 years ago

0 Aleksandras_Kaknevicius over 7 years ago

TI__Genius 15780 points

Hi Julie,

The only purpose of the input capacitance is to help the power supply handle the transient current needed during power up of the load switch. The input capacitance does not affect the load switch performance itself, and as long as the power supply is strong enough, there will be no difference in the rise times seen by the device.

Thanks,

Alek Kaknevicius

0 wjm12 over 7 years ago in reply to Aleksandras_Kaknevicius

Prodigy 50 points

that is what I thought, thanks!

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TPS22965: Effect of Input Capacitance on Vout Rise Time (tR)